Eucinetus debilispinus Li & Cai 2024, sp. nov.
Creators: name: Li, Yan-Da
name: Engel, Michael S.
name: Huang, Di-Ying
name: Cai, Chen-Yang
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Eucinetidae
Eucinetus
Eucinetus debilispinus

description: Eucinetus debilispinus Li & Cai sp. nov.
(Figs 1–4)
Material. Holotype, NIGP203939, male.
Etymology. The specific name refers to its relatively small mesotibial spurs.
Locality and horizon. Amber mine located near Noije Bum Village, Tanai Township, Myitkyina District, Kachin State, Myanmar; unnamed horizon, mid-Cretaceous, Upper Albian to Lower Cenomanian.
Diagnosis. Labrum emarginate (Fig. 3A). Apical maxillary palpomere narrow and symmetrical, apically acute (Fig. 3A,B). Antennomere 3 about 0.70 times as long as 4 (Fig. 3A); antennomere 11 about 2.7 times as long as wide (Fig. 3C). Elytra about 1.8 times as long as combined width. Hind wings present. Metanepisternum at least twice as long as wide (Fig. 3D). Meso- and metatibiae at most with only one or two spines along outer edge (Figs 2B,C, 3E). Mesotibial spurs small; the smaller one not distinctly stouter than spines along apical fringe of mesotibia (Fig. 3E). Parameres distinctly bowed outwardly (Fig. 3I).
Description. Body fusiform and slender, about 1.7 mm long, 0.8 mm wide; surface with fine short setae.
Head deflexed against ventral side of prothorax; entirely concealed from above by pronotum. Compound eyes weakly emarginate anteriorly, with interfacetal setae. Antennae 11-segmented, filiform; antennomere 2 elongate; antennomeres 3–10 slightly longer than wide, somewhat submoniliform; antennomere 3 about 0.70 times as long as 4, distinctly narrower than 4; antennomere 11 about 2.7 times as long as wide, with distinct pattern of sensillae (Fig. 3C). Frontoclypeal suture straight anteriorly and with distinct anterolateral angles. Labrum weakly narrowed toward apex, apically emarginate. Mouthparts non-suctorial. Apical maxillary palpomere narrow and symmetrical, apically acute.
Prothorax widest at base. Lateral pronotal carinae complete, simple. Pronotal disc simple. Procoxae obliquely oriented, well-projecting, narrowly separated. Scutellar shield triangular, possibly with acute apex. Elytra about 1.8 times as long as combined width; transversely strigulate; sutural stria present; epipleuron narrow, incomplete. Hind wings present. Metanepisternum at least twice as long as wide. Metacoxae contiguous; metacoxal plates well-developed and greatly enlarged.
Mid and hind legs with fringe of spines at apices of tibiae and tarsomeres; fore legs without apical fringes of spines. Meso- and metatibiae at most with only one or two spines along outer edge. Mesotibial spurs small; the smaller one not distinctly stouter than spines along apical fringe of mesotibia. Tarsi 5-5-5, simple. Meso- and metapretarsal claws with accessory lobes (Fig. 3F).
Abdomen with six ventrites. Aedeagus of trilobate type; penis shorter than parameres; parameres distinctly bowed outwardly.
description: Published as part of Li, Yan-Da, Engel, Michael S., Huang, Di-Ying & Cai, Chen-Yang, 2024, Three new species of the extant genus Eucinetus from mid-Cretaceous amber of northern Myanmar (Coleoptera: Eucinetidae), pp. 214-230 in Zootaxa 5492 (2) on pages 218-220, DOI: 10.11646/zootaxa.5492.2.4, http://zenodo.org/record/13219234