Bipogonia trivialis 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 : 259-261

Bipogonia trivialis Li, Kundrata & Cai sp. nov.

( Figs 1–4 )

Material. Holotype, sex unknown, NIGP179428 ( NIGP). Two paratypes, sex unknown, NIGP179429 , NIGP179430 ( NIGP).

Etymology. The specific name refers to its relatively common occurrence.

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. Body approximately 2.6 times as long as wide (versus 2.1 times as long as wide in Bipogonia fortis sp. nov.). Prosternum moderately broad, about 1.2–1.3 times as wide as long (versus 1.7 times as wide as long in B. fortis sp. nov.). Metaventral discrimen distinct only posteriorly ( Figs 3E , 4B ).

Description. As for the genus, except for the following characters: Body moderately broad, 4.4–4.6 mm long, 1.7–1.8 mm wide. Eyes well-developed, without interfacetal setae. Prosternum moderately broad. Surface of elytron with 10 puncture rows. Mesocoxal cavities separated by about twice the shortest diameter of coxal cavity. Metaventral discrimen distinct only near posterior end, not clearly visible anteriorly.Abdominal ventrite 5 about 1.7 times as long as ventrite 4.

Figures

FIGURE 1. General habitus of Bipogonia trivialis Li, Kundrata & Cai gen. et sp. nov., holotype, NIGP179428, under incident light. A, Dorsal view. B, Ventral view. Scale bars: 1.5 mm.

FIGURE 2. General habitus of Bipogonia trivialis Li, Kundrata & Cai gen. et sp. nov., holotype, NIGP179428, under widefield fluorescence. A, Dorsal view. B, Ventral view. Scale bars: 1.5 mm.

FIGURE 3. Details of Bipogonia trivialis Li, Kundrata & Cai gen. et sp. nov., holotype, NIGP179428, under confocal microscopy. A, Head, ventral view. B, Prothorax, ventral view. C, Mesothorax, ventral view. D, Mid leg. E, Metathorax and abdominal base, ventral view. F, Elytral and abdominal apices, showing the interlocking tongue (arrowhead). G, Head, dorsal view. H, Pronotum and antenna, dorsal view. I, Elytron, dorsal view.Abbreviations: a1–11, antennomeres 1–11; cl, clypeus; ep, elytral epipleuron; ey, compound eye; md, mandible; mstb, mesotibia; msts, mesotarsus; msv, mesoventrite; mt, mentum; mtc, metacoxa; mttc, metatrochanter; mtv, metaventrite; pn, pronotum; ps, prosternum; ptb, protibia; pts, protarsus; v1–5, ventrites 1–5. Scale bars: 300 μm.

FIGURE 4. Bipogonia trivialis Li, Kundrata & Cai gen. et sp. nov., paratypes. A, B, NIGP179429, under incident light. A, Dorsal view. B, Ventral view. C, D, NIGP179430, under widefield fluorescence. C, Head, dorsal view. D, Elytral apices, dorsal view. Scale bars: 1 mm.