Carinibipogonia xiai Li, Kundrata & Cai, 2022

Li, Yan-Da, Kundrata, Robin, Huang, Di-Ying & Cai, Chen-Yang, 2022, First Artematopodidae from mid-Cretaceous amber of northern Myanmar (Coleoptera: Elateroidea), Zootaxa 5129 (2), pp. 257-271 : 265

Carinibipogonia xiai Li, Kundrata & Cai sp. nov.

( Figs 8–10 )

Material. Holotype, female, NIGP179432 ( NIGP).

Etymology. The species is named after Mr. Fang-Yuan Xia, who kindly allowed us to study many valuable fossil specimens in his collection.

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. As for the genus.

Description. Body moderately broad, 4.4 mm long, 1.7 mm wide; surface punctate.

Eyes well-developed, without interfacetal setae. Antennal insertions dorsally exposed. Subantennal groove absent. Frontoclypeal suture absent; anterior clypeal margin multidentate. Antennomeres 2–4 simple; antennomere 5 moderately serrate; antennomeres 6–10 strongly serrate, about as long as wide. Mandibles with one apical and one subapical teeth. Maxillary palps 4-segmented; apical palpomere seemingly cylindrical, not clearly expanded apically. Labial palps 3-segmented; apical palpomere widened apically. Mentum subtriangular, apically slightly emarginate.

Pronotal disc subtrapezoidal, widest at base; surface without transverse groove. Prosternum in front coxae transverse, with paired incomplete ridges; ridges not extending to anterior half of prosternum; deep pits absent; prosternal process with subparallel sides. Procoxal cavities broadly open posteriorly.

Elytra elongate; surface of each elytron with 10 puncture rows; epipleura developed only in anterior third.

Legs slender; tibiae slightly longer than respective femora, with two tibial spurs; tarsomeres 1 and 5 elongate; tarsomeres 3 and 4 with well-developed, bilobed membranous ventral process. Pretarsal claws simple.

Hind wing well-developed. Radial cell elongate, about 4.2 times as long as wide; inner posterobasal angle almost right.

Abdominal ventrites with margins denticulate. Sutures between all ventrites complete and distinct; suture between ventrites 4 and 5 only weakly curved. Ventrite 5 about 1.3 times as long as ventrite 4 (might be affected by distortion).

Figures

FIGURE 8. General habitus of Carinibipogonia xiai Li, Kundrata & Cai sp. nov., holotype, NIGP179432, under incident light. A, Dorsal view. B, Ventral view. Scale bars: 1.5 mm.

FIGURE 9. Details of Carinibipogonia xiai Li, Kundrata & Cai gen. et sp. nov., holotype, NIGP179432, under widefield fluorescence. A, Head and prothorax, dorsal view. B, Head and prothorax, ventral view. C, Hind wing, dorsal view. D, Abdomen, ventral view. E, Elytron, ventral view.Abbreviations: an, antenna; el, elytron; lbp, labial palp; md, mandible; mt, mentum; mxp, maxillary palp; pn, pronotum; ps, prosternum; ptb, protibia; R, radial cell; v1–5, ventrites 1–5. Scale bars: 500 μm.

FIGURE 10. Details of Carinibipogonia xiai Li, Kundrata & Cai gen. et sp. nov., holotype, NIGP179432, under confocal microscopy. A, Head, ventral view. B, Prothorax, ventral view, showing the paired longitudinal ridges (arrowhead). C, Fore and mid legs. D, Elytral apex, showing the interlocking tongue (arrowhead). E, Abdominal apex, ventral view. F, Head, dorsal view. G, Antenna, dorsal view. H, Elytron, dorsal view. I, Ovipositor, dorsal view. Abbreviations: a1–11, antennomeres 1–11; cl, clypeus; gs, gonostylus; lbp, labial palp; md, mandible; mstb, mesotibia; msts, mesotarsus; mt, mentum; ps, prosternum; ptb, protibia; pts, protarsus; v5, ventrite 5. Scale bars: 300 μm.