Lithostoma Martynov, 1926

Kolibac, Jiri, 2013, Trogossitidae: A review of the beetle family, with a catalogue and keys, ZooKeys 366, pp. 1-194 : 78-79

† Genus Lithostoma Martynov, 1926 Map 6

Lithostoma Martynov, A. V. 1926: 13 (in Russian), 32 (in English)

Type species.

Lithostoma expansum Martynov, 1926 [by monotypy]

Kolibáč, J. & Huang, D.-Y. 2008: 142 (Remarks, English description and translation of Russian description). Ponomarenko, A. G. & Kireichuk, A. G. 2005-2008: http://www.zin.ru/animalia/Coleoptera/rus/paleosy2.htm. Schmied, H. et al. 2009: 26

Original description of the genus

(translation from Russian). " Head free, dilated between the eyes [Russ.: and narrowed backwards]; mandibulae strong, sharply bent inwards, with perhaps two teeth at the apices; antennae resembling those in living Ostomatinae [Russ.: in Ostoma and other genera]; basal joint large, bulbous anteriorly, second much smaller, third still smaller, short, fourth joint of the same width but elongated, 5-7th joints elongated but becoming gradually thicker towards the tip [Russ.: joints 10 and 11 not preserved], last 8-11 joints only slightly thicker, without distinct apical club (clavus). Pronotum broadening posteriorly, apparently furnished with marginal dilatations [Russ.: as in Ostoma ]; covered all over with numerous point-like pits. Elytra broad, rounded at postero-lateral margins [Russ.: as in Ostoma ], with perhaps 8 longitudinal stripes, each containing two rows of raised black points; intermediate narrow stripes barely elevated; both marginal dilatations also with pits and points [Russ.: Body size about 6 mm.]." ( Martynov 1926: 32.)

Original description of the species.

English text: " Head and antennae as in generic description; sides of pronotum convex, points distinct; elytra broad, rounded at the postero-lateral margins; marginal dilatations rather broad; the dividing stripes not elevated. Length of the body 6 mm. " ( Martynov 1926: 32)

Translation of Russian text: " Head free, strongly projecting anteriorly (partly artificial condition in compressed specimen). Mandibles robust, left mandible bidentate (right inconspicuous). Antennae as described above, each joint weakly dilated at apex; each dilated area with thin [sic], dark, round rim. Final two joints torn off, only a trace of joint 10 present. Pronotum widened towards base, with shallow punctures interspersed with small tubercles. Elytra wide, rounded apically and dorsally [sic]; flattened sides well-developed and probably lighter than dark brown convex portion of elytra. Elytra, including flattened sides, with rows of well-developed small, black tubercles [orig.: "convex punctures"]; carinae among them not higher than tubercles. Length of body from anterior margin of labrum to apex of elytra - 6 mm. " ( Martynov 1926: 13.)

Note:

The Russian and English texts vary somewhat from one another; the Russian is more comprehensive.

Distribution.

Southern Kazakhstan: paper-shales near Galkino (approximately 42.15N, 70.02E), Chimkentskaya oblast district. Mesozoic: Upper Jurassic, probably Oxfordian.

Species:

† Lithostoma expansum Martynov, 1926; Kazakhstan; Upper Jurassic (varA)

Martynov, A. V. 1926: 13 (in Russian), 32 (in English). Kolibáč, J. & Huang, D.-Y. 2008: 143 (Remarks, English description and translation of Russian description). Ponomarenko, A. G. & Kireichuk, A. G. 2005-2008: http://www.zin.ru/animalia/Coleoptera/rus/paleosy2.htm. Schmied, H. et al. 2009: 26

Figures

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