Cricotopus annuliventris Skuse

Cricotopus annuliventris (Skuse). (Figs 1 C, 2 C, 4 C, 5 E, 6 B, 7 D, 8 C, 10 C) Orthocladius annuliventris Skuse, 1889: 255 Cricotopus annuliventris (Skuse); Freeman, 1961: 646. Cricotopus annuliventris (Skuse); Drayson, 1992: 81. Cricotopus annuliventris (Skuse), Cranston 1996: 86 Type material. Lectotype ♂ here designated: AUSTRALIA: Lawson [no further data, specimen ex-Macleay collection] slide-mounted in Euparal from dry specimen by Cranston. Pinned specimen bears red Lectotype label ��� Orthocladius annuliventris Skuse��� in black ink, but designation (by unknown person) appears to be unpublished. Paralectotype, ♂ as Lectotype. Other material examined. Qld.: Pe, Eungella NP, Mt Dalrymple,? Cattle Ck., 21 ��02S 148 �� 35 'E, 22.iii. 1998 (Cranston). NSW: ♂, Le/Pe/♀, Sugarloaf Ck., Clyde Mt., 35 �� 33 'S 149 �� 58 'E, 10.i. 1988 (Cranston); 1 Pe, Albury, Murray R. Stn 6, 36��06'S 147 ��01'E, 17.v. 1989 (Cook); 2 Pe, Jindabyne, Rush's Ck., 12.xii. 1987 (Cranston); 8 ♂, Le/Pe/♀, 3 Pe, Rutherford Ck., Brown Mt., 36 �� 36 'S 149 �� 47 'E, 17.xii. 1990 (Cranston). ACT: 2 ♂, ♀, Canberra, Black Mt., 35 �� 17 'S 149 ��05'E, 29.vii. 1989 (Reid); 3 ♂, 4 ♀, Corin Rd, Gibraltar Falls, 35 �� 28 'S 148 �� 55 'E, 29.x. 1990 (Drayson). Vic: Pe, Wodonga, House Ck. up-stream, 36 �� 10 'S 146 �� 52 'E, 19.xii. 1989 (Cook); Pe, Mitta R., 10km E. Mitta, 36 �� 32 'S 147 �� 25 'E, 30.x. 1989 (Cook). SA: ♂, 4 L, Cox Ck., Bonython Rd, 29.ix. 1989 (Madden); ♂, 2 L, Piccadilly Valley, Vince Ck., 29.ix. 1989 (Madden). Molecular material. NSW: L, Kosciuszko NP, sphagnum bog, 36 �� 26 'S 148 �� 20 'E, 2���3.xii. 2010 (Cranston) (Mv-NSWKos 1); L, Kosciuszko NP, stream next to Wright's Ck., nr 36 �� 7 'S 148 �� 20 'E, 3.xii. 2010 (Cranston) (Mv- KNPCric 8); P, Kosciuszko NP, Wragge's Ck., 36 �� 23 'S 148 �� 27 'E, 1.xii. 2010 (Cranston) (Mv-KNPCric 13); 3 L, Warrumbungles, Castlereaigh R., 31 �� 16 'S 149 �� 11 'E, 27.vii. 2005 (Cranston) (Mv-NSW 2 M1, 2, 5). ACT: ♂, P, Condor Ck., 35 �� 22 'S 148 �� 51 'E, 14.vi. 2012 (Cranston) (Mv-ACTCon 6, 7). Vic: L, Dobson���s Lane, Dandenong Ck., 37 �� 50 'S 145 �� 19 'E, 24.x. 2006 (Carew) (Mv-DOL 3). SA: L, P, ♀, below Hindmarsh Falls, Hindmarsh R., 35 �� 26 'S 138 �� 58 'E, 3.x. 2013, 220 m asl (Krosch & Cranston) (Mv-HF 3, HFP 1, SAHF 3.1); 2 L, Deep Creek Conservation Park, Tapanappa Rd, 35 �� 36 'S 138 �� 14 'E, 3.x. 2013, 260 m asl (Krosch) (Mv-DC1, 4). Tas: Mt Field NP, Russell Falls Ck., 42 �� 40 'S 146 �� 42 'E, 3.xii. 2013, 196 m asl (Krosch) (Mv-TAS13.9.2). Description. MALE (Figs 1 C, 2 C) 2.8���4.2 mm. Head. Ant 832���1088 ��m; Fl 1���12 392���480 ��m, Fl 13, 416 ��� 448 ��m. A.R. 0.91���1.19. Palp 424���592 ��m. 2 Fr; 6���10 Po. Thorax. Uniform mid- to dark brown. Lapn 1���5, Ac 15���28, Dc 18���25, Pa 2���4, Scts 6���10. Wings. 2.0��� 2.7 mm. Sq 7���15, R 2���9. Legs. Femora mid-brown: tibiae of fore and mid-legs with white ring on proximal third. Distal 2 / 3 of fore and mid-tibiae, all of hind tibia and all tarsomeres mid-brown. Abdomen. TI very pale; broad anterior pale bands on TII, IV,V, and VI, not III; narrow posterior pale bands on TIV, V, and VI; otherwise mid- to dark brown. Hypopygium (Fig. 2 C). Gcx 180���250 ��m, iv rounded and usually notched posteriorly. Gst 66���100 ��m, about 2 / 5 Gcx (0.35���0.45); crista dorsalis large, bare and hyaline. FEMALE (n= 6). As in male except: 4.1���4.3 mm. Head. Ant 337���428 ��m. Palp 544���644 ��m. Wing. 2.0��� 2.7 mm. Sq 8���13, R + R 1 17���19, R 4 + 5 13���15. Abdomen. As male. Genitalia. Spermathecae comprising mid-brown, spheroid capsules, with very narrow "neck" and recurved ducts (Fig. 4 C). PUPA (Figs 7 D, 8 C). 3.5���4.7 mm, pale brown to very pale, almost hyaline. Cephalothorax. Slightly rugose dorsally. Th 56���114 ��m; hyaline, cylindrical, tapered to point, covered with sparse scales, especially distally. 0 Fs. Abdomen. PSB on II and sometimes much reduced on III. Hook row on T II always Remarks. Adults of this species can be distinguished by the pale bands on legs being restricted to the fore and mid-tibiae, and by pale bands on abdomen TII, IV and V, but not on III. Pupae can be recognised by lack of frontal setae, presence of medio-lateral spinule fields on TII with none developed as a spine band, and with 4 long Ls on VIII. Larvae can be recognised by a combination of mandible with smooth outer and serrate inner surfaces, antenna length less than 90 ��m, and AR less than 1.64. Adult specimens perfectly fit the descriptions of Freeman (1961) and Hergstrom (1974). A highly genetically divergent larval form is recognized from three specimens from the Castlereaigh River (Warrumbungles, NSW). These specimens do not cluster with other C. annuliventris (Krosch et al., submitted), but form a group unto themselves, and with some relationship to both C. annuliventris and C. tasmania. On morphology these larvae key to C. annuliventris, but may be differentiated by the mandible pigment extending to the base with less strong contrast to the mid-brown head capsule, a narrow mola, a broad rounded median mentum tooth and second lateral mentum teeth no smaller than the first laterals. C. annuliventris is restricted to south-east Australian cool streams, often at elevation and shaded. All sites are unpolluted.
Published as part of Drayson, Nick, Cranston, Peter S. & Krosch, Matt N., 2015, Taxonomic review of the chironomid genus Cricotopus v. d. Wulp (Diptera: Chironomidae) from Australia: keys to males, females, pupae and larvae, description of ten new species and comments on Paratrichocladius Santos Abreu, pp. 1-40 in Zootaxa 3919 (1) on pages 8-10, DOI: 10.11646/zootaxa.3919.1.1, http://zenodo.org/record/287861
{"references":["Skuse, F. A. A. (1889) Diptera of Australia. Part VI. The Chironomidae. Proceedings of the Linnean Society of New South Wales, 2, 215 - 311.","Freeman, P. (1961) The Chironomidae (Diptera) of Australia. Australian Journal of Zoology, 9, 611 - 737. http: // dx. doi. org / 10.1071 / ZO 9610611","Drayson, N. (1992) A taxonomic revision of the Australian Cricotopus (Diptera: Chironomidae). Unpublished MSc thesis, Division of Botany and Zoology, Australian National University, Canberra. [total page number unkown]","Cranston, P. S. (1996) Identification Guide to the Chironomidae of New South Wales. AWT Identification Guide, Number 1, 1 - 376. [Australian Water Technologies Pty Ltd, Sydney]","Hergstrom, I. (1974) The taxonomy and general biology of some southern Australian Chironomidae (Diptera: Nematocera). Unpublished PhD thesis, University of South Australia. [total page number unkown]"]}