Planetella antennata Ševčík & Hippa, 2023

Ševčík, Jan, Hippa, Heikki, Burdíková, Nikola, Sopuch, Kryštof, Skuhravá, Marcela & Bruun, Hans Henrik, 2023, Integrative taxonomy of Central European Planetella (Diptera: Cecidomyiidae) indicates high species diversity, intraspecific variation and low host specificity, Acta Entomologica Musei Nationalis Pragae 63 (2), pp. 413-450 : 427-430

Planetella antennata Ševčík & Hippa sp. nov.

( Figs 7A,B,C , 13G )

Type material. HOLOTYPE: J, Slovakia , Muránska planina National Park, Rosiarka Nature Reserve, 16.–21.vi.2022, Malaise trap in Carex rostrata , leg. J. Roháček & J. Ševčík, specimen after DNA extraction, prepared on slide, No. PLA52 (coll. NMPC) . PARATYPEs (3 JJ): SLOVAKIA: 1J, Muránska planina National Park,Trsteník valley, 12.v.–16. vi.2016, Malaise trap among Carex rostrata and Carex umbrosa , leg. J. Roháček & J. Ševčík, specimen after DNA extraction, in ethanol (No. PLA 56) (coll. JSL-OUC), 2 JJ (one of them after DNA extraction, No. PLA 69): Muránska planina National Park, Trstie Nature Reserve, 14.vi.–13.vii.2023, Malaise trap in Carex rostrata , leg. J. Roháček & J. Ševčík (coll. NMPC, SMOC).

DNA sequences. DNA sequences (COI barcode region, 28S, 16S) taken from the holotype (No. PLA 52) are deposited in GenBank. TheirAccession numbers are provided in Table 1.

Diagnosis. This is the only European species of Planetella with 21 binodose flagellomeres (the apical one trinodose), eyes broadly separated, and banded abdomen. Male terminalia with gonocoxite broad, twice as long as broad, and aedeagus thin, elongated, longer than gonocoxite.

Etymology. The name refers to the unusual number of antennal flagellomeres; adjective.

Description. Male. Wing length 6.5 (holotype) to 7.3 mm (paratype). Overall body coloration: thorax mostly dark brown, abdomen light, whitish yellow with narrow dark posterior bands, legs and halters light brown.

Head dark brown. Eyes broadly separated, without eye-bridge. Antennal flagellum with 21 binodal tricircumfilial flagellomeres, except for the apical flagellomere which is trinodose. Flagellomere 1 ( Fig. 13G ) about 3.5 times as long as broad, slightly longer and less constricted but of similar shape as the other flagellomeres, flagellomere 4 ( Fig. 13G ) 2.8 times as long as broad. Maxillary palpus with 3 palpomeres, with the apical palpomere about twice as long as the previous one.

Thorax bicoloured, darker in anterior half, with scutellum light and lateral pleura mostly light brown. Both scutum (anteriorly) and scutellum lined with black lateral stripes. Anepisternum light with dark spot in upper half. Laterotergite mostly light brown with dark band posteriorly. Mediotergite with light anterior band and blackish brown posteriorly. Scutum distinctly produced above the relatively small head.

Wing elongated, about 2.7 times as long as broad. Veins C, R 1, R 5 and Cu-stem distinct. R 1 joining C before the middle of wing. R 5 reaching C beyond wing apex. Rs indistinct. M

4

indistinct. CuA with dark stem and bent downwards.

Legs with tarsal claws narrow, slightly longer than maximum tarsal diameter, proximally straight, bent in apical half.

Abdomen distinctly banded. Tergites 1 to 7 whitish grey anteriorly, with dark transverse band posteriorly. Band on tergite 6 narrower and darker than the others. Tergite 8 and terminalia mostly dark.

Terminalia ( Figs 7A,B ). Gonocoxite broad, about twice as long as broad, mediobasally with a small but distinct lobe. Gonostylus relatively short and narrow, slightly curved, broader in apical half, about three times as long as broad, half as long as gonocoxite, apically with a round- ed, transversely grooved dark lobe. Cerci short, apically pointed, basally fused. Hypoproct broad, evenly rounded apically, distinctly longer than cerci. Aedeagus narrow, elongate, longer than gonocoxites.

Female. Unknown.

Biology. This species is associated with Carex rostrata in montane and submontane habitats, where all the type specimens were collected. The galls are unknown.

Discussion. This species is remarkable by banded abdomen, 21 flagellomeres, eyes broadly separated and details on male terminalia. The only other European species with distinctly banded abdomen ( Planetella fasciata , see above) has only 12 flagellomeres and different male terminalia (narrow gonocoxites, narrow hypoproct, and cerci apically round- ed). In terms of K2P genetic distance ( Tab. 3), the closest species to P. antennata sp. nov., are P. galiciensis sp. nov., with 7.2% distance, and P. fasciata , with 7.8% distance.

Figures

Fig. 7. Male terminalia in ventral (A, D) and dorsal (B, E) view, and hypoproct and apex of aedeagus in ventral view (C). A, B, C – Planetella antennata Ševčík & Hippa sp. nov. (holotype). D, E – P. atrobrunnea Ševčík & Hippa sp. nov. (holotype). Scale 0.1 mm.

Fig. 13. Antennal flagellomere 4 (except flagellomere 3 in H) and outline of flagellomere 1 with or without associated pedicellus and scapus. A – Planetella granifex (Kieffer, 1898), B – P.gallarum (Rübsaamen, 1899), C – P.fasciata (Meigen, 1818), D – P. aestivalis Ševčík & Hippa sp. nov.(holotype), E, F – P. adami Ševčík & Hippa sp. nov. (holotype), G – P. antennata Ševčík & Hippa sp. nov. (holotype); H – P. atrobrunnea Ševčík & Hippa sp. nov. (holotype); I – P. csabai Ševčík & Hippa sp. nov. (holotype). Scales: 0.1 mm.