Cosmotomidius lubricus, Bezark & Santos-Silva, 2022

Cosmotomidius lubricus View in CoL sp. nov.

( Fig. 1-5)

ZooBank:http://zoobank.org/ D2B7C129-347D-48C5-81F2-9D2F4EF7D29D

Holotype, ♂, ECUADOR, Manabi: 5 km S Montecristi , 10.III.2006, F. T. Hovore & I. Swift leg. ( CAS).

Paratypes, 1 ♂ ( LGBC) , 1 ♂ ( MSZP) same data as holotype .

Description of the holotype ( Fig. 1- 5)

Coloration. – Integument mostly dark brown, almost black; ventral mouthparts dark yellowish brown, except pale-yellow apex of palpomeres and margins of some segments; anteclypeus dark yellowish brown posteriorly, fulvous anteriorly; labrum dark reddish brown posteriorly, yellowish brown anteriorly; scape and pedicel brown, slightly darker ventrally;antennomere III brownish, except dark-brown apex; antennomere IV reddish brown, except dark-brown apex; antennomeres V–XI orangish brown basally, slightly,

Reviewer s:

Julien Touroult (OFB, CNRS, MNHN, France) - ZooBank: http://zoobank.org/ DA01F641-8F8A-4465-89B5-EE847535D09C - Orcid: https://orcid.org/0000-0002-4619-5590

gradually darkened toward its apex, but the entire orangish-brown region gradually lighter toward XI, except brown apical region, this area gradually longer toward XI; gulamentum gradually yellowish brown toward prothorax. Scutellum black. Elytra gradually lighter toward apex, especially on posterior fifth. Tibiae dark orangish brown on wide central region, this area darker depending on light intensity.Tarsi mostly orangish brown.

Head. – Frons densely, finely punctate; inferior half and area close to eyes with abundant pale yellowish-brown pubescence not obscuring integument; superior half with abundant brown pubescence not obscuring integument; with a few long, erect white setae interspersed. Area between antennal tubercles with sparse fine punctures; with abundant brown pubescence not obscuring integument centrally, with whitish pubescence interspersed, brownish with yellowish-brown pubescence interspersed laterally; with long, erect white setae interspersed laterally. Area between posterior region of antennal tubercles and middle of upper eye lobes sparsely, finely punctate; with somewhat sparse, brownish and whitish pubescence, and a few long, erect white setae close to eyes. Remaining surface of vertex with abundant dark yellowish-brown pubescence laterally, partially obscuring integument, and whitish pubescence centrally, not obscuring integument, and a few long, erect white setae close to eyes. Area behind upper eye lobes with abundant yellowish-brown pubescence not obscuring integument close to vertex, dense, yellowish close to lower eye lobes. Area behind lower eye lobes with dense yellowish pubescence obscuring integument close to eye, this area widened toward ventral surface, and pubescence gradually yellowish white toward ventral surface; area close to prothorax glabrous; with long, erect white setae interspersed on pubescent area. Genae abundantly, finely punctate, except smooth apex; with somewhat dense yellowish-white pubescence close to eye, pubescence sparser and noticeably shorter and yellowish toward glabrous smooth area; with a few long, erect yellowish-white and white setae interspersed. Antennal tubercles moderately elevated; with dense brown pubescence, except yellow pubescence on anterior and posterior region of apex. Gulamentum smooth, glabrous, except intermaxillary process abundantly, finely punctate, with yellowish-brown pubescence not obscuring integument, and both short and long, erect yellowish-white setae interspersed. Wide central area of postclypeus with abundant pale yellowish-brown pubescence centrally, pubescence sparser laterally, and long, erect, both yellowish-white and white setae interspersed. Sides of postclypeus glabrous. Labrum coplanar with anteclypeus at posterior 2/3, with arched, irregular, transverse carina on center of this area, inclined at posterior third; with somewhat sparse yellowish-white pubescence on posterior 2/3, glabrous on anterior third; with long erect, yellowish on transverse central area, more abundant and longer laterally, erect setae appearing to be whiter or somewhat golden depending on light source. Distance between upper eye lobes 0.18 times distance between outer margins of eyes; in frontal view, distance between lower eye lobes 0.54 times distance between outer margins of eyes. Antennae 2.7 times elytral length, reaching elytra apex at basal quarter of antennomere VI. Scape sparsely, coarsely punctate; with dense yellowish-brown pubescence on dorsal base, abundant pale yellow pubescence not obscuring integument on remaining dorsal surface, pubescence yellower on some areas, and abundant yellowish-white pubescence on remaining surface, whiter on ventral surface; with long, erect white setae interspersed. Pedicel with abundant yellowish-brown pubescence basally, gradually sparser and paler toward apex; with a few long, erect white setae interspersed dorsally, and a few long, erect yellowish setae interspersed ventrally. Antennomeres III–IV with dense yellow pubescence basally, abundant yellowish-brown pubescence not obscuring integument on remaining dorsal surface, darker close to apex; sides and ventral surface with abundant whitish pubescence; with somewhat long, erect white setae interspersed dorsally, and long, erect yellowish setae interspersed ventrally; with somewhat short, erect dark reddish brown spine-shaped setae ventrally, darker apically. Antennomeres V–VI with dense yellowish-white pubescence basally, sparser on remaining surface; with short, erect yellowish-white setae interspersed dorsally, and long, erect yellowish setae interspersed ventrally; ventral apex with a few dark spine-shaped setae. Antennomeres VII–XI with dense yellowish-white pubescence on lighter area, sparser on remaining surface, and short, erect setae of same color interspersed; VII with a few long, erect yellowish setae interspersed ventrally.

Antennal formula based on length of antennomere III:

– Scape = 0.95. – Pedicel = 0.16. – IV = 1.34. – V = 1.11. – VI = 0.91. – VII = 0.82. – VIII = 0.75. – IX = 0.75. – X = 0.70. – XI = 0.67.

Thorax. – Prothorax wider than long; lateral tubercles large, smooth, conical, located centrally, with apex slightly directed backward; with narrow sulcus close to anterior margin. Pronotum with one large, elevated tubercle on each side of middle, with subrounded apex, and another small, slightly elevated tubercle on center of posterior half; anterior margin convex; posterior margin straight; abundantly, coarsely, deeply punctate between anterior margin and anterolateral tubercles, sparsely, coarsely punctate between anterolateral tubercles, and between them and lateral tubercles of prothorax, androw of very coarse and deep punctures near posterior margin; with dense yellowish-white pubescence laterally, more greenish-white depending on light intensity and source; with short yellowish-white pubescent band centrally close to anterior margin, this band partially surrounded laterally with yellowish-brown pubescence; with somewhat dense yellowish-white pubescence centrally, from middle to posterior margin, this area distinctly narrowed and with yellowish-brown pubescence on each side close to posterior margin; with somewhat sparse yellowish-white pubescence behind anterolateral tubercles; with somewhat abundant dark yellowish-brown pubescence surrounding the anterolateral tubercles, except dense, almost golden pubescence on apex of inner side of anterolateral tubercles and their glabrous apex; with a few long, erect white setae interspersed. Sides of prothorax with dense yellowish-white pubescence, more greenish-white depending on light intensity and source, pubescence less dense and whitish close to prosternum. Prosternum with dense whitish pubescence laterally, pubescence sparser, grayish-white on wide central area. Prosternal process with sides of central area slightly sinuous; narrowest area 0.4 times procoxal width; with grayish-white pubescence not obscuring integument basally, gradually sparser toward apex. Lateroinferior area of mesoventrite with dense greenish-white pubescence; remaining surface almost glabrous anterocentrally, and with somewhat sparse yellowish-white pubescence close to mesoventral process. Mesanepisternum, mesepimeron, metanepisternum, and sides of metaventrite with dense greenish-white pubescence; remaining surface of metaventrite with abundant whitish pubescence partially obscuring integument, except glabrous metathoracic discrimen, and yellowish pubescence on each side of posterior region. Mesoventral process moderately abruptly elevated basally; lateral margins somewhat elevated, making the surface concave; apex subtruncate, slightly projected laterally below mesocoxae; with abundant yellowish-white pubescence not obscuring integument. Scutellum with dense pale yellow pubescent band centrally, and dense black pubescence laterally.

Elytra. – Centrobasal crest gradually elevated from its anterior region, somewhat abruptly declivous at its apex; somewhat sparsely, coarsely punctate on anterior half, punctures gradually sparser and finer toward apex; apex spiniform on outer angle; with abundant, almost golden pubescence, except irregular areas with sparse, almost golden pubescence; whitish pubescence along suture; wide, oblique whitish pubescent band about middle, fused with pubescence along suture, narrowed toward lateralregion of dorsal surface; somewhat spare whitish pubescent band from anterior margin to centrobasal crest; three subelliptical dark brown pubescent macula close to inferior margin of oblique whitish pubescent band; subglabrous posterior region of centrobasal crest; withlong, erectboth blackish and white erect setae interspersed, white setae more abundant laterally and on apex, and blackish setae absent laterally.

Legs. – Mesocoxae with short, rounded projection under mesoventral process. Femora with dense greenish-white pubescence on dorsal surface and almost entire posterior third, whitish on remaining surface, except apex with longer yellowish pubescence; with long, erect white setae interspersed. Pro- and mesotibiae with dense greenish-white pubescence dorsally, except dorsal sulcus of mesotibiae with dense, thick, bristly, both dark brown and yellowish-brown setae, whitish laterally and basal 2/3 of ventral surface, and bristly, coarser yellowish-brown pubescence on apical third of ventral surface; with long, erect white setae interspersed and short, erect, spine-shaped dark setae on base and posterior half of dorsal surface. Metatibiae with dense whitish pubescence, except bristly yellowish pubescence on posterior third of ventral surface; with long, erect white setae interspersed, and short, erect, spine-shaped dark setae on base and posterior half of dorsal surface. Metatarsomere I slightly longer than II–III together.

Abdomen. – Ventrites with abundant grayish-white pubescence not obscuring integument, except fringe of yellowish pubescence on apex of ventrites 1–3, longer and denser laterally, and glabrous centroapical region of ventrite 4; with long, erect white setae interspersed on sides of ventrites 2–5, and a few long, erect white setae interspersed centrally on remaining surface of 4–5. Apex of ventrite 5 slightly rounded.

Variation. – Pronotum with dense yellowish-white pubescence throughout centrally, except the yellowish-brown and almost

1. Dorsal habitus. 2. Ventral habitus. 3. Lateral habitus. 4. Head and pronotum. 5. Head, pronotum, and base of the elytra, lateral view. golden pubescence surrounding anterolateral tubercles. Mesanepisternum, mesepimeron, metanepisternum, and sides of metaventrite with dense, shiny greenish-golden pubescence. Elytra with irregular, somewhat small or large, almost glabrous areas interspersed within golden pubescence.

Dimensions (mm) (holotype ♂ / paratypes ♂).

– Total length, 9.55/6.85–9.80;

– Prothoracic length, 2.10/1.45–2.10;

– Anterior prothoracic width, 2.35/1.65–2.30;

– Posterior prothoracic width, 2.15/1.50–2.15;

– Maximum prothoracic width, 3.00/2.05–2.90;

– Humeral width, 3.20/2.20–3.30;

– Elytral length, 6.35/4.50–6.50.

Etymology. – Thespecific epithet “ lubricus ” (Latin, meaning “slippery”) refers to the shining and smooth pronotal tubercles of this species.

Remarks. – Cosmotomidiuslubricus sp. nov. differs from C.nigrisetosus Touroult,Tavakilian&Dalens,2010 (see photographson Bezark2022a and original description), by the scape with long and erect white setae (dark in C.nigrisetosus ), elytra with both white and dark long erectsetae (onlydark setae in C.nigrisetosus ), and elytra with large central area with white pubescence (absent in C.nigrisetosus ). Itdiffers from C. elongatus Touroult,Tavakilian&Dalens,2010 (see photographsonBezark2022a and original description), by the pronotum with yellowish-brown and yellow pubescence aroundanterolateraltubercles(absentin centrobasal C. elongatus ),andcrestwithout long tuftof darksetae dorsally (present in C. elongatus ). The new species differs from C. morvanae Touroult, Tavakilian & Dalens, 2010 (see photographs on Bezark 2022a and original description), by the elytra with both white and dark long erect setae (only dark setae in C. morvanae ), and pronotum with yellowish-brown and yellow pubescence around anterolateral tubercles (absent in centrobasal C.morvanae ). Cosmotomidius lubricus sp. nov. differs from C. cacaoensis Touroult, Tavakilian & Dalens, 2010 (see photographs on Bezark 2022a and original description), by the pronotal tubercles smooth (with coarse punctures in C. cacaoensis ), presence of dense yellow pubescent macula close to anterolateral tubercles (absent in C. cacaoensis ), whitish pubescent area on center of the elytra larger,withits sides projected backward and reaching the area of the lateral curvature (smaller, with its apex transversely and triangularly projected toward middle of dorsal surface in C. cacaoensis ), and femora unicolorous (bicolorous in C. cacaoensis ). It differs from C. crudiaphilus Touroult, Tavakilian&Dalens,2010 ,by theshapeof thewhitishcentralarea of the elytra (in C.crudiaphilus , as in C.cacaoensis ),and bythe centrobasal crest elevated (slightly elevated in C. crudiaphilus . Finally it differs from C. egregius (Martins & Galileo, 2007) (see photographs on Bezark 2022a and original description), by the scape with conspicuous pubescence (inconspicuous in C. egregius ), maximum diameter of the antennomeres III and IV almost equal to distance between upper eye lobes (distinctly narrower in C. egregius ), and elytra with almost golden pubescence basally (absent in C. egregius ).

Cosmotomidius lubricus sp. nov. can be included in the alternative of couplet “7” from Touroult et al. (2010) (translated and modified):