Dicranomyia (Dicranomyia) globosa, Billingham & Theischinger, 2022

Billingham, Zacariah D. & Theischinger, Gunther, 2022, New and Poorly Known Species of Crane Flies (Diptera: Limoniidae) from New South Wales, Australia, Records of the Australian Museum (Rec. Aust. Mus.) 74 (1), pp. 19-40 : 32

Dicranomyia (Dicranomyia) globosa sp. nov.

urn:lsid:zoobank.org:act:4AC026D2-6A76-463B-AD74-A3DBE6A918DF

Figs 29–32

Holotype ♂, Australia, New South Wales, Ku-Ring-Gai Chase, McCarrs Creek by Upper Gledhill Falls off McCarrs Creek Rd (33.663°S 151.250°E), 25 Sep 2017, Z. Billingham & G. Theischinger, AM (K.394963).

Description ♂ (♀ unknown).

Head. Antenna and palpus greyish brown. Antenna of moderate length, extending back to the prescutal pit, pedicel and flagellomeres 1–11 distinctly rounded, spherical, ultimate segment more conical.

Thorax ( Fig 29 ). Thoracic segments dorsally all dark brown, posterior areas of scutal lobes and scutellum a little lighter. Pleurites mostly uniform brown, propleuron and anepisternum a little darker. Coxae brownish, trochanters yellowish brown. Femora, tibiae, and first tarsal segment yellowish brown, darkening to greyish black at the tips, remaining tarsal segments greyish black.

Wing ( Fig. 30 ): brownish grey, extensively variegated with hyaline patches, veins brownish. Sc extending to nearly ⅓ length of Rs, sc-r some distance before its tip in alignment with the fork of Rs, m-cu situated a little more than half its length before the base of the discal medial cell. Halter with stem deep greyish, knob lighter grey.

Abdomen: greyish brown.

Terminalia ( Figs 31, 32 ). Hypopygium largely yellowish brown, lobes of inner gonostylus lighter yellowish white. T9 apically shallowly bilobed. Ventral lobe of gonocoxite rounded, about ½ the length of gonocoxite. Inner gonostylus approximately equal in length to gonocoxite, lobe rounded, globe-shaped, rostral prolongation of moderate length, lightly arched, tapering to a blunt tip, bearing two long spines at about ⅔ length of the prolongation. Outer gonostylus a strongly arched rod, narrowing gradually to a sharp tip. Aedeagus a little shorter than gonocoxite, the tip faintly bilobed, parameres about ¾ the length of the aedeagus, lateral lobe low and rounded, mesal lobe gradually tapering to a sharp curved tip.

Dimensions. Body length 6.8 mm, wing length 7.3 mm.

Etymology. This species is named with reference to the globose lobe of the inner gonostylus.

Discussion. Dicranomyia (D.) globosa is closely allied to numerous morphologically similar species around D. (D.) saxatilis Skuse, 1890 (see Theischinger 1994 for more details on these species). Dicranomyia (D.) globosa most closely resembles D. (D.) saxatilis , especially in the wing patterning, but is readily distinguished from D. (D.) saxatilis and other similar species by the long spines on the rostral prolongation of the outer gonostylus.

Figures

Figures 29–32. Dicranomyia (Dicranomyia) globosa sp. nov., male. (29) head and thoracic colouration, lateral; (30) wing; (31, 32) hypopygium, dorsal view.