Porricondyla oblonga, Jaschhof, 2024

Jaschhof, Mathias, 2024, New taxa and new records of Winnertziinae and Porricondylinae (Diptera: Cecidomyiidae) from Germany, European Journal of Taxonomy 953, pp. 1-134 : 95-96

Porricondyla oblonga sp. nov.

urn:lsid:zoobank.org:act:3326B979-98CB-47A2-AC91-E3DD3DC19974

Fig. 24

Diagnosis

Morphology

Porricondyla oblonga sp. nov. belongs to the species group around P. nigripennis (Meigen, 1830) , which also comprises P. gemina ( Jaschhof & Jaschhof 2020a) and two as yet unnamed species (unpublished data). Several characters once thought to be specific to P. nigripennis are actually found in all these species, notably the conspicuously banded abdomen and the scutum with both presutural and prescutellar windows ( Jaschhof & Jaschhof 2013: fig. 16). Also, males have similar-looking terminalia that interspecifically differ merely in subtle details. Porricondyla oblonga is distinguished as follows ( Fig. 24A ): the gonostylus is slightly elongated, thus longer than in the other species (↓ 1), the gonocoxal processes bear fairly large microtrichia, which are most numerous on the dorsal side (↓ 2), and the narrowed anterior portion of the gonocoxal synsclerite is longer than in the sibling species (↓ 3). Larvae and females are unknown.

DNA barcode

The CO1 sequence (653bp) of the paratype specimen is available in BIN BOLD:ACP5893. Search on BOLD’s BIN Database (accessed 27 Aug. 2023) retrieved a further three matches for this BIN, as Diptera sp. from Germany (two matches) and Cecidomyiidae sp. from Norway (one match).

Etymology

The specific epithet, ‘ oblonga ’, is the Latin adjective for ‘elongate’, with reference to the shape of the gonostylus.

Type material

Holotype

GERMANY • ♂; Bavaria, Dammbach, Dammbachtal ; 49°85′96″ N, 9°34′89″ E; elev. 368 m; 17 Jun.‒2 Jul. 2021; GBOL and R. Albrecht leg.; Malaise trap; pasture; ZSM-DIP-42471-F08 .

Paratype

GERMANY • 1 ♂; Bavaria, Munich, Botanical Garden ; 48°16′46″ N, 11°49′49″ E; elev. 516 m; 21 Jun.‒1 Jul. 2020; GBOL and R. Albrecht leg.; Malaise trap; BOLD GBDTA10300-21 ; ZSM-DIP-42307-D04 .

Other characters

Male

BODY LENGTH. 2.0 mm.

HEAD. Eye bridge dorsally 3 ommatidia long. Antenna longer than body; scape and pedicel concolorous with flagellum; circumfila present on flagellomeres 1‒13; neck of fourth flagellomere 1.4× as long as node ( Fig. 24B ). Palpus 4-segmented, markedly longer than head height, apical segment almost twice as long as preceding segment.

THORAX. Pronotal setae 6‒8, anepisternal setae 2‒4, anepimeral setae 5‒8.

WING. Markedly longer than body. Length/ width ratio 2.8.

LEGS. Foreleg with femur 0.9× length of tibia, tibia 1.4× length of T 2. Claws with 1 large and 2‒3 much smaller teeth basally. Empodia broad, slightly longer than claws.

TERMINALIA ( Fig. 24A ). Gonocoxal synsclerite: setae confined to ventrolateral and dorsal portions; ventral emargination with broad, darkly pigmented margin; dorsal apodemes project only slightly beyond ventroanterior margin. Gonostylus: pectinate tooth large, dented in the middle, which results in a sinuous margin; inside glabrous except for 5‒6 long bristles inserted below tooth. Parameres similar to these found in the sibling species, with broad, slightly bent transverse bridge subbasally. Aedeagal apodeme as long as gonocoxae, strongly sclerotized, slightly broadened apically.

Remarks

In the original description of P. gemina it was stated that the gonostylar pectinate tooth follows the curve of the gonostylar body, i.e., is evenly rounded (Jaschhof & Jaschof 2020a: 170, fig. 34). This observation is incorrect, as my examination of additional material has now revealed. In fact, the gonostylar tooth is dented in the middle, in the same way as in both P. nigripennis and P. oblonga sp. nov.

Figures

Fig. 24. Porricondyla oblonga sp. nov., holotype, ♂ (ZSM-DIP-42471-F08). A. Terminalia, ventral view. B. Fourth flagellomere, lateral view. Scale lines: 0.05 mm. The numbered arrows indicate diagnostic characters (see text).