Vetuprostomis angularis Li & Cai 2022, sp. nov.
Creators: name: Li, Yan-Da
name: Hsiao, Yun
name: Huang, Di-Ying
name: Cai, Chen-Yang
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Prostomidae
Vetuprostomis
Vetuprostomis angularis

description: Vetuprostomis angularis Li & Cai sp. nov.
(Figs 2–4)
Material. Holotype, NIGP177907.
Etymology. The specific name refers to its projected anterior pronotal angles.
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. Lateral sides of clypeus subparallel in anterior half (Fig. 4D). Left mandible with three apical teeth and two moderately separated teeth on incisor edge (Fig. 4D). Penultimate maxillary palpomere about as long as apical one (Fig. 4A,D). Jugal processes asymmetrical, comparatively long; right process longer than left one; inner sides with a tooth (Fig. 4A). Median groove of pronotum probably absent (Fig. 4E). Anterior angles of pronotum pointed (Fig. 4E).
Description. Body elongate and flattened, about 5.2 mm long, 1.3 mm wide.
Head (Fig. 3A,B) prognathous, constricted posteriorly, with distinct neck region. Temples distinctly projected posterolaterally. Eyes small, round and finely facetted, without interfacetal setae. Antennal insertions slightly concealed from above; subantennal grooves absent. Frontoclypeal suture not clearly discerned. Clypeus (Fig. 4D) with lateral sides subparallel (or weakly diverging) in anterior portion; anterior margin truncate. Labrum (Fig. 4D) narrowed anteriorly, apically truncate, with numerous elongate setae. Antennae 11-segmented, moniliform, with weak, 3-segmented club. Mandibles (Fig. 4D) tridentate apically; left mandible with two moderately separated teeth on incisor edge; right mandible with one blunt tooth on incisor edge. Maxillary palps (Fig. 4A) probably 4-segmented; palpomere 1 short; palpomere 2 elongate; palpomere 3 longer than wide, distinctly longer than half length of apical one. Mentum strongly transverse. Jugal processes (Fig. 4A) asymmetrical; inner sides with a tooth; right process longer than left one, strongly constricted above tooth; left process weakly constricted above tooth.
Pronotal disc (Fig. 4E) longer than wide; anterior angles pointed laterally; median groove not clearly discerned. Prosternal process (Fig. 4B) wide, expanding beyond procoxae and meeting broad postcoxal projections, apically truncate. Procoxal cavities (Fig. 4B) circular, widely separated. Elytra (Fig. 3C) about 2.2 times as long as width combined; surface with longitudinal carinae. Mesoventrite (Fig. 4C) relatively narrow. Mesocoxal cavities (Fig. 4C) moderately separated.
Legs (Fig. 4F) short. Femora distally with groove on inner side. Tibiae shorter than femora, widened apically with spinose outer apical angle; spurs large and stout, paired on all legs. Tarsi 4-4-4; tarsomeres simple, without ventral lobes. Pretarsal claws simple.
description: Published as part of Li, Yan-Da, Hsiao, Yun, Huang, Di-Ying & Cai, Chen-Yang, 2022, New species of Vetuprostomis from mid-Cretaceous amber of northern Myanmar (Coleoptera: Tenebrionoidea: Prostomidae), pp. 563-574 in Zootaxa 5125 (5) on pages 566-568, DOI: 10.11646/zootaxa.5125.5.6, http://zenodo.org/record/6457396