Picemelinus irinae, Alekseev, Vitalii I. & Grzymala, Traci L., 2015

Alekseev, Vitalii I. & Grzymala, Traci L., 2015, New Aderidae (Coleoptera: Tenebrionoidea) from Baltic and Bitterfeld amber, Zootaxa 3956 (2), pp. 239-257 : 244-245

publication ID

https://doi.org/ 10.11646/zootaxa.3956.2.5

publication LSID

lsid:zoobank.org:pub:C12EF13A-9C19-4051-80A6-F59B917774AA

DOI

https://doi.org/10.5281/zenodo.5658581

persistent identifier

https://treatment.plazi.org/id/935AFBD5-C586-4A15-8D46-E7CEBC4958DF

taxon LSID

lsid:zoobank.org:act:935AFBD5-C586-4A15-8D46-E7CEBC4958DF

treatment provided by

Plazi

scientific name

Picemelinus irinae
status

sp. nov.

Picemelinus irinae sp. nov. Alekseev & Grzymala

( Figs. 8–9 View FIGURES 8 View FIGURES 9 )

Material examined. Holotype No. 890-5 [ CCHH], male ( Figs. 8–9 View FIGURES 8 View FIGURES 9 ). The beetle inclusion is preserved in a polished piece of transparent amber with a yellowish shade without any further fixation. The piece is small, irregular in form, with maximum length 12 mm and maximum width 8 mm. The syninclusions are represented by two trichomes.

Etymology. Matronymic, this new species is dedicated to the mother of the first author—Irina I. Alekseeva.

Type strata. Baltic Amber. Eocene.

Type locality. Russia, the Kaliningrad region, the Sambian [Samland] peninsula, Yantarny settlement [formerly Palmnicken].

Description. Length 1.8 mm; moderately convex, elongate. Unicolored, black. Upper surface biseriate, clothed with very short pubescence, one seta arising anterad of each puncture, with additional short, numerous setae between primary pubescence (pruinose pubescence). Body length 1.9× maximum body width. Elytral length 3.6× pronotal length.

Head. Eyes large, oval, hemispherical, with slight anterior emargination, well-separated from hind margin of head; interocular space narrower than one ocular diameter; temples approximately 1/3 of minimum ocular diameter; apical maxillary palpomere elongate triangular; vertex covered by pubescence equal in length and width to elytral pubescence. Antenna ( Fig. 8 View FIGURES 8 B) filiform, 11-segmented, pubescent, reaching middle of elytra when folded backward; scape, antennomere III, and antennomere XI longest; antennomere length ratios: 14-4-20-5 -5-6-6- 6-6-6- 11; antennomere III with two apical projections forming cavity for antennomere IV.

Thorax. Pronotum ( Fig. 8 View FIGURES 8 A) transverse, width 0.7× length, widest apically, with very shallow impression laterad of basal angle, disc with pubescence indistinct, punctation dense and coarse. Scutellum subquadrate, without visible punctation or pubescence. Elytron with short, simple pubescence, moderately convex, with slight depression on disc in basal third near suture; sides weakly rounded; width 0.7× length; punctation dense and coarse; punctures finer towards lateral aspects of disc.

Abdomen. Separation of abdominal ventrite I and abdominal ventrite II visible medially and laterally. Legs. Metafemur simple, without visible brush or comb of modified setae. Metatarsomere I length 3.0× metatarsomeres II–IV combined, metatarsomere II bilobed, metatarsomere III concealed.

Diagnosis. Picemelinus irinae sp. nov. differs from the only extant described member of this genus from Japan, Picemelinus flabellicornis (Pic, 1910) , by the simple instead of flabellate antennomeres V–X. The elongate scape and the very distinctive length and shape of antennomere III provide evidence for the congeneric status of these two species.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Aderidae

Genus

Picemelinus

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