Globicornis (Globicornis) groehni, Bukejs & Háva, 2018

Bukejs, Andris & Háva, Jiří, 2018, A new species of Globicornis Latreille (Coleoptera: Dermestidae) from Baltic amber, with a key to fossil species, Zootaxa 4483 (2), pp. 395-400 : 396-399

publication ID

https://doi.org/10.11646/zootaxa.4483.2.11

publication LSID

lsid:zoobank.org:pub:464BAF06-E74A-4A91-91A4-42633A4F511B

DOI

https://doi.org/10.5281/zenodo.5951393

persistent identifier

https://treatment.plazi.org/id/03A587C1-383B-8706-F994-FD808823FEC4

treatment provided by

Plazi

scientific name

Globicornis (Globicornis) groehni
status

sp. nov.

Globicornis (Globicornis) groehni sp. nov.

( Figs. 1–5 View FIGURES 1–3 View FIGURES 4–5 )

Type material. Holotype: “GPIH no. 4951, coll. Gröhn no. 8587”, deposited in the Centrum of Natural History (CeNak) (formerly Geological-Paleontological Institute and Museum, GPIH) of the University of Hamburg, Germany; adult, sex unknown. Complete beetle is included in elongate, transparent amber piece, with dimensions of 65×23× 9 mm. Ventral side of specimen almost completely obscured by “milky” opacity. Syninclusions consist of one small specimen of Diptera , few stellate Fagaceae trichomes, and few small gas vesicles.

Type strata. Baltic amber, mid-Eocene to Upper Eocene.

Type locality. Baltic Sea coast, Yantarny settlement [formerly Palmnicken], Kaliningrad Region, Russia.

Differential diagnosis. Globicornis groehni sp. nov. differs from extinct species G. ambericus , G. rakovici , and G. ingelehmannae in possessing: (1) pronotum and elytra unicolorous black, and covered with black and yellowish to white setae (with paler setae forming patches); (2) antennomere 10 subtriangular with rounded apex; and (3) larger body size. See also key below.

This new fossil species differs from extant congeners of the genus in the combination of the following characters: (1) elongate-ovoid body shape; and (2) pronotum and elytra covered with bicoloured setae: black and yellowish to white (paler setae forming patches).

Description. Body shape elongate-ovoid, about 1.5× as long as wide, moderately convex; integument unicolorous black. Dorsum covered with moderately long, semierect, black setae (pronotal disc with finer and shorter setation), and with patches of paler (yellowish to white) setae: pronotum with three spots basally; each elytron with one spot basally, four spots in anteror one-third of elytral length, apparently two spots in posterior onethird, and one spot in posterior one-fifth; ventrum with shorter and denser dark setation. Total body length 3.6 mm, body maximum width 2.4 mm; pronotal length 1.0 mm, pronotal maximum width 2.1 mm; elytral length 2.6 mm, elytral maximum width 2.4 mm.

Head hypognathous, with dense and fine punctation. Frontal median ocellus present. Eyes oval, large, convex, entire. Antennae with ten antennomeres, clavate; with three antennomeres forming compact club and comprising about one-half of antennal length; scape hemispherical, large; pedicle hemispherical, slightly smaller than scape, and distinctly wider than antennomere 3; antennomeres 3–7 small, transverse; antennomeres 8–9 large, subequal in size and shape, transverse, 1.6× as wide as long, and slightly dilated apically; antennomere 10 subtriangular with rounded apex, about 1.5× as long as wide, and slightly narrower than antennomere 9.

Pronotum transverse, 2.1× as wide as long, bell-shaped, widest at base; lateral margin of pronotum widely rounded, posterior margin bisinuated; pronotal surface covered with fine punctation, distance between punctures distinctly larger than diameter of one puncture, interspaces with secondary punctures. Hypomeron with distinct antennal cavity. Prosternum with dense, small punctures; forming “collar” under which mouthparts fit when head retracted.

Scutellar shield minute, triangular with pointed apex, apparently impunctate and hairless.

Elytra about 1.1× as long as wide, widest in anterior one-third of length, narrowed posteriad, with anterior margin deeply concave, humeral callus weak; densely covered with small confused punctures (punctures distinctly larger than pronotal punctures), distance between punctures approximately 0.5–2.0× diameter of one puncture. Epipleura narrow, slightly impressed, wide at humeri and gradually narrowing toward elytral apex, not reaching elytral apex. Meso- and metasternum densely covered with moderately large punctation (distinctly larger than elytral punctures), distance between punctures less than diameter of one puncture.

Legs slender, moderately long; covered with fine punctures and short, recumbent setae. Femora flattened, with longitudinal groove ventrally. Tibia straight, subcilyndrical, about 0.5× as wide as femora, tibia and femora subequal in length; protibia without spines, slightly shorter than meso- and metatibia. Tarsi thin, moderately long, about 0.5× as long as tibiae, protarsus slightly shorter than meso- and metatarsus; relative length ratios of metatarsomeres 1–5 equal to 9- 9-7-5-13. Claws thin and long, free, simple.

Abdomen densely covered with small setae; relative length ratios of ventrites 1–5 (laterally) equal to 9-7-5-5- 7.

Etymology. The species is named in honor of Carsten Gröhn (Glinde, Germany) who provided us the species for the analysis.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Dermestidae

Genus

Globicornis