Paurodyla serrata, Jaschhof & Jaschhof, 2020

Jaschhof, Mathias & Jaschhof, Catrin, 2020, The Porricondylini (Diptera: Cecidomyiidae: Porricondylinae) of Sweden revisited: descriptions of nineteen new species of ten genera, including a new genus, Zootaxa 4728 (2), pp. 151-182 : 166

Paurodyla serrata sp. nov.

Figs 25–28

Diagnosis. This new species differs from P. tyresta Jaschhof , the only congener, in several details of the male genitalia, as follows. The parameres of P. serrata have serrate outer edges ( Fig. 27 , ↓ 1) and straight, posteriad directed apices, whereas the parameres of P. tyresta are tusk-shaped with dorsad bent apices ( Jaschhof & Jaschhof 2013: fig. 140A). The ventral gonostylar lobe of P. serrata , which is covered in dense, large microtrichia ( Fig. 25 , ↓ 2), has a flat tooth along the inner edge that continues up to the dorsal lobe (↓ 3); in P. tyresta , the ventral lobe has ordinary, small microtrichia plus a tiny apical tooth ( Fig. 29 , ↓ 4), while the dorsal lobe has a separate, fingernail-shaped tooth apically (↓ 5).

Other male characters. Body size 1.6 mm. Head. Eye bridge without ommatidia at vertex. Antenna shorter than body. Scape and pedicel concolorous with flagellum. Circumfila on flagellomeres 1–10, evenly ring-shaped or slightly sinuous. Neck and node of fourth flagellomere equally long ( Fig. 28 ). Palpus slightly shorter than head height, 4 setose, subcylindrical segments, apical segment longest of all. Thorax. Pronotum with 1 seta; anepisternum non-setose; anepimeron with 2–3 setae. Wing markedly longer than body. Length / width ratio 3.1. Membrane fully setose. Venation as in P. tyresta ( Jaschhof & Jaschhof 2013: 292) . Legs. Foreleg: femur and tibia equally long, tibia 1.2 times as long as T 2. Acropods as in P. tyresta . Genitalia ( Fig. 26 ). Ninth tergite small, sparsely setose. Gonocoxal synsclerite with large setae ventrolaterally and dorsally; on the ventral side, setose and non-setose portions are separated by an interior, sclerotized rim forming a wide, inverted V; ventral emargination small, broadly U-shaped, bordered by a broad, darkly pigmented margin; gonocoxal processes present as short, sclerotized knobs at the base of the emargination; dorsal apodemes massive. Aedeagal apodeme clearly shorter than gonocoxae; ducts of accessory glands inconspicuous.

Etymology. The Latin adjective serrata means serrate, with reference to the saw-toothed parameres found in this species.

Type material. Holotype. Male, Sweden, Södermanland, Haninge, Tyresta National Park , Urskogsslingan , dry pine forest, 24 May–9 June 2005, Malaise trap, Swedish Malaise Trap Project (trap 3, collecting event 2101) (spn. CEC 2124 in NHRS) . Paratypes. 1 male, same data as the holotype (spn. CEC 2125 in SDEI) ; 1 male, Sweden, Västerbotten, Vindeln, Kulbäcksliden Experimental Forest, Gammnybränna , previous stand of spruce and larch trees 10 years after cutting, 18 June–9 July 2004, MT, SMTP (trap 56, collecting event 1265) (spn. CEC 2126 in NHRS) .

Remark on the occurrence. Paurodyla serrata and P. tyresta were found co-occurring at both the sites where specimens of the former were collected. This might indicate that species of Paurodyla depend on a similar resource, most likely a particular group of fungi.

Figures

FIGURES 25–29. Male morphology of Paurodyla serrata (25–28) and Paurodyla tyresta (29). 25: Gonostylus, ventral, holotype. 26: Genitalia, ventral, holotype. 27: Parameres and aedeagal apodeme, ventral, holotype. 28: Fourth flagellomere, lateral, holotype. 29: Gonostylus, dorsal, specimen from Sweden. Scales 0.05 mm. Arrows refer to characters described in the diagnosis