Microteroschema, Eya, 2024

Eya, Bryan K., 2024, Revision of trachyderines related to Sphaenothecus from North America with description of three new genera, and new species of Lophalia Casey, 1912, Mannophorus LeConte, 1854, and Ischnocnemis Thomson, 1864 (Coleoptera: Cerambycidae: Cerambycinae: Trachyderini), Insecta Mundi 2024 (61), pp. 1-94 : 78

Key to species of the genus Microteroschema , new genus

1. Each elytron with one, broad, raised ivory subsutural vitta ( Fig. 428–431 ).... M. parvum Eya , sp. nov.

— Each elytron with two ivory raised vittae, a broad subsutural vitta, and a narrower submarginal one ( Fig. 440–443 )................................................. M. pseudolaetum Eya , sp. nov.

Figures

Figures 428–439. Microteroschema parvum Eya, sp. nov., dorsal and lateral images: 428–429) Male, 9 mm, 13 km NW Ocozocoautla, Chiapas, MEX. 430–431) Female, 10 mm, 36 km E Tapantepec, Oaxaca, MEX. Head: 432–434) Front declivous, genae prominent, base of mandibles separated from anterior margin of lower eyes (red arrow), mandibles prominent extended forward. Pronotum: 435) Disc with sides shallowly rounded, apical margin unelevated, without collar-like projection on sides, integument black to dark brownish, and punctures shallow. Thorax lateral image: 436) Pronotal disc shallowly convex, mesosternal process non-protuberant (red arrow). Elytra: 437) Apices bi-emarginate truncate with sutural and exterior angle dentate. Metatarsi: 438) Male metatarsomeres short, tarsomere 1 (T1) subequal to or shorter (red brackets) than tarsomeres 2+3 (T2+3), T1/ T2+3: 0.88. 439) Female metatarsomeres shorter and broader than male, tarsomere 1 (T1) subequal to or shorter (red brackets) than tarsomeres 2+3 (T2+3), T1/ T2+3: 0.93.

Figures 440–458. Microteroschema pseudolaetum Eya sp. nov., dorsal and lateral images: 440–441) Female, 13 mm, 1.5 km W Chiapas border, Oaxaca, MEX. 442–443) Male, 13 mm, Hwy 195, 36 km S Jct 190, Chiapas, MEX. Head: 444–446) Female, front declivous, genae prominent, base of mandibles separated from margin of lower eyes (red arrow), mandibles extended forward, postclypeus with apical ¼ abruptly declivous (red arrow) or folded above anteclypeus (green arrow). 448–450) Male, frontal, lateral, and frontolateral profiles. Pronotum: 447, 451) Disc with sides shallowly rounded, apical margin unelevated without lateral collar-like projection on sides. Thorax lateral image: 452, 453) Pronotal disc shallowly convex, mesosternal process non-protuberant (red arrow). Elytra: 454) Female, elytral apices broadly rounded. 455–456) Male, elytra.Metatarsi:457) Female, Metatarsomeres stout, explanate, tarsomere 1 (T1) shorter (red brackets) than 2+3 (T2+3),