Khasurtyphilus Lyubarsky & Perkovsky, 2025

Lyubarsky, Georgy Yu., Vasilenko, Dmitry V., Legalov, Andrei A. & Perkovsky, Evgeny E., 2025, New pleasing fungus beetle genus and species (Coleoptera: Erotylidae) from the Khasurty locality (Lower Cretaceous of Western Transbaikalia, Russia), Zootaxa 5715 (1), pp. 267-271 : 268

Genus Khasurtyphilus Lyubarsky & Perkovsky , gen. nov.

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Type species: Khasurtyphilus storozhenkoi Lyubarsky, Vasilenko, Legalov & Perkovsky , sp. nov. (by the present designation).

Diagnosis. Temples present ( Figs 1 , 10 ). Compound eyes without interfacetal setae ( Fig. 3 ). Antenna 11- segmented, antennal club 3-segmented ( Figs 2, 3 , 5 ). Subantennal grooves absent. Genae not projected ( Fig. 3 ). Pronotum transverse, lateral margin with tooth in posterior third of its length ( Figs 1, 3 ). Prosternum in front of coxae long ( Fig. 3 ), anterior portion of prosternum at midline longer than prosternal process. Procoxae rounded, not transverse. Procoxal cavities externally open ( Figs 3, 4 ). Shortest distance between procoxal cavities approximately as long as length of cavity ( Figs 2, 4 ). Procoxal cavity about as long as wide. Mesocoxal cavities narrowly separated ( Fig. 1 ): shortest distance between mesocoxal cavities less than half as long as shortest diameter of cavity. Mesocoxal cavities laterally closed by meeting of mesoventrite and metaventrite ( Figs 1, 2, 4 , 6 ). Metacoxae narrowly separated ( Figs 1 , 7 ), distance between coxae less than third of longest coxal diameter. Elytra fully concealing abdomen from above ( Figs 1, 2 ). Epipleurae complete, reaching elytral apex. Tarsi 5–5–5 ( Fig. 9 ). Tarsomere 1 shorter than tarsomeres 2 and 3 combined ( Figs 3 , 8, 9 ). Tarsomeres 3 with small lobes, tarsomere 4 shorter than others ( Figs 1, 2, 3 , 8 ). Tarsomere 5 not longer than previous ones combined ( Figs 1 , 9 ). Abdominal ventrite I without postcoxal lines. The length of ventrite I slightly longer than that of each subsequent ventrite.

Etymology. The specific name is formed based on the “ Khasurty ”, and “ philus ”, this refers to an indication of the place of discovery.

Figures

FIGURES 1–4. Khasurtyphilus storozhenkoi Lyubarsky, Vasilenko, Legalov & Perkovsky, sp. nov., holotype; 1—positive impression, general view, ventral, wetted with ethanol; 2—negative impression, general view, ventral, wetted with ethanol; 3—positive impression, head and prosternum, ventral, wetted with ethanol; 4—negative impression, head and prosternum, ventral, wetted with ethanol.

FIGURES 5–10. Khasurtyphilus storozhenkoi Lyubarsky, Vasilenko, Legalov & Perkovsky, sp. nov., holotype; 5—positive impression, antenna and head, dry; 6—positive impression, mesothorax, dry; 7—negative impression, posterior coxae and abdomen, dry; 8—negative impression, posterior leg, dry; 9—negative impression, posterior tarsus, dry; 10—interpretative drawing, general view, ventral.