Hoffeinsensia jantarica, Kuśka, Antoni & Kania, Iwona, 2010

Kuśka, Antoni & Kania, Iwona, 2010, New soldier beetles (Coleoptera, Cantharidae) from the Eocene Baltic amber, Zootaxa 2400, pp. 49-56 : 50

Hoffeinsensia jantarica sp. nov.

( Figs 1 – 6 )

Diagnosis. Antennae 12-segmented with segments 3rd to 9th saucer-shaped and widened. Elytra black-brown, with yellow elongate spots on humeri and very narrow pale brown margin diminishing at apex of elytra. Pronotum subrectangular with two protuberances at the side in posterior half.

Description. Body elongate ( Figs 1–2 ), 7.0 mm long (from front margin to elytral apex) and 2.8 mm wide. Specimen partly covered by white emulsion making it difficult to examine the details of head structure. Head narrower than pronotum, with strongly prominent eyes, triangular last segment of maxillary palp ( Fig. 3 ) and last segment of labial palp, and yellowish brown basal segments of labial palp. Antennae ( Fig. 4 ) 5.2 mm long, 12-segmented, inserted close to inner-lower margins of eyes; segment 1 elongate, club-shaped; segment 2 cylindrical, 1/3 length of segment 1; segments 3–6 conical, similar in shape, sized from the smallest (3) to biggest (6); segments 7 and 8 strongly asymmetrically dilated, saucer-shaped, wider than long; segment 9 narrower, almost cylindrical; segments 10 and 11 filiform, a little longer than segement 1, slightly extended at end; segment 12 slightly longer than previous segments, with apex acute; all segments pubescent; general colour brown with ventral side paler, yellowish-brown. Pronotum ( Fig. 5 ) brown, rectangular, wider than long, anterior corners rounded, posterior ones sharp and protruding laterally; disc rough, with deep punctures, pubescent and two oblong tubercles, flanking posterior portion; epipleuron regularly rounded. Elytra 5.3 mm long, almost black, shiny, with smooth, yellow humeri; surface of elytra rough, shallowly punctured, and covered with white pubescence. Legs slender, tarsal segment 1 as long as sum of segments 2 and 3; segment 4 bilobed, deeply incised almost to base; tarsal claws parallel, not connected with delicate denticles at base; legs covered with closely recumbent pubescence. Abdominal segment 7 well visible, covered with scarce pubescence; posterior margins of last two sternites yellowish. Aedeagus oval with shallow indentation at apex; apices of two parameres partly visible; posterior portion of abdomen and copulatory apparatus covered by last tergite.

Etymology. The species name is created from Slavonic name of amber – jantar.

Materials examined. Holotype, No. 1221-2, male; Eocene, Baltic amber. Paratype 1, No. 1226-1, male; Eocene, Baltic amber, collection Ch. & H. W. Hoffeins. The specimen (holotype) 6.5 mm long, the lower side well visible, upper surface covered by white emulsion. Head capsule with maxillary and labial palps visible, black colored, triangular; abdomen well visible.

Additional material examined. Three specimens, not included in the type series, of inclusions in the Eocene Baltic amber from collection of Jacek Serafin (Piaseczno, Poland) belong to this species:

Serial number 1, sex not determined, probably male. Body 7.0 mm long, specimen very darkly colored, last segments of antennae cut during polishing of the piece of amber; syninclusions: Psylloidea, 2 specimens.

Serial number 2, male. Body 9.0 mm long, syninclusions: Thysanoptera - two specimens and Psylloidea - one specimen.

Serial number 3, male. Body 8.0 mm long, the last segment of antennae cut during polishing of piece of amber.

Figures

FIGURES 1 – 2. Hoffeinsensia jantarica sp. nov. 1. Holotype, dorsal view. 2. Paratype 1, ventral view.

FIGURES 3 – 6. Hoffeinsensia jantarica sp. nov. 3. Palpus maxillaris. 4. Antennae. 5. Pronotum. 6. Last segments of abdomen, ventral view.