taxonID	type	description	language	source
03BB115251249B69479FFA1CFC7CF8CB.taxon	diagnosis	Diagnosis. Body length 10.24 – 11.20 mm. The dorsum is shiny. A series of pits lines the anterior margin of the posterior transverse band on the pronotum (Fig. 1). Tergum VI of the male lacks an accessory genitalic process (Fig. 2). The mesal margins of the laterosternites (evident on segments III – VI of both sexes) are slightly offset from one another and the abdominal venter is brown with a wide, glabrous, yellow marginal band. The midline of sterna V – VIII (males) and V – VII (females) are mostly glabrous and impubis. The pseudoparameres (medial lobes of tergum VIII) are large, broad, posterolaterally directed, with apices broadly rounded and overlapping the lateral lobes (Fig. 3). The proctiger is setose in the middle third and nearly devoid of setae in the lateral thirds (Fig. 5), and the parameres have an apical tuft of elongate setae (Fig. 6). The ventral margins of the phallosoma are mostly unmodified, although sclerotized lobes overlap near the base of the endosoma (Fig. 7). The distal margin of the female subgenital plate is broadly convex medially with roundedly-produced posterolateral corners (Fig. 4).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251249B69479FFA1CFC7CF8CB.taxon	discussion	Discussion. In the original description, La Rivers (1954) recognized the distinction of A. maldonadus from other species of Ambrysus because of the " conspicuous black procts " (= pseudoparameres or medial lobes of tergum VIII) and the outline of the subgenital plate. Later, La Rivers (1963, 1965) further recognized the degree to which this species was atypical by suggesting that it might merit its own subgenus. In the original description of Ambrysus montandoni, La Rivers (1963) made extensive comparisons with A. maldonadus, which he considered to be closely related. This species is known only from Venezuela and bears superficial resemblance to Carvalhoiella nitida in that their size, shape, and glossy appearances are similar; however, Ambrysus maldonadus exhibits other diagnostic attributes consistent with Carvalhoiella, including the loss of setae on the abdominal mediosternites, the head is not produced anteriorly, the anterior margin of the pronotum is only slightly concave to receive the head, the mesal margins of the laterosternites are diagonally offset from one another, the ventral abdominal lateral band is wide, and the pseudoparameres are large and posterolaterally directed (Table 1). It lacks many of the distinguishing features of the genus Ambrysus, including deep invagination of the head into the pronotum, continuous ventral abdominal hair pile, continuous mesal margins of the laterosternites, narrow ventral abdominal lateral band, small male pseudoparameres, and the male accessory genitalic process of tergum VI (Table 1). Thus, Ambrysus maldonadus is transferred to the genus Carvalhoiella.	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251249B69479FFA1CFC7CF8CB.taxon	materials_examined	Type locality: Venezuela, Territorio Amazonas, Mount Marahuaca, Upper Cunucunuma River. Type repository: California Academy of Sciences (holotype ♂ by original designation). Material examined. VENEZUELA: Venezuela Exp., Territ. Amazonas, Upper Cunucunuma, Julian, May 27, 1950 / J. Maldonado Capriles Coll. / Ambrysus maldonadus La Rivers 1954, HOLOTYPE ♂ / Ambrysus maldonadus La Rivers 1954, determined by Ira La Rivers ' 54 / Ira La Rivers Collection, Bequeathed to the California Academy of Sciences — 1978 / California Academy of Sciences Type No. 13409 (Holotype ♂ CAS); same data, Ambrysus maldonadus La Rivers 1954, Paratype / J. T. Polhemus Collection 2014, C. J. Drake Accession (1 ♂, 1 ♀ USNM); Amazonas State, S Puerto Ayachucho, El Tobogan de la Selva, 14 January 2009 / 5 ° 23.207 ' N, 67 ° 36.922 ' W, 125 m, VZ- 20090114 - 01, coll: J. Camacho (1 ♂, 1 ♀ UMC); Amazonas, 42 km S of Puerto Ayacucho Tobogan, 19 January 1989, J. T. Polhemus, CL 2371, (2 ♂, 2 ♀ UMC).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251269B68479FFF4CFEFFF85A.taxon	diagnosis	Diagnosis. Body length 11.20 – 12.96 mm. The dorsum is tuberculate, dull, and irregularly mottled (Fig. 8). A sharp sulcus marks the anterior margin of the posterior transverse band on the pronotum. Tergum VI of the male lacks an accessory genitalic process (Fig. 9). Laterosternites are absent on III – V (males) and III – IV (females) and the abdominal venter is lightly colored with a wide, glabrous, yellow marginal band. The midline of sterna V – VIII (males) and V – VII (females) are mostly glabrous and impubis. The pseudoparameres are large, broad, sharply angled posterolaterad, with angulate apices, and overlapping and extending beyond the lateral lobes of tergum VIII (Fig. 10). The proctiger is setose in the lateral thirds and nearly devoid of setae in the middle third (Fig. 11). The parameres have an apical tuft of elongate setae (Fig. 12). The ventral margins of the phallosoma have two hemispherical, lamellate, sclerotized lobes near the base of the endosoma (Fig. 13). The distal margin of the female subgenital plate is deeply cleft medially (see Rodrigues et al. 2012, Fig. 8).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251269B68479FFF4CFEFFF85A.taxon	discussion	Discussion. The expression of laterosternites has been partially suppressed in this species. Laterosternites III – V in males and III – IV in females are absent, and the mesal margin of V in females is incomplete; the laterosternites are complete thereafter, although difficult to discern beneath the dense hair pile. Although this large species is superficially reminiscent of Cataractocoris, it shares diagnostic attributes consistent with Carvalhoiella, including the loss of setae on the abdominal mediosternites, the head is not produced anteriorly, the anterior margin of the pronotum is only slightly concave to receive the head, the mesal margins of the laterosternites are diagonally offset from one another, the ventral abdominal lateral band is wide, and the pseudoparameres are large and posterolaterally directed (Table 1). It lacks many of the distinguishing features of the genus Ambrysus, including deep invagination of the head into the pronotum, continuous ventral abdominal hair pile, continuous mesal margins of the laterosternites, narrow ventral abdominal lateral band, small male pseudoparameres, and male accessory genitalic process of tergum VI (Table 1). Thus, Ambrysus montandoni is transferred to the genus Carvalhoiella. This species is known only from the Guiana Shield in Brazil, Guyana, and Venezuela. It is perhaps most famously known from El Tobogan de la Selva in Venezuela, which is a large, smooth, rolling granitic slide where water flows in a laminar fashion. Carvalhoiella montandoni can be found here along with C. maldonadus in cracks in the rock and under dead leaves. At El Tobogan, this species was collected with Ambrysus shorti Sites, Carvalhoiella maldonadus (La Rivers) (Naucoridae), Fontidessus toboganensis Miller (Dytiscidae), Berosus garciai Oliva & Short, and Oocyclus petra Short & García (Hydrophilidae).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251269B68479FFF4CFEFFF85A.taxon	materials_examined	Type locality: Venezuela, Territorio Amazonas, Mount Marahuaca, Upper Cunucunuma River. Type repository: California Academy of Sciences (holotype ♂ by original designation). Material examined. BRAZIL: Roraima State, Yanomami indigenous area, Serra de Surucucu (02 ° 49 ’ 53.78 ” N, 63 ° 38 ’ 19.78 ” W), stream without name, 24. XI. 1991, V. Py-Daniel and U. Barbosa coll., (1 ♂ INPA); same data, except collected in river of the waterfall, (1 ♂ INPA; 1 ♂, 1 ♀ DPIC); Yanomami indigenous area, Xitei / Xidéa indigenous park (02 ° 36 ’ 20.54 ” N, 63 ° 52 ’ 27.76 ” W), Igarapé das Irmãs, 17. XI. 1993, V. Py-Daniel and U. Barbosa coll., (1 ♂, 1 ♀ INPA). GUYANA: Lethem (25 km SE), Kumu Falls, 3 ° 15.9 ' N, 59 ° 43.6 ' W, 4 April 1994, PJ Spangler / colln. # 14, side pool at base of falls (2 ♂, 3 immatures USNM). VENEZUELA: Venezuela Exp., Territ. Amazonas, Culebra, N. Duida, June 9, 1950 / J. Maldonado Capriles Coll. / Ambrysus montandoni La Rivers HOLOTYPE / Ambrysus montandoni La Rivers, determined by Ira La Rivers / Ira La Rivers Collection, Bequeathed to the California Academy of Sciences — 1978 / California Academy of Sciences Type No. 13411 (Holotype ♂ CAS); Amazonas State, N Puerto Ayachucho, nr Iboruwa, " Tobogancito ", 13 January 2009 / 5 ° 48.414 ' N, 67 ° 26.313 ' W, 80 m, VZ- 20090113 - 02, coll: J. Camacho (1 ♂, 1 ♀ UMC); Amazonas State, S Puerto Ayachucho, El Tobogan de la Selva, 14 January 2009 / 5 ° 23.207 ' N, 67 ° 36.922 ' W, 125 m, VZ- 20090114 - 01, coll: J. Camacho (4 ♂, 4 ♀ UMC); Amazonas, 42 km S of Puerto Ayacucho Tobogan, 19 January 1989, J. T. Polhemus, CL 2371, (2 ♂, 2 ♀ UMC); Bolivar, 108 km. SW Sta. Elena de Uairen, 4 July 1978, R. S. Miller / blackwater stream (1 ♂ UMC).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251239B6D479FFDBAFBADFB67.taxon	description	Description. Macropterous male. Body length 7.56, width 4.16. Similar to female with the following exceptions: tergum VI with accessory genitalic process extending nearly straight posteriorly, slightly dilated, rounded apically, not reaching posterior margin of VII (Fig. 14). Pseudoparameres of tergum VIII extending directly posteriorly, broadly rounded apically, with elongate setae (Fig. 15). Pygophore with anterior margin obtusely angulate, parameres rounded, with long, dense brush of setae on dorsal surface (Figs. 16, 17). Aedeagus elongate, left side straight, right side angled and slightly curved in distal 1 / 4 (Fig. 17).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251239B6D479FFDBAFBADFB67.taxon	discussion	Discussion. This male specimen was collected in a small, sandy stream with the aquatic beetles Anodocheilus silvestrii (Régimbart), Copelatus sp., Derovatellus lentus (Wehncke), Desmopachria sp., Hydaticus subfasciatus Laporte, Laccophilus sp., Rhantus calidus (Fabricius), Thermonectus variegatus (Laporte) (Dytiscidae), Epimetopus sp. (Epimetopidae), Chasmogenus sp., Helochares sp., Hydrobiomorpha sp. Tropisternus chalybeus Laporte (Hydrophilidae), and Notomicrus cf. traili Sharp (Noteridae). The female is known from a single specimen collected in Guyana, Region 9 (Sites 2015).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251239B6D479FFDBAFBADFB67.taxon	materials_examined	Material examined. GUYANA: Region 6, 4 ° 09.143 ' N, 58 ° 11.207 ' W, 105 m, Upper Berbice, c. 1 km W Basecamp 1, small sandy stream, leg. A. Short, 21. ix. 2014, GY 14 - 0921 - 03 A (1 ♂ UMC).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251229B62479FF92DFDACFD84.taxon	discussion	Discussion. This species was known from the Guiana Shield countries of Brazil, French Guiana, Guyana, and Suriname (Nieser 1975). While examining many specimens from these countries in addition to Bolivia, Peru, and Venezuela it became evident that this genus is not monotypic. Differences in the female subgenital plate and male mediotergite VII were apparent. Female subgenital plates exhibited two forms: one with straight, convergent lateral margins and no tubercle (Fig. 18), the other with sinuate lateral margins and a median tubercle (Fig. 19). Variation in expression of male mediotergite VII included shape-related differences in the right lateral process and presence / absence and shape differences in the left process. More specifically, the right process is always present and varied from elongate and narrow (Figs. 27, 28) to truncate and as wide as long. When present, the left process varied from acuminate (Fig. 27) to a short, rounded production (Fig. 28). We found multiple character states of mediotergite VII within populations; thus, this character apparently is variable and not taxonomically informative. However, the female subgenital plate condition was consistent within populations and is the only character we found that was able to distinguish between species. The holotype and two paratypes of P. usingeri are from Beruri in Beruri municipality near Manaus in the state of Amazonas, Brazil (Fig. 20, green dot). Because the holotype and paratype in the Snow Museum in Kansas (SEMC) are both males, they cannot be determined to species because the female subgenital plate is the only reliable diagnostic character that we have found. However, the topotypic paratype in the Essig Museum at Berkeley (EMEC) is a female; it lacks a tubercle and has straight, convergent margins (Fig. 18), thereby establishing this as the form of P. usingeri. A non-topotypic female paratype from Suriname, housed at EMEC, has a tubercle on the subgenital plate and represents a second species (see below). Picrops usingeri is widespread throughout much of the Amazon Basin and into the Guiana Shield (Fig. 20). Because females are required for identification, samples represented by only males are marked on the map with white circles (Fig. 20); however, specimens from the localities south of the Guiana Shield, especially those in Bolivia, Peru, and Rondônia, probably are P. usingeri. This is the first record of P. usingeri in Venezuela, and of Picrops in Bolivia and Peru. At Sipaliwini in Suriname, P. usingeri was collected with Ambrysus stali La Rivers and Limnocoris burmeisteri De Carlo.	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251229B62479FF92DFDACFD84.taxon	description	Published records. Brazil, British Guiana, French Guiana, Guyana (La Rivers 1952, 1965; Nieser 1975; Pereira & Melo 2007).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB115251229B62479FF92DFDACFD84.taxon	materials_examined	Type locality: Brazil: Lago Berury Region, Rio Purus (= Beruri in Beruri municipality near Manaus in the state of Amazonas). Type material examined. (Holotype ♂, SEMC): Brazil, S. A., Sept. 1935, A. M. Olalla / Rio Purus, Lago Berury Region / Ambrysus usingeri La Rivers Holotype / Ambrysus usingeri La Rivers, determined by Ira La Rivers 1948. Paratypes: same data as holotype / Ambrysus usingeri La Rivers Paratype (1 ♂ SEMC, 1 ♀ EMEC); Cayenne / Museum Paris, coll. Noualhier 1898 / Tapinocoris Nhl. / planisternis Nlh. / Ambrysus usingeri La Rivers Paratype (1 ♂ EMEC). (Paratype from Suriname appears in Material examined below for Picrops tuberculatus n. sp.). Other material examined. BRAZIL: Amazonas, Barcelos, Igarapé Ataiana, # 20, tributário do Rio Negro, 00 ˚ 88 ' 56.57 " S, 62 ˚ 54 ' 13.90 " W, 10. VIII. 2009, PT 1063 (1 ♀ MZUSP); Amazonas, Barcelos, Serra do Aracá, igarapé na floresta antes da Campina, 02. VIII. 2009 (2 ♀ MZUSP); Amazonas, Presidente Figueiredo, AM- 240, Cachoeira da Maroca, 18. VIII. 2011, H. D. D. Rodrigues col. (1 ♀ MZUSP); Amazonas, Presidente Figueiredo, Balneário Marupiara, 02 ° 03 ’ S, 60 ° 06 ’ W, 01. VII. 2011, H. Rodrigues col. (1 ♀ MZUSP); Amazonas, Manaus, Reserva Ducke, VIII. 2011, V. Linard col. (2 ♀ MZUSP); Amazonas, Manaus, Reserva Ducke, Igarapé Acará, 01. VIII. 1985, 2323, E. Blinda & L. Aquino col. (1 ♀ MZUSP); Mato Grosso, Querência, Fazenda Tanguro, 12 ° 54 ' S, 52 ° 22 ' W, E. Wanzeler col. (12 ♂, 6 ♀ MZUSP); Pará, 1719, Rodovia Transcameta, igarapé sem nome, 08. VI. 1988, U. C. Barbosa col. (1 ♀ MZUSP); Pará, 1465, Rio Trombetas, Loc. Jaquiri, 06. III. 1986, F. Peralta & U. Barbosa col. (2 ♀ MZUSP); Pará: Xingu Camp (52 ° 22 ' W 3 ° 39 ' S), Altamira (ca. 60 km S), 7 Oct 1986, P. Spangler & O. Foote / colln. # 12, first jungle stream on trail (1 ♂, 2 ♀ USNM); Pará: Xingu Camp (52 ° 22 ' W 3 ° 39 ' S), Altamira (ca. 60 km S), 3 Oct 1986, P. Spangler & O. Foote / colln. # 6 (2 ♂, 1 ♀ USNM); Rondônia, 210, Bacia do Rio Mutum-Paraná, Igarapé 08: 24, 13. VIII. 1985, V. Py-Daniel & L. Aquino col. (1 ♂, 1 ♀ MZUSP); Rondônia, 1807, Bacia do Rio Jaci-Paraná, Igarapé 13: 05, 10. VIII. 1985, V. Py-Daniel & U. Barbosa col. (1 ♀ MZUSP); Rondônia, 1516, Bacia do Rio Jaci-Paraná, Igarapé 11: 50, 16. VIII. 1985, V. Py-Daniel & L. Aquino col. (1 ♂, 1 ♀ MZUSP). FRENCH GUIANA: drying pools of unnamed tributary to Crique Gregoire, ca. 0.3 km above first falls / N 5.09902, W 53.05318, 29 October 2016, D. Post (1 ♀ UMC); drying pools of unnamed tributatry to Crique Gregoire, 1.4 km above first falls / N 5.09794, W 53.06402, 29 October 2016, D. Post (2 ♀ UMC); Crique Maman, Legard @ Route de Petit-Saut, N 5.06356 ° W 52.99813 ° 34 m; 30 October 2016, D. Post (1 ♀ UMC). SURINAME: Sipaliwini, Kasikasima, 2 ° 58 ' 38.316 ", - 55 ° 23 ' 5.9928 ", 200 m, SR 12 - 0320 - 02 A, 20 March 2012, A. E. Short, sandy stream (4 ♂, 3 ♀ UMC); Sipaliwini Savannah Nature Reserve, Four Brothers Mountains, 2 ° 00.342 ' N, 55 ° 58.149 ' W, 337 m, 31 March 2017, Short & Baca, sandy bottom stream with lots of detritus, SR 17 - 0331 - 01 B (1 ♂, 2 ♀, 1 - 5 th instar, 1 - 2 nd instar UMC); same data except sandy bottom stream emergent veg, SR 17 - 0331 - 01 C (1 ♂, 1 - 5 th instar exuvium, 2 - 4 th instars, 1 - 3 rd instar UMC); same data except Short, sandy bottom stream emergent veg at night, SR 17 - 0331 - 01 F (1 ♀ UMC). VENEZUELA: Amazonas State, S. Samariapo, on Rio Sipapo, Communidad Cano Gato, 16 January 2009 / 4 ° 58.845 ' N, 67 ° 44.345 ' W, 100 m, VZ- 20090116 - 01, coll J. Camacho (1 ♂, 1 ♀ UMC); Amazonas, small stream 1 km N of Alto Mavaca base camp, 2 ° 1 ' 30 " N, 65 ° 7 ' 0 " W, 228 m., 22 ° C, 4 Feb 1989, CL 8006, DA Polhemus (1 ♂, 1 ♀ USNM).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB1152512C9B66479FFA77FD0EF904.taxon	description	Description. Macropterous female. HOLOTYPE, length 9.92; maximum width 6.28. Paratypes (n = 10), length 9.60 – 10.24 (mean = 9.82); maximum width 5.92 – 6.48 (mean = 6.20). General shape elliptical to oval; widest across embolia (Fig. 21); exceptionally dorsoventrally flattened for family. Overall dorsal coloration yellowish anteriorly, wings variable from light to dark brown, extensively mottled; some specimens tinged with rose on head, pronotum, forefemora, and connexiva. Dorsal surface punctate throughout. Ventral coloration yellowish brown. Head. Head length 1.52; maximum width 2.64. Mostly yellow with brown median markings, punctate. Eyes strongly convergent anteriorly, synthlipsis 0.84; thin band of cuticle along posterolateral margin of eye, anterolateral corner of thin band of cuticle right angled; eyes not raised above level of vertex or pronotum. Anterior margin between eyes slightly convex, not extending anteriorly in front of eyes; posterior margin between eyes strongly convex, extending posteriorly 39 % of head length. Labrum width 1.65 × length, evenly rounded. Labium with three visible yellowish brown segments, darkening distally, extending 0.40 beyond labrum not including extruded stylets. Antennal proportions 1: 7: 6: 3; length 0.68; extending to near lateral margin of eye; segment 2 broad, flattened, quadrate; segments 3 and 4 elongate, slender, with long setae. Thorax. Pronotum punctate; ground color medium yellow; major brown markings medial, mid-lateral, posterolateral, anterolateral; other smaller brown markings and punctures; transverse sulcus marking anterior border of transverse band in posterior 1 / 4; lateral margins convergent, evenly convex, explanate; posterior margin straight; anterior margin deeply concave between eyes to embrace convex posterior margin of head; posterolateral corner doubled, anterior corner distinctly, obtusely angled, posterior corner rounded; greatest width 8.51 × length at midline; length at midline 0.62; maximum width at posterolateral corners 5.28. Prothorax ventrally yellow and pruinose throughout except white, glabrous, shining cuticle along lateral margin and extending mesad near middle; elongate setae throughout much of pruinose area; apices of propleura meeting at midline, not appressed to prosternellum. Probasisternum becoming more prominent anteromedially, culminating in darkly colored spinelike production at anterior margin. Mesoepisternum with rounded lobe over base of coxa making mesal end of pleural suture curved. Scutellum punctate; triangular; yellowish with contiguous, broad, brown, irregular suffusion on both sides of midline; width 4.0 × length, width 3.40, length 0.84. Hemelytra punctate, pale to medium brown, darker mottling throughout, membrane darker and nearly concolorous, length 7.60 (chord measurement). Claval commissure 1.24. Embolium length 3.16, greatest width 1.06, lateral margin convex, pale in anterior 3 / 4 and brown posteriorly. Hind wings extending to anterior margin of tergum VI. Mesobasisternum flat, with sulcus on midline continuing through subtriangular mesosternellum. Metasternellum (= metaxyphus) moderately elongate, subtriangular, with lateral margins concave, apex acuminate. Legs. All legs segments yellowish. Profemur posterior margin with row of short brown spines along basal half, anterior margin with dense pad of setae without associated spines. Protibia and tarsus with occlusal inner surface flattened and with spatulate setae; tarsus one-segmented, movable; pretarsal claw indistinct. Procoxa with cluster of stout, brown anteromedial spines. Meso- and metacoxae partially recessed into thorax. Meso- and metafemora slender, with row of elongate hairs along posterior margins; metafemur with row of short brown pegs on distal 2 / 3 of posteroventral margin. Mesotibia with ventrolateral, dorsolateral, and two medial rows of stout reddish-brown spines; medial rows of spines include combs of 3 – 5 spines; ventral surface with 4 distal comb rows of spines. Metatibia with ventrolateral, dorsolateral, ventromedial, and dorsomedial rows of single (not in combs) stout reddish-brown spines; mesal surface with profuse long, golden swimming hairs; ventral surface with 5 – 8 distal comb rows of spines. Metatarsus with long, golden swimming hairs. Meso- and metapretarsi with paired claws slender, gently curved, with tips dark, basal tooth absent. Leg measurements as follows: foreleg, femur 2.48, tibia 2.26, tarsus 0.40; middle leg, femur 2.52, tibia 2.24, tarsomeres 1 – 3, 0.14, 0.28, 0.33; hind leg, femur 3.16, tibia 3.48, tarsomeres 1 – 3, 0.22, 0.68, 0.52. Abdomen. Dorsally with lateral margins of III – VI exposed, yellow, with dark brown at anterior and posterior margins giving checkered appearance (Fig. 21); lateral margin finely serrate, sparse marginal row of elongate yellow setae, group of trichobothria near posterolateral corners, posterolateral corners acuminate. Posterolateral corner of II (visible ventrally) right angled and not spinose. Ventrally yellow to yellowish brown, with dense pile of fine hairs. Lateral margin with thin, glabrous band. Glabrous rounded to oval patches posterior to spiracles on laterosternites II – VI. Midventral band of elongate setae widening from mediosternite III to subgenital plate. Mediosternite VII (subgenital plate) width 1.0 × length; length at midline 1.14; maximum width 1.12; lateral margins sinuate with concavity in posterior half; posterior margin straight to slightly concave; prominent hairless tubercle on midline near posterior margin (Fig. 19). Macropterous male. Paratypes (n = 10), length 9.20 – 9.84 (mean = 9.47); maximum width 5.76 – 6.24 (mean = 6.01). Setation, posterolateral corners of pronotum, scutellum proportions, embolium length generally same as for holotype. Mediosternite V asymmetrically concave. Midventral band of elongate setae completely covering elongate genital operculum. Abdominal tergum VI without modification. Mediotergite VII modified with digitate lateral process on right side; process on left side variable from acuminate (Fig. 27) to slightly produced (Fig. 28). Medial lobes of tergum VIII (pseudoparameres) poorly developed or absent (Fig. 26). Parameres asymmetrical, elongate, wrapped over phallosoma (Figs. 22, 23, 25). Pygophore with elongate setae sparsely distributed over most of surface, with thick brush on conical posterior margin (Figs. 22, 23). Phallosoma elongate, linear, angled on left and right sides in apical 1 / 4 (Figs. 22, 23); ventral lobes rastrate (Fig. 24).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB1152512C9B66479FFA77FD0EF904.taxon	diagnosis	Diagnosis and comparative notes. Both species of Picrops are easy to recognize to the generic level by their general physiognomy. They are among the most dorsoventrally flattened naucorids with among the most slender legs. These together with the peculiar angular head, pronotal shape, and mottled coloration makes this genus recognizable at a glance. Distinguishing between the species requires female specimens, as is the case with certain groups of Ambrysus (e. g., A. hybridus species group [Reynoso-Velasco & Sites 2016 b]). The female subgenital plate of P. tuberculatus has a prominent, hairless, sometimes lightly pigmented tubercle on the midline near the posterior margin (Fig. 19). In addition, the lateral margins of the subgenital plate are sinuate. In contrast, P. usingeri females lack the tubercle, the lateral margins of the subgenital plate are straight and convergent (Fig. 18), and the posterior margin is usually straight, although in some specimens it can be slightly notched or concave. In males, the right process of mediotergite VII was always digitate in specimens of P. tuberculatus, whereas its condition in P. usingeri was either digitate or short, wide, and truncate. The process of the left side for each species could be acuminate, produced, or rounded. Populations of each species were found to include male specimens with more than one condition of mediotergite VII. We also found variation in male genitalia in the shapes of the pygophore and parameres; however, the variation was not consistent geographically and multiple conditions were present within populations. As such, we considered the male characteristics to be intraspecifically variable and not taxonomically reliable; males must be identified by association with contemporaneously collected females. Habitat description. The habitat of this species is very similar to that of Picrops usingeri: leafpacks in relatively small, shallow, slowly-moving, sandy-bottomed streams running through moist tropical forest (Fig. 29). Adults and nymphs can be found among masses of intact, dead leaves floating on the surface. We collected P. tuberculatus syntopically with Ambrysus stali La Rivers and A. partridgei De Carlo at or adjacent to the type locality.	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB1152512C9B66479FFA77FD0EF904.taxon	discussion	Discussion. The only known congener, Picrops usingeri, occurs widely throughout much of the Amazon Basin and Guiana Shield, whereas P. tuberculatus n. sp. apparently is restricted to the Guiana Shield. Distribution patterns such as this with a widespread species and congeners with restricted ranges are common in other groups of aquatic Heteroptera.	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB1152512C9B66479FFA77FD0EF904.taxon	etymology	Etymology. The species is named for the median tubercle on the female subgenital plate. Repositories. The holotype is deposited in the Muséum National d'Histoire Naturelle — Paris (MNHN). Paratypes will be deposited in the University of Missouri (UMC), University of Kansas (SEMC), University of California — Berkeley (EMEC) and the United States National Museum of Natural History (USNM).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
03BB1152512C9B66479FFA77FD0EF904.taxon	materials_examined	Type material examined. (Holotype ♀, MNHN): FRENCH GUIANA: ca. 6.5 km ESE of Saül, Crique Nouvelle France, N 03 ° 36 ' 22.7 ", W 53 ° 10 ' 34.2 ", 221 m, 8 November 2016, R. W. Sites, leaf packs, L- 1953. Paratypes: same data as holotype (1 ♂, 1 ♀ SEMC; 2 ♂, 3 ♀ UMC); ca. 6.5 km ESE of Saül, Crique Nouvelle France, N 03 ° 35 49.8 ", W 53 ° 10 ' 40.4 ", 200 m, 9 November 2016, R. W. Sites, leaf packs, L- 1955 (3 ♀, 1 - 3 rd instar, 2 - 4 th instars UMC); ca. 8 km NNW of Saül, Crique a l'Est, N 03 ° 39 ' 46.04 ", W 53 ° 13 ' 24.78 ", 156 m, 10 November 2016, R. W. Sites, gravel riffles & veg margins, L- 1956 (2 ♂, 1 ♀ UMC); Crique Nouvelle France @ confl. with Crique Popote / 8 November 2016, D. Post (1 ♀ UMC); Crique Gregoire, below upper waterfall / N 5.09192, W 53.07203, elev 27 m, 27 October 2016, D. Post (1 ♀ UMC); unnamed trib to Sinnimary R., below Takari-Tanté, carbet Takari / N 4.62085, W 52.92808, elev 39 m, 4 November 2016, D. Post (1 ♂, 1 ♀ USNM; 1 ♂, 1 ♀ EMEC; 4 ♂, 3 ♀, 1 - 4 th instar UMC). Other material examined. BRAZIL: Amazonas, Barcelos, Serra do Aracá, afluente do Igarapé da Cobra, B 06, PT 769, folhiço de fundo, 00 ° 52 ' 13.2 " N, 63 ° 27 ' 13.4 " W, A. P. M. Santos col. (1 ♂, 1 ♀ MZUSP); Amazonas, Barcelos, Serra do Aracá, base, # B 08, Igarapé da Cobra, montante, 00 ° 52 ’ 34.2 ” N, 63 ° 27 ’ 03.6 ” W, 02. VIII. 2009 (1 ♀ MZUSP); Amazonas, Manaus, Reserva Ducke, Igarapé Acará, 01. VIII. 1985, 2323, E. Binda & L. Aquino col. (1 ♂, 1 ♀ MZUSP, 2 ♀ INPA); Amazonas, Manaus, Reserva Ducke, Igarapé Barro Branco, 20. III. 1984, 2 423, U. Barbosa col. (1 ♀ MZUSP); Pará, 1772, Rio Mapuera, Cachoeira do Engano, 15. VI. 1986, V. Py-Daniel & U. Barbosa col. (1 ♀ MZUSP). GUYANA: Region 6, Upper Berbice, Basecamp 2, bathing creek (upstream of camp), 4 ° 45 ' 18.0606 ", - 58 ° 0 ' 24.2382 ", 49 m, 30 Sep 2014, Short, Salisbury, La Cruz, stream margins, GY 14 - 0930 - 01 A (1 ♂, 1 ♀ UMC); Region 8, Upper Potaro Camp (c. 7 km NW Chenapau), Ridge Trail, 5 ° 0 ' 43.8006 ", - 59 ° 38 ' 57.9042 ", 585 m, 11 Mar 2014, Short, Baca, Salisbury, small marshy detrital stream, GY 14 - 0311 - 02 A (1 ♂, 1 ♀ UMC); Region 9, Parabara, elev 274 m, 2 ° 6 ' 29.52 ", - 59 ° 13 ' 39.183, 3 November 2013, Short, Isaacs, Salisbury / GY 13 - 1103 - 02 A, small flowing creek with sand / detritus margins & leaf packs / stick jams (2 ♂, 3 ♀ UMC). SURINAME: Sipaliwini, Raleighvallen Nature Reserve, Voltzberg Station, N 4.681833, W 56.185635, 78 m, 29 July 2012, Short, Maier, McIntosh, Kadosoe, SR 12 - 0729 - 02 A, stream margin (2 ♂, 1 ♀ UMC); Sipaliwini, Kutari River, 2 ° 10 ' 31.2594 ", - 56 ° 47 ' 14.6364 ", 228 m, 20 August 2010, SR 10 - 0820 - 01 A, Short & Kadosoe, forest stream (3 ♂, 3 ♀, 1 - 1 st instar, 1 - 2 nd instar, 1 - 4 th instar, 1 - 5 th instar UMC); Dutch Guiana, IV. 17. 1944, D. C. Geiskcs / Republiek Coropina Creek / Ambrysus usingeri La Rivers Allotype ♀ (1 ♀ SEMC); Museum Leiden, Suriname exp., 1948 - 1949, Republiek — Zanderij, kreekie bij km 43, spoorbaan, 4 - IX- 1948 (2 ♂, 1 ♀ EMEC). VENEZUELA: Amazonas, small stream 1 km N of Alto Mavaca base camp, 2 ° 1 ' 30 " N, 65 ° 7 ' 0 " W, 228 m., 22 ° C, 4 Feb 1989, CL 8006, DA Polhemus (1 ♂, 1 ♀ USNM).	en	Reynoso-Velasco, Daniel (2017): New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae). Zootaxa 4323 (4): 503-518, DOI: 10.11646/zootaxa.4323.4.4
