Planetella davidi 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 : 432-433

publication ID	https://doi.org/ 10.37520/aemnp.2023.026
publication LSID	lsid:zoobank.org:pub:E961B014-4A0D-482B-A005-6D7B58D60B03
persistent identifier	https://treatment.plazi.org/id/03DA5107-FFC1-FFE0-78C8-FB6BFBD53EDF
treatment provided by	Felipe
scientific name	Planetella davidi Ševčík & Hippa
status	sp. nov.

Treatment

Planetella davidi Ševčík & Hippa sp. nov.

( Figs 9C,D,E View Fig , 14C View Fig )

Type material. HOLOTYPE: J, Slovakia, Cerová vrchovina Protected Landscape Area , Jestice, Hradisko, 4.v.–25.v.2022, Malaise trap in Quercus cerris forest, leg. J. Roháček & J. Ševčík, specimen after DNA extraction, prepared on slide, No. PLA47 (coll. NMPC) . PARATYPE: the same data as holotype, specimen after DNA extraction (No. PLA 47b) (coll. JSL-OUC).

DNA sequences. DNA sequences (COI barcode region, 28S, 16S) taken from the holotype (No. PLA 47) are deposited in GenBank. Their Accession numbers are provided in Table 1.

Diagnosis. A mostly light brown species, with dark mediotergite and other dark spots on several places on thorax. Antenna with 12 binodose flagellomeres, plus a short apical segment. Eyes with a narrow, membranous eye-bridge. Terminalia with a narrow, apically excavated hypoproct, and a club-shaped, distally distinctly broadened gonostylus ( Figs 9C,D,E View Fig ).

Etymology. This species is named after David Ševčík (a younger son of the first author), who was born in the same year when this species was collected.

Description. Male. Wing length 5.5 mm. Overall body coloration mostly light brown, with legs and halters brownish. Head. Eyes with a narrow, membranous eye-bridge, ommatidia not touching. Antennal flagellum with 12 binodal tricircumfilial flagellomeres, and apically with a short uninodal flagellomere lacking circumfila. Flagellomere 1 ( Fig. 14C View Fig ) about 4.6 times as long as broad, slightly longer but of similar shape as the other flagellomeres, flagellomere 4 ( Fig. 14C View Fig ) about 3.8 times as long as broad. Maxillary palpus with 2 palpomeres, with the apical palpomere about twice as long as the previous one.

Thorax mostly light orange brown. Scutum distinctly produced above the head. Blackish marks on both sides of scutum anteriorly and on both sides of scutellum. Lateral sclerites mostly brownish, except anterior one, which is dark. Mediotergite blackish brown, except anterior margin.

Wing elongated, about 2.8 times as long as broad. Veins C, R 1, R 5 and Cu-stem dark and distinct. R 1 joining C in the middle of wing. R 5 reaching C beyond wing apex. Rs missing. M 4 light and indistinct. CuA with dark stem and bent downwards.

Legs with tarsal claws about as long as maximum tarsal diameter, gradually bent, as long as empodium.

Abdomen light brown, with a light oval spot on each side of the tergite.

Terminalia ( Figs 9C,D,E View Fig ). Gonocoxite relatively broad, about twice as long as broad, mediobasally with a small lobe. Gonostylus distinctly broadened posteriorly, slightly curved, twice as long as broad, shorter than gonocoxite, apically with a broad, rounded, transversely grooved dark lobe. Cerci relatively broad, rounded, basally fused. Hypoproct narrow, only slightly broader than aedeagus, apically excavated, distinctly longer than cerci. Aedeagus narrow, elongate, longer than hypoproct. Gonocoxal apodemes strongly sclerotized, medially fused.

Female. Unknown.

Biology. This species is probably associated with Carex humilis , growing in the thermophilous forest (with Quercus cerris ) around the Malaise trap where both the type specimens were collected. The galls remain unknown.

Discussion. This species is characterized by its coloration, 12 flagellomeres, eyes with thin eye-bridge, typical shape of gonostylus, and narrow hypoproct. It is known only from the type locality in southern Slovakia. Its sister species in the phylogenetic tree ( Fig. 15) is Planetella gallarum but its closest relative in terms of K2P genetic distance is P. galiciensis sp. nov., with 9.7% distance ( Tab. 3), nested in different part of the tree.