Sanaungulus peteriruedeli, Fanti & Müller, 2022

Fanti, Fabrizio & Müller, Patrick, 2022, Fossil Cantharidae from the Cretaceous Burmese (Kachin) amber of the Patrick Müller collection, and taxonomic information, Baltic Journal of Coleopterology 22 (2), pp. 331-380 : 366-368

Sanaungulus peteriruedeli sp. nov.

( Fig. 20 )

Holotype. Sex undefined, adult specimen in a Burmese (Kachin) amber piece: Catalog number SNHM­ 6012 in the Staatliches Naturhistorisches Museum Braunschweig (ex Müller’s collection number: BUB4460 ).

Type locality. Myanmar: Kachin state, Myitkyina District, Hukawng Valley.

Type horizon. Lowermost Cenomanian (98.79 ± 0.62 Ma), mid­Cretaceous.

Fossil Cantharidae from the Cretaceous Burmese (Kachin) amber of the Patrick Müller collection..

Differential diagnosis. Sanaungulus peteriruedeli sp. nov. is characterized by its antennae with very large and robust antennomeres, in particular antennomeres III–VII.

Description. Adult, winged, rather robust. Sex undefined. Body length 4.1 mm. Entirely brown.

Head transverse, constricted (triangular­shaped) behind the eyes, surface irregular. Eyes prominent, very large, roundish, inserted in the upper and lateral part of the head. Mandibles elongated, robust, falciform. Maxillary palps 4­ segmented with the last palpomere strongly elongated and securiform. Labial palps 3­ segmented, with the last palpomere securiform. Antennae 11­ segmented, slightly surpassing half of elytra and not reaching half of abdomen, antennal insertion far from the eyes; scape club­shaped, elongated, robust; antennomere II very short, small, swollen apically; antennomeres III–IV extremely wide and robust, flat, stouter than scape; antennomeres V–VI robust, less wide and slightly longer than previous ones; antennomeres VII–X robust, narrower than previous ones; antennomere XI robust, with rounded apex; all the antennomeres pubescent. Pronotum very elongated, slightly narrower than head, anterior margin undulate and not bordered, posterior margin slightly curved in the middle and slightly bordered, sides straight except for a small tooth near the apex and not bordered, corners obtuse, pronotum disc irregular with large drafts. Scutellum triangular­shaped, wide basally with rounded apex. Elytra short which reveals some abdominal segments, at humeri strongly wider than pronotum, posteriorly parallel­sided and slightly dehiscent apically, rounded apexes, surface smooth (only few and very small punctuation) with pubescence. Metathoracic wings transparent, approximatively as long as elytra. Sternum very elongated and slender, sternites transverse and pubescent, last sternite small, penultimate abdominal segment with a long lobe at the apical corners. Legs thin, long, slightly pubescent; coxae massive; trochanters elongated, robust, with thin and rounded apex; femora curved, cylindrical, slightly sturdier than tibiae; tibiae, thin, subcylindrical, long, with a small spur near the apex, pro­ and mesotibiae slightly longer than pro­ and mesofemora, metatibiae longer than metafemora. Tarsal formula 5­ 5­ 5; first tarsomere long, about 1.1­ 1.2 times longer than second; third tarsomere short, triangular­shaped; fourth strongly bilobed; fifth tarsomere extremely elongated, thin, cylindrical and curved; claws simple, long, pointed, without denticle at the base.

Etymology. Named in honor of Peter Rüdel, friend of the second author (Patrick), and a great amber collector.

Syninclusions. Detritus, air bubbles (small), a specimen of Berothidae ( Neuroptera ).

Remarks. Piece of brownish Burmese amber that measures 14x9x 4 mm. The inclusion is complete and only opacified in the last sternites due to the presence of emulsion.

Figures

Fig. 20. Sanaungulus peteriruedeli sp. nov. in Burmese amber. A: Holotype, dorsal view; B: Holotype, ventral view.