Delteredolaemus hei Li & Huang & Cai 2022, sp. nov.
Creators: name: Li, Yan-Da
name: Huang, Di-Ying
name: Cai, Chen-Yang
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Teredidae
Delteredolaemus
Delteredolaemus hei

description: Delteredolaemus hei Li & Cai sp. nov.
Figs 1–17
https://zoobank.org/ 30C72903-95AF-4730-AC7A-CD6298FDE330
Material. Holotype, NIGP200000.
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; Shi et al. 2012, Mao et al. 2018).
Diagnosis. As for the genus.
Description. Body elongate, cylindrical, about 1.75 mm long, 0.45 mm wide, widest in anterior part of abdomen; surface with scattered setae.
Head (Fig. 7) prognathous, widest across the eyes. Compound eyes (Fig. 7) finely facetted, without interfacetal setae. Antennal insertions (Fig. 16) exposed from above. Antennae (Figs 7, 17) likely 11-segmented; antennomere 1 robust; antennomeres 1–4 progressively narrower; antennomeres 10 and 11 forming a relatively compact club; antennomeres 1–9 with scattered long setae only; antennomere 11 with dense sensorial setae. Mandibles (Fig. 7) (at least) bidentate. Maxillary palps (Fig. 7) 4-segmented, with apical palpomere subconical. Labial palps (Fig. 7) with apical palpomere likely cylindrical.
Pronotal disc about 1.4 times as long as wide; surface without special modifications (carinae, cavities, grooves, or paired impressions); posterior pronotal edge posteriorly produced at middle, forming rather distinct angle (Fig. 12); lateral pronotal carinae complete (Fig. 15). Notosternal suture complete (Fig. 15). Prosternal process either absent or completely concealed by projecting procoxae (Fig. 8). Procoxae (Fig. 8) projecting and contiguous (status of coxal cavities unknown).
Scutellar shield (Fig. 12) small and rounded. Elytra (Fig. 3) elongate; surface with clear puncture rows, without costae; scutellar striole absent; epipleura narrow. Mesoventrite (Fig. 9) without median carina; mesoventral process well-developed, slightly broadened at middle, apically narrowly rounded. Mesocoxal cavities narrowly separated (Fig. 9). Metaventrite anteromedially tumid (Figs 6, 9); median discrimen absent. Metacoxae (Fig. 10) transversely oval, narrowly separated.
Legs well-developed, slender. Trochanters large and well visible, with strongly oblique trochanterofemoral joint (Figs 8–10). Tibiae with spines present at outer apical angle only (Figs 8–10); tibial spurs 2-2-2, well-developed (Figs 8–10). Tarsi all 4-segmented; tarsomeres simple, unlobed (Figs 8–10). Pretarsal claws simple; empodium present, bisetose.
Abdomen with five ventrites (Figs 10, 11). Ratio of ventrite lengths along middle: 3.8:1.3:1.1:1.0:1.5. Ventrite 1 with intercoxal process narrow and apically acuminate (Fig. 10).
Etymology. The species is named after Mr. Hai-Kun He (Guangdong, China), who kindly donated many fossils for our research.
description: Published as part of Li, Yan-Da, Huang, Di-Ying & Cai, Chen-Yang, 2022, Earliest teredid beetle from mid-Cretaceous amber of northern Myanmar (Coleoptera: Coccinelloidea: Teredidae): new genus and species, pp. 1-9 in Zoologia (e 22042) (e 22042) 39 on page 2, DOI: 10.1590/S1984-4689.v39.e22042, http://zenodo.org/record/13173808