Juralithinus Kireichuk & Ponomarenko, 1990

Kolibac, Jiri, 2013, Trogossitidae: A review of the beetle family, with a catalogue and keys, ZooKeys 366, pp. 1-194 : 79-80

† Genus Juralithinus Kireichuk & Ponomarenko, 1990 Map 6

Peltidae Kireichuk, A. G. & Ponomarenko, A. G. 1990: 79 (: Meligethiellinae ).

Type species:

Juralithinus gracilidorsum Kireichuk & Ponomarenko, 1990 [by monotypy and original designation]

Kolibáč, J. 2006: 126 ( Thymalini ). Ponomarenko, A. G. & Kireichuk, A. G. 2005-2008: http://www.zin.ru/animalia/Coleoptera/rus/paleosy2.htm. Schmied, H. et al. 2009: 24

Remarks.

The genus was originally described in Peltidae and classified within the extinct subfamily Meligethiellinae along with Meligethiella and Ostomalynus ( Kireichuk and Ponomarenko 1990). I accepted the classification within Trogossitidae : Peltinae . However, I synonymized Meligethiellinae and moved all three genera into the extant Thymalini ( Kolibáč 2006). Features of Juralithinus agree with a general definition of Peltinae , although after re-examination of its description and illustrations, I found the evidence too weak to classify the genus within any of the extant tribes. Therefore, it is listed herein as Peltinae incertae sedis. It may be considered an ancestor of Thymalini or Peltini or of both tribes

Original description of the genus

(translation from Russian). " Diagnosis: Body conspicuously longitudinal, with prothorax relatively elongate and narrow, coxae narrowly separated in all pairs of legs; metathorax without femoral lines [paracoxal sutures? - they are drawn in l.c., Fig. 1a ]; elytra distinctly wider than pronotum; first visible abdominal sternite approximately as large as the second to fourth, the last sternite longer. "

Original description of the species

(translation from Russian). " Elongate-oval beetle [sic]. Head with moderately protruded bidentate mandibles, very small transverse mentum and developed gular sutures. Pronotum with anterior margin deeply emarginate and widely rounded anterior corners. Transverse front coxae strongly [distinctly] narrowly separated, process between them not observed. Mesothorax convex at centre, middle coxae narrowly separated. Mesonotum wide, with widely rounded scutellum. Metathorax with conspicuous discrimen and paracoxal sutures, outer apices of metepisterna strongly anteriorly projecting. Hind coxae oval, very narrowly separated and obliquely situated towards centre. Elytra, with medium sized epipleurons, seem not to cover abdomen perfectly; their apices possibly artificially [sic] broken off. Femora medium-dilated, all with oval outlines. Tibiae weakly dilated towards apices, in middle, strangely enough, relatively thin with elongate apodemes [orig.: arrows] at apex. Hind tarsi relatively long, comprised of simple segments [i.e., without lobes]. Length - 9.3; width - 4.6; length of elytra - 2.3 [mm]."

Distribution.

Kazakhstan: Chimkentskaya obl., Mikhailovka; Mesozoic: Upper Jurassic, Karabastayskaya formation.

Species:

† Juralithinus gracilidorsum Kireichuk & Ponomarenko, 1990; Kazakhstan; Upper Jurassic (varA)

Kireichuk, A. G. & Ponomarenko, A. G. 1990: 80. Kolibáč, J. 2006: 126. Ponomarenko, A. G. & Kireichuk, A. G. 2005-2008: http://www.zin.ru/animalia/Coleoptera/rus/paleosy2.htm. Schmied, H. et al. 2009: 24

Figures

Figure 1. Adult morphology: A Alindria sp. from Laos, ventral surface B Leipaspis lauricola, labium C Airora cylindrica, antennal club D Corticotomus cylindricus, mandible dorsally E Airora cylindrica, mandible ventrally F Acalanthis quadrisignata, labium G Acalanthis quadrisignata, maxilla H Acalanthis quadrisignata, wing I Peltonyxa deyrollei, tegmen composed of 3 parts J Airora cylindrica, tegmen composed of 2 parts.

Map 6. A distribution of the tribe Lithostomatini and the genus † Juralithinus (Peltinae incertae sedis).