Mycetobia perkovskyi, Wojtoń & Kania & Krzemiński, 2019

Wojtoń, Maciej, Kania, Iwona & Krzemiński, Wiesław, 2019, Review of Mycetobia Meigen, 1818 (Diptera, Anisopodidae) in the Eocene ambers, Zootaxa 4544 (1), pp. 1-40 : 21-24

Mycetobia perkovskyi sp. nov.

( Figs 16–18 )

urn:lsid:zoobank.org:act:5451D820-E169-450E-A9EF-9A946AB86595

Diagnosis. Flagellomeres short, wider than long or slightly longer, tapered to the apex of antenna, last flagellomeres at most 1.5x as long as wide, up to 2x as long as wide; last palpomere 3x as long as wide, tapered at apex; Sc ending before Rs bifurcation level; R 1 apex fare before M 1+2 bifurcation level; the distance between R 1 and R 2+3 apices approximately 3x as long as the distance between Sc and R 1 apices; R 2+3 2.5x as long as Rs; M 1+2 as long as M 1; fork of M 1+2 wide; the distance between M 1 and M 2 apices as long as the distance between M 1 and R 4+5 apices and shorter than the distance between M 2 and M 3+4. R 2+3 ending before bifurcation of M 1+2 level, before half R 4+5; thorax with not very thick, not very elongated and sparse setae.

Etymology. The species name is dedicated to Professor Evgeny Perkovsky, National Academy of Sciences of Ukraine; I. I. Schmalhausen Institute of Zoology, eminent specialist on extinct and extant Diptera .

Type material. Holotype: No. 872 (sex unknown), Ukrainian amber, (Ukrainian Amber Museum, National Academy of Sciences of Ukraine; I. I. Schmalhausen Institute of Zoology, (NAS of Ukraine)).

Remarks: Head, thorax and abdomen are partially covered by “white milk”.

Description. Body ( Fig. 17A ) 3.41 mm long, brown; head and thorax combined 1.39 mm long, head high 0.37 mm. Antenna ( Figs 16A ; 17A, B ), comparatively elongated, 1.09 mm long; pedicel very short, approximately as long as wide; last flagellomere longer than penultimate one, tapered at apex; all 14 flagellomeres with not very elongated sparse setae, shorter than width of segments bearing them; additionally very short setae on all flagellomeres; palpus maxillaris ( Fig. 17C ) with terminal palpomere elongated; sparse short setae on all palpomeres.

Thorax: Wing ( Figs 16B ; 17A, D, E ): 2.79 mm long, 1.17 mm wide; Sc comparatively short, ending in proximal part of wing, approximately in one third from base, before half the length of Rs; Rs 0.36 mm long; R 1 apices in about 0.6 of wing length. Rs separate Rb in 0.3 of wing length from wing base; Rs stem shorter than half R 2+3; R 2+3 0.77 mm long.

Legs ( Fig. 18A, B ): fore, middle and hind tibia with two unequal tibial spurs; tarsus comparatively elongated with last segment only slightly longer than penultimate one and not very elongated, rather slender claw and almost invisible empodium. Apical comb well visible on fore and hind legs. Elongated bristles in distal part of femurs; tarsus comparatively elongated with last tarsomere longer than penultimate. Tarsus of fore leg 0.3 the length of entire leg including coxa or longer. Fore coxa 0.65 mm, tibia 0.60 mm, tarsus 0.94 mm long (0.51/0.27/0.13/0.07/ 0.09). Hind tarsus 1.13 mm long (0.62/0.18/0.11/0.09/0.13).

Comparison. In contrast to M. szwedoi sp. nov. setae on thorax in M. perkovskyi sp. nov. are sparse, not very elongated, last flagellomere is at most 1.5x as long as wide, in M. szwedoi sp. nov. flagellomeres are short, wider than long or slightly longer, in M silvia sp. nov. flagellomeres 8–13 are elongated 2x as long as wide or longer, the last one 3x as long as wide. Differences in wing venation between M. perkovskyi sp. nov. and other are provided in Table 2.

Figures

FIGURE 16. Mycetobia perkovskyi sp. nov. holotype, No. 872 (sex unknown), (coll. NAS of Ukraine). A. antenna; B. wing venation. Abbreviations: SC—scape; PED—pedicel; f1–f14—flagellomeres.

FIGURE 17. Mycetobia perkovskyi sp. nov. holotype, No. 872 (sex unknown), (coll. NAS of Ukraine). A. habitus, lateralview; B. antenna; C. palpus maxillaris; D. wing; E. enlarged view of R 1, R 2+3, R 4+5 apices. Abbreviations: f1–f14—flagellomeres; PED—pedicel; SC—scape; I–IV palpomeres I–IV.

FIGURE 18. Mycetobia perkovskyi sp. nov. holotype, No. 872 (sex unknown), (coll. NAS of Ukraine). A. tibial spurs and apical combs of middle and hind legs; B. fore leg. Abbreviations: AC—apical comb; TS—tibial spurs.