Allocladius Kieffer

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 : 45

Allocladius Kieffer

Allocladius Kieffer, 1913: 28 .

Allocladius Kieffer ; Freeman and Cranston (1980: 181), Ashe (1983: 10), Andersen et al. (2010).

Lindebergia Tuiskunen, 1984: 121 .

Prosmittia Brundin sensu Cranston and Oliver (1988: 449) , pro parte, misidentification. Oliver (1963:177); Saether et al. (1984: 270). See Saether and Ferrington (1993).

Pseudosmittia auct. nec Edwards.

Type species. Allocladius niger Kieffer, 1913 .

Other included species. A. aizaiensis (Wang) comb. n., A. arenarius (Strenzke) comb. n., A. azoricus (Storå) comb. n., A. bilobulatus (Edwards) , A. bothnicus (Tuiskunen) comb. n., A. bubatus sp. n., A. caspersi sp. n., A. conigerus (Freeman) comb. n., A. deborae sp. n., A. fortispinatus (Edwards) , A. globosus Andersen, Saether et Mendes , A. hirticaudatus sp. n., A. jintuoctavus (Sasa) comb. n., A. longicrus (Kieffer) comb. n., A. lusciniolus Saether et Andersen sp. n., A. nanseni (Kieffer) comb. n., A. neobilobulatus (Paggi) , A. quadrus Andersen, Saether et Mendes, A. rectilobus (Freeman) comb. n., A. salti (Freeman) comb. n., A. scrotus Andersen, Saether et Mendes , A. soemmei sp. n., A. wangorum sp. n., A. wirthi (Freeman) comb. n.

Diagnostic characters. The imagines are separable from other Orthocladiinae with bare eyes, wings and squama, by having 4–16 short non-scalpellate acrostichals on mid-scutum without additional tubercle (except A. fortispinatus with apparently only 2 acrostichals), hump or microtrichial tuft; non-extended, non-protruding eyes; antepronotal lobes not reduced medially or occasionally slightly reduced; supraalars usually present, palp not reduced; anal lobe of wing mostly well developed, costa not to moderately long extended, VR high, but usually lower than 1.50, Cu 1 sinuate to slightly curved, no bifurcation of postcubitus; male anal point placed forward on tergite IX (absent in A. longicrus only), on microtrichiose and setose base, apical part short to long, parallel-sided to slightly tapering, free of microtrichia at least at apex (except in A. wirthi ); single, plate- to spine-like, median virga, occasionally with additional lateral groups of spinules ( A. nanseni ); pars ventralis often present; superior volsella absent or more often present and bulge-like; male gonostylus simple; female genitalia with gonocoxite IX long and low with characteristic sclerotized margin against tergite IX, without long caudal extension; tergite IX divided except in A. bilobulatus ; small dorsomedian lobe, large ventrolateral lobe; seminal capsules mostly pale, and spermathecal duct with loop.

The pupae can be separated from other orthoclads by lacking a thoracic horn and a precorneal tubercle, having short frontal setae on frontal apotome, reduced or smoothly rounded anal lobe with fine hair-like anal macro-setae; three precorneals and two median antepronotals all fine and hair-like, conjunctives both dorsally and ventrally armed with similar-sized spinules. Tergites II–VII with anterior and posterior spinules clearly larger than median spinules, resulting in a transversely striped appearance. Sternites I–IV shagreened with relatively extensive spinules at least on III–IV.

The larvae are separable from all other orthoclads except Camptocladius v. d. Wulp, Pseudosmittia Edwards and Hydrosmittia gen. n. by having broad, bifid S I and S II, reduced antenna and no procerci. They differ from Camptocladius by having posterior parapods with claws, and premandible with brush (absent in A. bothnicus ?). From Pseudosmittia they differ by having posterior parapods with 7–12 claws, mandible with 4 inner teeth or 3 in A. bothnicus , and antennal blade extending beyond flagellum at most about as long as width of basal segment. From Hydrosmittia all, except A. bothnicus , differ by having mandible with 4 inner teeth combined with about 40– 50 longer claws on anterior parapods. They have a mentum with 5 pairs of lateral teeth or 4 in A. bothnicus and Allocladius sp. “Falkland”, 1–3 anal setae, posterior parapods longer than or as long as in A. bothnicus , anal tubules (70 –195 µm long, or about 52 µm in A. bothnicus ) and anal tubules without constrictions.