Eleothinus latus, Vlasak & Santos-Silva, 2022

Eleothinus latus View in CoL sp. nov.

( Fig. 15-21)

ZooBank:http://zoobank.org/ 05771F3B-B0AA-4651-9939-4D8994D30CF2

Holotype, ♂, ECUADOR, El Oro: Arenillas , <100 m, 4.VIII.2021, J. Vlasak leg. ( MZSP).

Paratypes

ECUADOR

– El Oro: 2 ♂ and 4 ♀, same data as holotype ( MZSP) ;

– 12 ♂ and 9 ♀, same data as holotype ( JVCO) .

– Loja: 17.5 km S Catamayo, 14 specimens, 22-24.II.2006, F. T Hovore & I. Swift leg. ( LGBC);

– 18.5 km N Gonzanama, 22.II.2006, F. T Hovore & I. Swift leg. ( LGBC). COSTA RICA

– Cartago: Turrialba , 1 ♂, 2.VIII.1973, R. Morales leg. ( FSCA, formerly ACMT) .

Description of the holotype ( Fig. 15-19)

Coloration. – Integument mostly dark brown; apex of maxillary palpomere IV, labialpalpomere III yellowish brown; anterior region of labrum reddishbrown; scape brown, slightly darkened apically; antennomeres III-IV reddish brown, with brown maculae interspersed, except dark-brown apex; antennomeres V- VII brown basally, dark brown apically, orangish brown on remainingsurface; antennomeresVIII-X blackish on basal and apical quarter, orangish brown on remaining surface; antennomere XI blackish on basal and apical third, brownish on central third. Pronotum with one large, oblique black macula on each side of center of anterior half, and black on center. Prosternal process reddish brown centrally. Femora mostly brown; tibiae brown (more dark reddish brown depending on light intensity) with two black rings, one on basal third, another on apical third; tarsi black.Apex of ventrites 1- 4 pale.

Head. – Frons densely, finely punctate; with dense dull yellowish-brown pubescence obscuring integument, except somewhat fragmented, wide Vshaped brown macula, from about middle to antennal tubercles; with one long, erect dark-brown seta close to eyes. Vertex and area behind upper eye lobes with dense dull yellowish-brown pubescence, except glabrous median groove and subtriangular brown pubescent macula close to prothorax on each side of central area of vertex; with one long, erect dark-brown seta close to upper eye lobes. Area behind lower eye lobes with dense pale-yellow pubescence close to eye, glabrous close to prothorax, pubescent area abruptly widened behind inferior third of eye. Genae with dense pale yellowish-brown pubescence, and a fewlong, erect dark-brown setae interspersed.Wide central area of postclypeus with dense, bristly pale yellowish-brown pubescence, pubescence longer centrally; with one very long, erect black seta interspersed on each side. Sides of postclypeus glabrous. Labrum with dense, long, dull 6. A. rogueti sp. nov., holotype, apex of antennomere III.

7 -8. A. cinerascens (Bates, 1864) , Brazil, Amazonas (Tapuruquara). 7. Dorsal habitus. 8. Prosternal and mesoventral processes.

9 -10. A. lignarius (Bates, 1864) , Brazil, Espírito Santo, Linhares. 9. Dorsal habitus. 10. Prosternal and mesoventral processes.

11 -12. A. remissus (Erichson, 1847) , Ecuador, Zamora-Chinchipe, Cumbaratza. 11. Dorsal habitus. 12. Prosternal and mesoventral processes. 13- 14. A. irrorellus Bates, 1885 , Ecuador, Manabí. 13. Dorsal habitus. 14. Prosternal and mesoventral processes.

yellowish-brown pubescence almost entirely obscuring integument, and long erect black setae transversely interspersed on posterior half; anterior margin with fringe of dense yellowish-brown setae. Gulamentum smooth, glabrous, except depressed anterior region with sparse dull yellowish-brown pubescence. Distance between upper eye lobes 0.22 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.53 times distance between outer margins of eyes. Antennae 2.15 times elytral length, reaching elytral apex at apex of antennomere VI. Scape with dense yellowish-white pubescence and brownish pubescent maculae interspersed, except base with brownish pubescence, dorsal apex with dark-brown pubescent macula, and sides of apex with dull yellowish-brown pubescence. Pedicel with dull yellowish-brown pubescence basally, dark brown on remaining surface. Antennomeres III-IV with dense yellowish-white pubescence and areas with sparse pubescence interspersed, except apex with dark-brown pubescence. Antennomeres V- XI with dense blackish pubescence on black blackish area, yellowish brown on remaining surface.

Antennal formula based on length of antennomere III:

– Scape = 0.94. – Pedicel = 0.12. – IV = 0.96. – V = 0.80. – VI = 0.62. – VII = 0.56. – VIII = 0.53. – IX = 0.50. – X = 0.50. – XI = 0.48.

Thorax. – Prothorax wider than long; anterior basal constriction well marked; sides divergent from basal constriction to lateral tubercles, subparallel-sided from lateral tubercles to posterolateral angles; lateral tubercles located on posterior third. Pronotum with one elongate, oblique gibbosity on each side of anterior half, fused anteriorly (corresponding to the black oblique maculae); posterior quarter widely transversely sulcate; abundantly, coarsely punctate, punctures coarser on posterior quarter, sparser anteriorly on gibbosities; sides with dense whitish pubescence, except dull yellowish-brown pubescence behind lateral tubercles of prothorax; central region mostly with dense, dull yellowish-brown pubescence except blackish pubescence on gibbosities and center of posterior half (with dull yellowish-brown pubescence close to posterior margin on center of blackish pubescence); with a few long, erect dark setae on sides of posterior quarter. Sides of prothorax abundantly, coarsely punctate; with dense dull yellowish-brown pubescence, except whitish pubescence close to pronotum, between anterior margin and lateral tubercle. Prosternum with dense dull yellowish-brown pubescence laterally, slightly less dense centrally. Prosternal process with dense dull yellowish-brown pubescence; narrowest area 0.52 times procoxal width. Mesanepisternum, mesepimeron, and sides of mesoventrite with dense dull yellowish-brown pubescence; remaining surface of mesoventrite and mesoventral process with sparser dull yellowish-brown pubescence. Anterior margin of mesoventral process abruptly elevated from mesoventrite; sides strongly convergent toward near apex, where it is distinctly widened; posterior margin concave; narrowest area 0.7 times mesocoxal width. Sides of ventral surface of mesothorax with dense due yellowish-brown pubescence, slightly lighter and less dense on center of metaventrite. Scutellum with triangular yellowish-brown pubescent macula on center of basal third, yellowish-white pubescent band on remaining central area, yellowish-brown pubescence on sides of posterior 3/4 and remaining apex, blackish pubescence on sides of anterior quarter, and brown pubescence on remaining surface.

Elytra. – Abundantly, coarselypunctate; centrobasal crest slightly elevated, with dense, erect black setae; dorsal surface with three slightly elevated longitudinal carinae; obliquely depressed on sides of basal third of dorsal surface; suture carina-shaped from middle to apex; apex slightly oblique and slightly concave; with sparse, small tufts of bristly black setae between centrobasal crest and suture, on longitudinal carina and suture, except on posterior quarter; with narrow black pubescent band surrounding scutellum; with both white and dull yellowish-brown wide pubescent band surrounding black pubescent band close to scutellum;remaining surface mostly withdense dull yellowish-brown pubescence, lighter on posterior third, except: oblique yellowish-brown pubescence macula behind centrobasal crest; irregularwhite pubescent macula on center of dorsal surface of anterior half; narrow white pubescent band close to suture, starting on anterior fifth, oblique from middle to center of dorsal surface on posterior third, zigzag shaped from this area to lateral curvature of elytra; with small dark-brown pubescent spots interspersed, especially close to suture.

Legs. – Femora with dense yellowish-white pubescence, with dull yellowish-brown pubescence, and small areas with sparser brown pubescence interspersed. Protibiae with dense, light dull yellowish-brown pubescence interspersed dorsally, laterally, and on basal third of ventral surface, except dark rings withdark-brown pubescence;remainingventral surface with dense, bristly dark-brown pubescence, except inner margin of apical third with fringe of yellowish-brown pubescence. Mesotibiae with dense yellowish-white pubescence with dull yellowish-brown pubescence interspersed, except anterior dark area with dark-brownpubescence, posterior dark area withabundant, short, thick black setae and ventral surface of posterior half with bristly yellowish-brown pubescence.Metatibiaewithdense yellowish-white pubescence with dull yellowish-brown pubescence interspersed, except dark areas with dark-brown pubescence and ventral surface of posterior half with bristly yellowish-brown pubescence. Tarsomeres I- II with dense white pubescence dorsally, almost entirely covering protarsomeres, and covering basal half of meso- and metatarsomeres; remaining surface of dorsal surface of tarsomeres I- II with dense black pubescence; tarsomeres III with sparse white pubescence basally and sparse black pubescence on remaining surface; tarsomeres IV with sparse blackish pubescence; tarsomeres V with abundant white pubescence on basal half and blackish pubescence on apical half; tarsomeres I-III with long, erect black setae interspersed laterally; tarsomere V with long, erect black setae on apical half;metatarsomere V as long as II-III together.

Abdomen. – Ventrites with dense yellowish-white pubescence almost obscuring integument; apex of ventrite V subtruncate.

Female ( Fig. 20 -21). Similar to males, differing by antennae slightly shorter, 2.0 times elytral length (antennae measured only in one female paratype), and by ventrite 5 longer, subtriangularly shaped, with narrow longitudinal glabrous band on middle of basal half, apex shallowly concave.

Variations. – Antennomeres III - VIII with light central area brown or brownish; light area of antennomeres IX-X reddish brown; pronotum without black maculae;black macula on each side of central area of the pronotum surpassing middle, almost straight from middle; area with sparse pubescence on each side of middle almost longitudinal, from anterior fifth to posterior quarter; in several of the specimens the epipleural region has an elongate area with very thin or no pubescence and so appears as a blackish stripe on the dorsal half.These specimens are from the exact same location as specimens with this region containing mottled pubescence as in the holotype; mesoventral process dark brown; pubescence on frons, vertex, and area behind upper eye lobes yellowish brown; pubescence behind lower eye lobes yellowish white or light yellowish brown; posterior half of pronotum with dense brown pubescence following the black pubescence on gibbosities; blackish pubescence on gibbosities of pronotum often bristly; posterior third of elytra with large white pubescent area, especially, laterally; anterior half of elytra with wide, longitudinal white pubescent band on dorsal surface, from anterior fifth to zigzag-shaped white pubescent band; white pubescent band on elytral suture absent.

Dimensions (mm) (Holotype ♂ / paratypes ♂ (3) / paratypes ♀ (4)). – Total length, 5.85/5.95- 6.55/5.70 -6.75;

– Prothoracic length, 1.10/1.15- 1.40/1.10-1.30;

– Anterior prothoracic width, 1.40/1.35 -1.45/1.30- 1.45;

– Posterior prothoracic width, 1.60/1.55- 1.70/1.50-1.85;

– Maximum prothoracic width, 2.00/1.90-2.00/1.75- 2.10;

– Humeral width, 2.35/2.25- 2.55/2.15-2.75;

– Elytral length, 4.25/4.25-4.70/4.10- 5.05.

Only the specimens belonging to the MZSP and FSCA collections were measured. No reliable difference was found in the specimens from the JVCO collection.

Etymology. – The specific epithet “latus ” (Latin, meaning wide) refers to the broad body of this species, in relation to the other species in the genus.

Remarks.

– Eleothinus latus sp. nov. is similar to E. abstrusus Bates, 1881 ( Fig. 22-23), but differs by the body stouter ( Fig. 15, 20); prosternal process wider in both sexes ( Fig. 16, 21), narrowest area about 0.5 times procoxal width. In E. abstrusus , the body is proportionally slender ( Fig. 22; see also photographs on 15. Dorsal habitus. 16. Ventral habitus. 17. Lateral habitus. 18. Head, frontal view. 19. Centrobasal crest of the elytra. Bezark 2022), and the prosternal process is narrower, narrowest area about 0.4 times procoxal width.

– It differs from E. longulus Bates, 1881 (see photographs on Bezark 2022), especially by the body distinctly stouter, and the elytra proportionally shorter (body slender and elytra proportionally longer in E. longulus ).

– Eleothinus latus sp. nov. differs from E. pygmaeus Bates, 1885 by the elytra without large dark macula on sides (present in E. pygmaeus ), and without longitudinal white pubescent bands fused posteriorly (present in E. pygmaeus ).