Allocladius hirticaudatus, 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 : 57-59

Allocladius hirticaudatus sp. n.

( Fig. 11 B–G )

Type material: Holotype male, TANZANIA: Tanga, West Usambara Mountains , ix. 1990, ZMBN's Tanzania Expedition ( ZMBN Type No. 433).

Diagnostic characters: The long, nearly parallel-sided anal point with laterally directed strong setae near the apex will separate the male imago from other species of Allocladius .

Etymology: From the Latin hirtus, rough, hairy, and caudata, having a tail, referring to the setose long anal point.

Male imago (n = 1)

Total length 1.69 mm. Wing length 1.01 mm. Total length/wing length 1.69. Wing length/length of profemur 2.55. Coloration pale brown with darker brown vittae, preepisternum, scutellum and postnotum.

Head ( Fig. 11 D ). AR 0.83. Terminal flagellomere 270 µm long. Temporal setae 7, consisting of 4 inner verticals, 2 outer verticals and 1 postorbital. Clypeus with 6 setae. Tentorium 105 µm long, 16 µm wide. Cibarial pump and stipes as in Fig. 11 B . Stipes 91 µm long, 27 µm wide. Palpomere lengths (in µm): 21, 27, 66, 66, 69. Third palpomere ( Fig. 11 E ) with 2 sensilla clavata.

Thorax. Median antepronotal lobes well developed, antepronotum with 1 lateral seta. Dorsocentrals 7, acrostichals 6, prealars 2, supraalar 1. Scutellum with 4 setae.

Wing ( Fig. 11 C ). VR 1.31. Anal lobe reduced. Costal extension 71 µm long. R 4+5 ending above apex of M 3+4; Cu 1 slightly sinuate. Brachiolum with 1 seta, other veins bare.

Legs. All tarsi and front tibia lost. Spurs of middle tibia 18 µm and 14 µm long, of hind tibia 34 µm and 16 µm long. Width at apex of middle tibia 25 µm, of hind tibia 30 µm. Comb of 10 setae, 21–30 µm long. Lengths (in µm) of front to hind femora: 396; 414; 437; of middle tibia 392; of hind tibia 491.

Hypopygium ( Fig. 11 F ). Anal point 32 µm long, nearly parallel sided, with conspicuous apical setae, no microtrichia at extreme apex, tergite IX with 8 setae, including 6 on anal point; laterosternite IX with 5 setae. Phallapodeme 48 µm long; transverse sternapodeme 48 µm long, with barely projecting oral projections. Virga ( Fig. 11 G ) 7 µm long. Gonocoxite 112 µm long; superior volsella absent, inferior volsella low, accessory lobe weak and reaching to 0.59 and 0.69 gonocoxite length, respectively. Gonostylus 58 µm long; crista dorsalis triangular, preapical; megaseta 9 µm long. HR 1.92, HV 2.93.

Female, pupa and larva

Unknown.

Remarks

The hypopygium of this species looks strikingly different from all other members of the Pseudosmittia complex. However, the acrostichals, the supraalar seta, wing venation, virga and other features all are characteristic of Allocladius .

Distribution

The species is known only from the type locality, a mountain locality in Tanzania .

Figures

FIGURE 11. Allocladius spp., males. A—A. jintuoctavus (Sasa) comb. n. B—G. A. hirticaudatus sp. n. B—cibarial pump and stipes; C—wing; D—head; E—third palpomere; F—hypopygium, left dorsal aspect, right ventral aspect; G—virga.