Ommatides nudus, Hoey-Chamberlain & Weirauch, 2019

Hoey-Chamberlain, Rochelle & Weirauch, Christiane, 2019, Taxonomic revision of the New World big-eyed minute litter bug genus Ommatides Uhler (Hemiptera: Schizopteridae), Zootaxa 4585 (1), pp. 73-99 : 82

Ommatides nudus sp. nov.

Figures 1–3 , 5–7 , 8–10

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Material. Type material. Holotype, male, slide-mounted in Canada balsam, ECUADOR: Orellana: Reserva Etnica Waorani , 1 km S. Onkone Gare Camp, Transect Ent., 0.65714°S 76.453°W, 216 m, 0 3 Oct 1996, T. L. Erwin et al., Fogging (ED_3542) (UCR_ENT 00025951) (USNM). Paratypes: ECUADOR: Napo: Huahua Sumaco, km 45 on Hollin-Loreto road, 0.74556°S 77.48694°W, 644m, 14 Dec 1989 – 22 Dec 1989, M.S. & J.S. Wasbauer, H. Real, Fogging, 1 point-mounted female (UCR_ENT 00036989) ( UCD) . Orellana: Reserva Etnica Waorani , 1 km S. Onkone Gare Camp, Transect Ent., 0.65714°S 76.453°W, 216 m, 0 2 Oct 1996, T. L. Erwin et al., Fogging, 1 female slide-mounted in Canada balsam (ED_3543) (UCR_ENT 00025952) ( USNM) .

Diagnosis. Recognized among species of Ommatides by both males and females being macropterous; and by males with dorsally expanded 1st labial segment lacking setae and the 4th labial segment unarmed. This is the only known species of Ommatides without labial armature.

Description. Male: macropterous with large membrane reaching tip of abdomen; total body length: 1.46 mm; body elongate ovoid. COLORATION: head, pronotum, and forewing brown; labium light to dark brown; forewing light to dark brown, with pale transverse band proximally; scutellum dark brown; legs mostly yellow with black tarsi; and genital capsule and genitalia dark brown ( Fig. 1 ). SURFACE AND VESTITURE: lobes of dorsally expanded 1st labial segment without setae; forefemur anteriorly with row of 6 small spicules and 1 anterior, long, stout seta; 2nd tarsomere of hind leg with 2 stout setae anteroventrally. STRUCTURE. HEAD: disc declivous; 1st labial segment dorsally expanded; 2nd, 3rd and 4th labial segments approximately of equal length. THORAX: ratio of pronotal collar length to pronotum length 0.20; collar depressed below rest of pronotum ( Fig. 1 ); postnotum rounded; posterolateral margin of pronotum deeply and narrowly concave; ratio of height of forefemur to length of forefemur 0.18; tarsal formula 3-3-3; ratio of length of hind tibia to width of pronotum 1.17; venation of macropterous forewing as in Fig. 7 ; tc almost squared anteriorly; rc, dc, and cub long and thin; Cu straight; An1 fusing with Cu proximal to wing margin. ABDOMEN AND GENITALIA: as in genus description ( Fig. 9 A,B ), with spiracle 8 set upon membranous tubercle of tergum 8 process and hidden below large patch of thick, dense setae ( Fig. 6 ).

Female: macropterous with large membrane reaching tip of abdomen; total body length: 1.48 mm; body elongate ovoid. COLORATION: as in male. SURFACE AND VESTITURE: labium as in generic description; forefemur anteriorly without spicules and with a single long, stout seta; 2nd tarsomere of hind leg with 2 stout seta anteroventrally. STRUCTURE. HEAD: as in male, with 1st labial segment not expanded and unarmed. THORAX: ratio of pronotal collar length to pronotum length unknown (because of specimen orientation); collar depressed below rest of pronotum ( Fig. 1 ); postnotum rounded; posterolateral margin of pronotum deeply and narrowly concave; ratio of height to length of forefemur 0.21; tarsal formula 2-2-3; ratio of length of hind tibia to width of pronotum 1.16; venation of macropterous forewing as in male. ABDOMEN AND GENITALIA: as in genus description ( Fig. 9 C,D ).

Etymology. From Latin nudus (adjective) meaning “smooth” or “bare”. Named for the lack of setae on the dorsally expanded 1st labial segment in the male.

Distribution. Known from two low elevation sites in Ecuador.

Macrohabitat and Collecting method: Terre firme forest and Tropical rainforest; Fogging.

Figures

FIGURE 1. Dorsal habitus images of Ommatides spp. males and females.

FIGURE 2. Lateral habitus images of Ommatides spp. males and females. Black arrows pointing our 4th labial segment processes (O. duodentis male, O. tridentis male) and sparse setation of foretibia (O. nudus male)

FIGURE 3. Ventral habitus images of Ommatides males and females. Black arrow pointing our 4th labial segment processes (O. duodentis male).

FIGURE 5. Labial structures of Ommatides spp. males in frontal view. Shading indicating degree of sclerotization. bubuccula; ca—conjunctival appendage; cly—clypeus; els—enlarged labial segment; mdpl—mandibular plate; mxpl—maxillary plate; proc—process; set—setae; spn—spine

FIGURE 6. Male genitalia of Ommatides spp.in dorsal view. Arrow indicating location of (or estimation of) abdominal spiracle 8 on tergum 8 process. ano—anophore; anop—anophoric appendage; at—anal tube; ca—conjunctival appendage; lpleft paramere; rp—right paramere; s9—sternum 9; t8—tergum 8; t8p—tergum 8 process; v—vesica.

FIGURE 7. Forewing of Ommatides spp. for males of all and females of selected species. An1—1st anal vein; An2—2nd anal vein; ac—anal cell; bc basal cell; Cu—cubital vein; cub—cubital cell; dc—discal cell; M—media; R—radius; R1—1st branch of radius; R2—2nd branch of radius; R3—3rd branch of radius; rc1-3—radial cells along costal margin; Sc—subcosta; sccsubcostal cell; tc—trapezoidal cell; wc—wing coupling organ.

FIGURE 8. Forewing of Ommatides spp. for males of all and females of selected species. An1—1st anal vein; An2—2nd anal vein; ac—anal cell; bc—basal cell; Cu—cubital vein; cub—cubital cell; dc—discal cell; M—media; R—radius; R1—1st branch of radius; R2—2nd branch of radius; R3—3rd branch of radius; rc1-3—radial cells along costal margin; Sc—subcosta; scc—subcostal cell; tc—trapezoidal cell; wc—wing coupling organ.

FIGURE 9. Male and female genitalic features of selected species of Ommatides. (A) Ommatides duodentis sp. nov.: male genitalia in dorsal perspective (ED_3548; UCR_ENT 00100847); (B) Ommatides nudus sp. nov.: male genitalia in ventral perspective (ED_3542; UCR_ENT 00025951); (C) Ommatides parvidentis sp. nov.: female genitalia in dorsal perspective (ED_4109; UCR_ENT 00098890); (D) Ommatides nudus sp. nov.: female genitalia in lateral perspective (ED_3543; UCR_ENT 00025952). ano—anophore; anop—anophoric appendage; ag—anterior gonapophysis; at—anal tube; caconjunctival appendage; g—gonoplacs; lp—left paramere; pg—posterior gonapophysis; rp—right paramere; s7—sternum 7; s8—sternum 8; s9—sternum 9; spgd—spermathecal gland duct; spgl—spermathecal gland; spr—spermathecal reservoir; spth—spermatheca; st—styloid; t 7, 8, 9—tergum 7, 8, 9; t8p—tergum 8 process; t10—tergum 10; t10p—process of tergum 10; v—vesica.

FIGURE 10. Map of all species of New World Hypselosomatinae currently captured in the AEC database. Species of Ommatides are indicated by colored stars, females of Ommatides not identified to species by colored rectangles. Specimen records for the remaining genera of New World Hypselosomatinae, Glyptocombus, Hypselosomops, and Hypsohapsis, are shown as greyscale symbols.