Mycetobia szwedoi, 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 : 30-31

Mycetobia szwedoi sp. nov.

( Figs 24–26 )

urn:lsid:zoobank.org:act:A84B5185-7BA0-46C0-B2C6-CA11DAA7FA64

Diagnosis. Flagellomeres wide, 1–10 wider than long; becoming narrowed and more elongated to the apex of antenna, the last one 3x as long as wide, tapered at apex; last palpomere elongated 3x as long as wide, tapered at apex; Sc ending opposite Rs bifurcation level; the distance between R 1 and R 2+3 apices approximately 5x as long as the distance between Sc and R 1 apices; R 1 apex before M 1+2 bifurcation level; R 2+3 2.5x as long as Rs; fork of M 1+2 wide, M 1+2 slightly longer than M 1; the distance between M 1 and M 2 apices shorter than the distance between R 4+5 and M 1; the distance between M 1 and M 2 apices shorter than the distance between M 2 and M 3+4; R 2+3 and R 1 ending behind bifurcation of M 1+2 level, R 2+3 ending beyond half R 4+5 level; very elongated and thick setae on thorax; male terminalia approximately one third of the body length; cerci large, gonostyles arched with elongated process, anal point huge with elongated process at apex.

Etymology. The species name is dedicated to Professor Jacek Szwedo (University of Gdańsk), the eminent specialist on recent and fossil insects.

Type material. Holotype: No. MP/3693 (male), Baltic amber, (ISEA PAS).

Description: Body ( Fig. 25A, B ) 3.17 mm long, brown. Head: antenna ( Figs 24A ; 25 A–C), 0.68 mm long; last flagellomere 0.12 mm long, penultimate one 0.06 mm; 14 flagellomeres with dense, elongated setae, short setae very dense.

Thorax ( Fig. 25A, D ): wing ( Figs 24C ; 25E ): 2.32 mm long, 0.99 mm wide, Rs 0.24 mm long; R 2+3 0.73 mm long; M 1+2 0.67 mm long; the length of M 1 0.61 mm.

Legs ( Fig. 25A, F ): 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 ( Fig. 25F ). Tarsus of fore leg 0.3 the length of entire leg including coxa or longer. Fore coxa 0.46 mm, trochanter 0.12 mm, femur 0.65 mm, tibia 0.69 mm, tarsus 1.96 mm long (0.54/0.11/0.10/0.10/0.11); longer tibial spur of fore leg 0.09 mm long. Middle coxa 0.42 mm long, trochanter 0.10 mm long, femur 0.74 mm long, tibia 0.90 mm, tarsus 0.95 mm (0.53/0.14/0.12/0.10/0.13); longer tibial spur of middle leg 0.05 mm long. The length of hind coxa 0.41 mm, trochanter 0.12 mm, femur 0.83 mm, tibia 0.92 mm, tarsus 1.22 mm (0.55/0.40/0.12/0.09/0.13); longer tibial spur of hind leg 0.09 mm long. Last tarsomere longer than penultimate one. Apical comb of fore leg not very huge, apical comb of hind leg well developed, massive.

Abdomen ( Figs 24B ; 25A ; 26A, B ): male terminalia very large, 0.96 mm long, cerci large, not tapered at apex, small processes on apex of anal point.

Comparison. In contrast to M. christelae sp. nov., in Mycetobia szwedoi sp. nov. small processes on apex of anal point is visible. Sc ending opposite Rs bifurcation level, while in other species R 1 apex is positioned before or beyond M 1+2 bifurcation level ( Table 2).

Figures

FIGURE 24. Mycetobia szwedoi sp. nov. holotype, No. MP/3693 (male), (ISEA PAS). A. antenna; B. male terminalia C. wing venation. Abbreviations: PED—pedicel; SC—scape; f1–f14—flagellomeres.

FIGURE 25. Mycetobia szwedoi sp. nov. holotype, No. MP/3693 (male), (ISEA PAS). A. habitus, lateral view; B. habitus, dorso-lateral view; C. flagellomeres; D. enlarged view of part of thorax with praescutellar setae; E. enlarged view of macrotrichia on wing venation; F. enlarged view of apical comb of hind leg.

FIGURE 26. Mycetobia szwedoi sp. nov. holotype, No. MP/3693 (male), (ISEA PAS). A., B. male terminalia. A. latero-ventral view; B. latero-dorsal view.