Prostomidae, Thomson, 1859

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), Zootaxa 5125 (5), pp. 563-574 : 565

Key to extant and extinct genera of Prostomidae

1. Temples not prominent; neck region indistinct (e.g., fig. 1 in Ito & Yoshitomi 2017a). Mandibles elongate; incisor edge with many teeth (fig. 32 in Schawaller 1991). Jugular processes (anteriorly produced genae) elongate, usually as long as mandibles (fig. 2 in Ito & Yoshitomi 2017a).......................................................... Prostomis Latreille

- Temples distinctly projected posterolaterally; neck region distinct ( Figs 1D,E , 3A,B , 7B ). Mandibles short; incisor edge with 1–2 teeth ( Figs 1E , 3D , 7H ). Jugular processes shorter ( Figs 1D , 3B , 7A )......................................... 2

2. Temporal projections large, broadly rounded ( Fig. 1D,E ). Pronotum with sides gradually converging anteriorly in anterior half ( Fig. 1A,B )............................................................................. Dryocora Pascoe

- Temporal projections weaker and sharper ( Figs 3A,B , 7B ). Pronotum with sides subparallel or weakly converging posteriorly ( Figs 2 , 5 )................................................................ Vetuprostomis Engel & Grimaldi

Figures

FIGURE 1. Extant Dryocora spp., deposited in Australian National Insect Collection. A, Dryocora walkeri, dorsal view. B–E, Dryocora howitti. B, Habitus, dorsal view. C, Habitus, ventral view. D, Head, ventral view. E, Head, dorsal view. Scale bars: 2 mm in A–C, 500 μm in D–E.

FIGURE 2. General habitus of Vetuprostomis angularis Li & Cai sp. nov., holotype, NIGP177907, under incident light. A, Dorsal view. B, Ventral view. Scale bars: 1.5 mm.

FIGURE 3. Vetuprostomis angularis Li & Cai sp. nov., holotype, NIGP177907, under widefield fluorescence. A, Head and prothorax, dorsal view. B, Head and prothorax, ventral view. C, Elytral apex, dorsal view. D, Pterothorax, ventral view. E, Abdomen, ventral view. Abbreviations: an, antenna; el, elytron; jp, jugular process; md, mandible; msf, mesofemur; msts, mesotarsus; msv, mesoventrite; mtf, metafemur; mttb, metatibia; mtts, metatarsus; mtv, metaventrite; mxp, maxillary palp; pf, profemur; pn, pronotum; ps, prosternum; ptb, protibia; pts, protarsus. Scale bars: 500 μm.

FIGURE 5. General habitus of Vetuprostomis gaoi Li & Cai sp. nov., holotype, NIGP177908, under incident light. A, Dorsal view. B, Ventral view. Scale bars: 1.5 mm.

FIGURE 7. Vetuprostomis gaoi Li & Cai sp. nov., holotype, NIGP177908, under confocal microscopy. A, Mouthparts, ventral view. B, Temporal projection (arrowhead), ventral view. C, Prothorax, ventral view. D, Fore leg. E, Mesothorax, dorsal view. F, Hind leg. G, Abdomen, ventral view. E, Mouthparts, dorsal view. F, Elytral apex, dorsal view. Abbreviations: cl, clypeus; el, elytron; ey, compound eye; jp, jugular process; lb, labrum; lbp, labial palp; md, mandible; msv, mesoventrite; mt, mentum; mtf, metafemur; mttb, metatibia; mtts, metatarsus; mxp, maxillary palp; pc, procoxa; pf, profemur; ps, prosternum; ptb, protibia; ptc, protrochanter; pts, protarsus; v1–5, ventrites 1–5. Scale bars: 200 μm.