Phytosciara (Dolichosciara) brachygaster Steffan, 1969

Broadley, Adam, Kauschke, Ellen & Mohrig, Werner, 2019, Revision of the black fungus gnat species (Diptera: Sciaridae) described by W. A. Steffan from Micronesia, Zootaxa 4683 (2), pp. 215-241 : 231-232

Phytosciara (Dolichosciara) brachygaster Steffan, 1969

( Fig. 12 A–E, 13 A–B)

Phytosciara brachygaster Steffan, 1969 [ Steffan 1969: 709–711, fig. 16 a–j].

Material studied: Holotype: Male, 26.v.1957, Micronesia, Palau Is., Airai, Ngerimal R., Babelthuap I., tree fern ravine, sweeping, leg. C.W. Sabrosky ( USNM 70562 ) . Paratypes: 1 male, September 1952, Micronesia, Palau Is. , Aluptagel (Aurapushekaru), leg. N.L.H. Krauss (USNMENT 2083360) ; 1 male, 19.i.1953, Tamatamanakir , light trap, leg. J.L. Gressitt ( BPBM) ; 1 male, 2.v.1957, Palau Is. , Malakal, leg. C.W. Sabrosky ; 1 male, 6.i.1953, Ponape, Colonia , Agriculture Experiment Station, light trap, leg. J.L. Gressitt ; 1 male, 13.xii.1952, Palau Is. , Ngarmalk (Auluptagal), leg. J.L. Gressitt ( BPBM) .

Further material: 1 male, 26.v.1957, Micronesia, Palau Is. , Airai, Ngerimal R., Babelthuap I., sweeping, leg. C.W. Sabrosky ( PWMP) ; 1 male, 22.i.1948, Micronesia, Palau Is. , Koror Island, limestone ridge, H.S. Dybas ; 1 female, 26.iv.1957, Micronesia, Palau Is. , Koror Island, limestone ridge, lg. C.W. Sabrosky ; 1 female, 8.xii.1952, Micronesia, Palau Is. , Babelthuap I., sweeping, leg. J.L. Gressitt (all in BPBM) .

Conservation status: All specimens embedded in Hoyer’s medium are somewhat depressed and the medium is more or less turbid. The main structures for determination are slightly deformed.

Comments. The species is characterized by a few bristles on the front (forehead) before the eye bridge, brownish antennae with bicoloured necks; 4 th flagellomere with a l/w index of 2.5; short C, a long y without macrotrichia, strongly toothed claws, darkened distal parts of the meso and metacoxae, hypopygium without an intergonocoxal lobe or bristle-patch, gonocoxites with 2 macrosetae, an elongate gonostylus, densely covered with short bristle-like hairs at the apex and 4–5 short and fine hyaline spines at the end of the apical hair on the inner side, tegmen short and simple. Body size: 3.5 mm.

Distribution. Caroline Islands ( Palau, Pohnpei).

Figures

FIGURE 12 A–E. Phytosciara brachygaster Steffan, 1969. Paratype.A. Hypopygium; B. Flagellomeres 3–5; C. Wing; D.Apex of fore tibia; E. Toothed claw.