Pseudosmittia laticauda, Ferrington Jr & Saether, 2011

Ferrington Jr, Leonard C. & Saether, Ole A., 2011, A revision of the genera Pseudosmittia Edwards, 1932, Allocladius Kieffer, 1913, and Hydrosmittia gen. n. (Diptera: Chironomidae, Orthocladiinae) 2849, Zootaxa 2849 (1), pp. 1-314 : 259-261

Pseudosmittia laticauda sp. n.

( Fig. 98 A–D )

Type locality: USA: New York, Montauk Lake .

Type examined: Holotype male, USA: New York, Suffolk Co., Montauk Lake , 17.viii.1946 ( USNM).

Diagnostic characters: The broad, parallel-sided anal point, together with the long, pointed median volsella and the sharply pointed inferior volsella with rounded accessory lobe separate the male imago from other species of the genus.

Male imago (n = 1)

Total length 3.11 mm. Wing length not measurable. Coloration brown

Head ( Fig. 98 A ). Antenna lost. Temporal setae 5, consisting of 2 inner verticals and 3 outer verticals. Clypeus with 4 setae. Tentorium 96 µm long, 23 µm wide. Cibarial pump and stipes as in Fig. 98 B . Stipes 87 µm long, 34 µm wide. Lengths of first three palpomeres (in µm): 21, 30, 69, apical palpomeres lost, third palpomere as in Fig. 109 C .

Thorax. Antepronotum with 4 lateral setae. Dorsocentrals 11, acrostichals 2, prealars 4. Scutellum with 6 setae.

Wing ( Fig. 98 C ). Only one wing present. Costal extension 34 µm long. R 4+5 ending slightly distal to apex of M 3+4; Cu 1 slightly curved. R 4+5 without setae, other veins not clear.

Legs.Lost

Hypopygium ( Fig. 98 D ). Anal point 37 µm long, 14 µm wide medially, completely free of microtrichia, but with a few lateral setae. Tergite IX with 10 setae, laterosternite IX with 5 setae. Transverse sternapodeme 50 µm long, no oral projections. Virga ( Fig. 98 E ) 11 (?) µm long. Gonocoxite 144 µm long; superior volsella 23 µm long, median volsella 41 µm long, inferior volsella 25 µm long. Gonostylus 71 µm long, with dense microtrichia on inner margin; megaseta 9 µm long. HR 2.05, HV 3.12.

Female, pupa and larva

Unknown.

Remarks

Although the specimen is incomplete, the genitalia is so special that it warrants description. This and the preceding species may deserve a different placement when the other stages are known.

Distribution

The species is only known from the type locality in New York .

Figures

FIGURE 98. Pseudosmittia spp., male. A–D. P. laticauda sp. n., male. A—head; B—cibarial pump and stipes; C—apex of wing; D—hypopygium, left dorsal aspect, right ventral aspect.; E—virga. F–K. P. longicornia sp. n., male. F—head; G—wing; H—third palpomere; I—cibarial pump and stipes; J—hypopygium. left dorsal aspect, right ventral aspect; K—virga.

FIGURE 109. Pseudosmittia spp., male hypopygia. A–C. P. roquei Andersen, Saether et Mendes; A—hypopygium, dorsal view; B—hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right; C— gonostylus. D–G. P. cambuciensis Andersen, Saether et Mendes. D—hypopygium, dorsal view; E—hypopygium with anal point and tergite IX removed, dorsal aspect to the left and ventral aspect to the right; F—median volsella, dorsal view; G— gonostylus. (From Andersen et al., 2010.)