Pachytylaradus cretaceous, HEISS, 2022

HEISS, ERNST, 2022, Pachytylaradus cretaceous gen. et sp. nov. from Burmese amber (Heteroptera, Aradidae), Palaeoentomology 5 (4), pp. 294-297 : 296

Pachytylaradus cretaceous sp. nov.

( Fig. 1 )

Holotype. Macropterous female specimen, BUR-ARAD-09 embedded in a honey-colored piece of Burmese amber; left membrane lacking, right wing with membrane spread laterally but is obscured by impurities in the stone; dorsal side rather well visible, details of venter are not discernible.

Etymology. The epithet refers to the geological age of the inclusion.

Description. Specimen of unusual large size (6.9 mm) with large and wide clypeus, antennae shorter than width of head, semicircular scutellum without median carina, no metathoracic scent glands, deltg II-VII without lateral expansions, hyaline membrane of hemelytra, surface of body densely beset with fine setigerous tubercles, claws with long pulvilli.

Head. Wider than long (1.60/1.50), clypeus wide, dentate lateral margins subparallel, apex rounded reaching basal half of antennal segment III; antenniferous lobes long and acute with dentate lateral margins, diverging anterolaterally; antennae short, 0.9 times as long as width of head (1.45/1.60), segments I–IV cylindrical, segment I with an anterolateral spine like expansion, I-III of subequal length, shorter than IV which is longest; length of antennal segments I:II:III:IV = 0.30:0.35:0.30:0.50; eyes globular, lightly stalked anteriorly: postocular lobes adherent to eyes, straight and not exceeding their outer margin; disk of clypeus and vertex flat.

Pronotum. 3.2 times as wide as long (2.40/0.75), lateral lamellate paranota rounded at humeri then sinuately converging anteriorly to rounded anterolateral angles, these produced over anterior margin; disk flat with a shallow median impression.

Scutellum. Slightly wider than long (1.45/1.35), of semicircular shape, lateral margin densely beset with setigerous tubercles which are larger than those of the flat disk.

Hemelytra. Corium about as long as the scutellum, membrane of left wing broken, preserved part of the laterally spread right wing with distinct veins; width of abdomen across deltg IV 2.75.

Legs. Beset with setigerous tubercles, femora incrassate toward base, tibiae thinner and slender; bi-segmented tarsi with claws bearing pulvilli.

Venter. Structures like length of rostrum, metathoracic glands or position of spiracles are obscured by an opaque layer and cannot be observed.

Figures

FIGURE 1. Pachytylaradus cretaceous gen. et sp. nov. from Burmese amber. A, Holotype female dorsal view. B, Ditto head and thorax. C, Ditto terminal segments of abdomen, dorsal view. D, Ditto head. Scale bars = 1 mm in A and B, 0.5 mm in C and D.