Allocladius bothnicus (Tuiskunen) 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 : 93-96

Allocladius bothnicus (Tuiskunen) comb. n.

( Fig. 29 , 30 A–E )

Lindebergia bothnica Tuiskunen, 1984: 21 .

Pseudosmittia bothnica (Tuiskunen) ; Saether & Ferrington 2003: 3; Makarchenko & Makarchenko 2007: 306; Makarchenko & Makarchenko 2008: 216.

Material examined: FINLAND: Ob Hailuoto Vesaniityt , holotype male, 1.vii.1972, B. Lindeberg ( ZNH Type No. 14355) .

Diagnostic characters: It differs from other species with pars ventralis by having a much longer anal point, no superior volsella, and no accessory lobe of the inferior volsella. The pupa differ from other known members of the genus by not having the genital sac ending in a papilla and tergal conjunctive II/III with few spinules. The larva has 3 inner teeth on the mandible and 4 pairs of teeth on the mentum.

Male imago (n = 1)

All measurements are within the range of variation of A. nanseni with the following exceptions and additions: Supraalar seta not observed; R 4+5 end slightly distal to the apex of M 3+4 ( Fig. 29 A ); Cu 1 sinuate; R without setae; spurs on front tibia 50 µm long; SV 2 4.96; BR 1 2.3; BR 2 2.3; anal point ( Fig. 29 E , Tuiskunen 1984, fig. 1) 80 µm long, with 30 µm long basal part with setae and microtrichia, 25 µm long median part and more pointed 25 µm long bare apical part; tergite IX with 12 setae; pars ventralis ( Fig. 29 G ) 62 µm long; gonocoxite without superior volsella; inferior volsella tongue-like, reaching to 0.61 gonocoxite length, no accessory lobe; gonostylus with preapical, triangular crista dorsalis; HR 2.14; and HV 2.95.

Pupa

The immatures recently have been described by Makarchenko and Makarchenko (2007). Tergal conjunctives IV/V– VI/VII in male, III/IV–VI/VII in female and sternal conjunctives VI/VII–VII/VIII have 3–4 rows of spinules. According to E. Makarchenko (pers. comm.) the frontal apotome is without warts, spines or tubercles; hair-like, about 15 µm long frontal setae are present on frontal apotome; the posterior 3–4 dorsocentrals are not grouped together; the anal lobe is bare and carries 2-4 reduced, hair-like anal setae and 1 median seta. The genital sacs ( Fig. 30 A ) are without apical papilla.

Larva

The larva differ from the other known Allocladius by having only 3 inner teeth on the mandible ( Fig. 30 D ), only 4 lateral teeth on the mentum ( Fig. 30 E ), and no anal seta. It also appear to differ from all known larvae of the Pseudosmittia group by having the antennal blade no longer than the flagellum ( Fig. 30 B ) and long bifid setae submenti. According to E. Makarchenko (pers. comm.) the larva differ from other known larvae of the Pseudosmittia group of genera except P. simplex by lacking a premandibular brush, the anterior parapods have few longer claws and the anal tubules are without constrictions.

Distribution

The species is known from Finland, The Netherlands and Russia including the Far East ( Saether & Spies 2004; Makarchenko & Makarchenko 2007, 2008).

Figures

FIGURE 29. Allocladius bothnicus (Tuiskunen) comb. n., male. A—wing; B—head; C—third palpomere; D—cibarial pump and stipes; E—hypopygium, left dorsal aspect, right ventral aspect; F—virga; G—pars ventralis.

FIGURE 30. Allocladius spp. A–E, A. bothnicus (Tuiskunen), immmatures. A—male genital sheath of pupa; B—larval antenna; C—premandible; D—mandible; E—mentum. F–G, A. scrotus Andersen, Saether et Mendes. F—hypopygium; G— pars ventralis [A–E after Makarchenko & Makarchenko 2007, F–G from Andersen et al. 2010].