Orthocladius oblidens
Creators: name: Rossaro, Bruno
name: Casalegno, Carlotta
Publisher: name: Zenodo
Year: 2001
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Orthocladius
Orthocladius oblidens

description: <i>Orthocladius oblidens</i> (Walker, 1856) <i>O. oblidens</i> (Walker, 1856) <i>O. lenzi</i> Kieffer, 1924 (Langton &amp; Cranston 1991) <i>Orthocladius</i> sp A Pinder, 1978 (Langton, 1991: 184; Langton &amp; Cranston 1991) Orthocladius Pe 2 Langton, 1984: 150 (Langton &amp; Cranston 1991) nec Chironomus <i>oblidens</i> Walker, 1856, sensu Langton, 1984: 154 (Langton &amp; Cranston 1991) <i>O. pinderi</i> Rossaro <i>&amp;</i> Prato, 1991 <b>Syn.</b> n. DESCRIPTION. See Langton <i>&amp;</i> Cranston (1991, Fig. 1 h, 2 f, 4 h) and Rossaro <i>&amp;</i> Prato (1991, Fig. 20, 21, 22, sub <i>O. pinderi</i>). Thoracic horn 335­470 m long. Hook row on <i>TII</i> not very extended (135­200 m wide). Pedes spurii B well developed. <i>TII</i> only with small points present on the posterior field. Points on <i>TIII­VI</i> with posterior points about the same size or larger than median points. <i>TIII</i> with the anterior and lateral part of tergite devoid of points. The posterior point band of <i>TIII­IV</i> extending further laterally than the apical band. T <i>IV­VI</i> leaving an antero­median bare area with points extending to the antero­lateral corner, diminishing in size; the median points somewhat larger than the more lateral, showing as a more or less circular area within the point patch. Frequently setae on S <i>II­III</i> branched. Pedes spurii A present on S <i>IV­VII</i>. Only very weak points present on T <i>VII</i> and on <i>SVI</i> at caudal margin. Lateral setae very short and weak. Robust taeniate extensions at the tip of anal lobes present. Apical setae of anal lobes not hooked at tips and short (95­150 m long), less than half the lobe length (350­450 m), anal lobes 315­375 m wide. COMMENTS. The adult male was described and figured by Pinder (1978, p. 72, Fig. 113 A) and labelled <i>Orthocladius</i> sp. a. The pupal exuviae was described by Langton (1984: 150) and labelled <i>Orthocladius</i> Pe 2. Pinder (1978) stated that it resembled the species figured and determined by Brundin (1947) as <i>O. oblidens</i> (Walker, 1853). The examination of Walker's holotype (Pinder 1978) suggested that it was different from the species figured by Brundin (1947), so <i>O. oblidens</i> (Walker) sensu Brundin was designated by Pinder (1978) as a different species (= <i>Orthocladius</i> sp. a), but it was not given a name. Rossaro <i>&amp;</i> Prato (1991) reared pupae and obtained pupal exuviae identical to the ones described by Langton (1984, 1991) and adult males identical to the ones figured by Brundin (1947) and Pinder (1978). This lead Rossaro &amp; Prato (1991) to give a name to <i>Orthocladius</i> sp. a Pinder, <i>O. pinderi</i>. Langton &amp; Cranston (1991) emphasised that the differences in male hypopygia between <i>O. oblidens</i> and <i>Orthocladius</i> sp a Pinder were untenable; the latter was stated as a junior synonym of the former; the synomymy between <i>O. pinderi</i> and <i>O. oblidens</i> is here confirmed as a consequence. MATERIAL EXAMINED: <b>ITALY</b>: PIEMONTE: Po river, Pontestura, 13 / 12 // 1983, 1 Pex; Trino Vercellese, 10 / 11 / 1967, 1 Pex. LOMBARDIA: Po river, Pieve Porto Morone, 3 / 5 / 1980, 1 Pex; 29 / 5 / 1980, 1 Pex; Bardello stream, 15 / 5 / 1979, 1 Pex; Endine lake, st. G 4, 25 / 2 / 1981, 1 Pex; Serio river, Ricengo, 24 / 5 / 1999, 1 Pex; 28 / 6 / 1999, 1 Pex; 27 / 9 / 1999, 1 Pex; 23 / 1 / 2000, 1 Pex; 18 / 2 / 2000, 1 Pex; 23 / 3 / 2000, 1 Pex; 15 / 4 / 2000, 1 Pex; Lambro river, Asso, 16 / 11 / 1977, 1 Pex; a pond near Cesano Maderno, Milano, 3 / 2001, 1 Pex; Ticino river, Castelletto di Cuggiono, 26 / 3 / 2001, 1 Pex. EMILIA ROMAGNA: Aveto lake 1 / 5 / 1986, 1 Pex; Po river, Corso, 12 / 1975, 1 Pex; 5 / 1977, 1 Pex; 21 / 11 / 1978, 1 Pex; 2 / 7 / 1979, 1 Pex; Isola.Serafini, 18 / 12 / 1980, 1 male /Pex/Lex; Adda river, Porto d'Adda, 13 / 12 / 1983, 1 Pex. Tributary of Taro river, Bedonia, 15 / 5 / 2001, 1 Pex. MARCHE: Potenza river, st, 2, S.Severino, 8 / 4 / 1986, 1 Pex. LAZIO: Velino river, Antrodoco 11 / 3 / 1990, 1 Pex; 17 / 3 / 1990, 1 Pex; 17 / 3 / 1990, 1 Pex. ABRUZZO: Aterno river, Coppito, 9 / 3 / 1992, 1 Pex; a spring loc. Ovindoli, Fucino, 6 / 5 / 1989, 1 Pex; Vetoio spring, 19 / 3 / 1992, 1 Pex; 13 / 5 / 1992, 1 Pex; 27 / 5 / 1992, 1 Pex; Zittola stream, 26 / 5 / 1992, 1 Pex.
description: Published as part of <i>Bruno Rossaro &amp; Carlotta Casalegno, 2001, Description of the pupal exuviae of some species belonging to Orthocladius s. str. van der Wulp, 1874 (Diptera: Chironomidae: Orthocladiinae), with a new key to species of West Palaearctic region, pp. 1-20 in Zootaxa 7</i> on pages 8-9, DOI: 10.5281/zenodo.4618447
description: {"references": ["Langton, P. H. &amp; Cranston, P. S. (1991) Pupae in nomenclature and identification: West Palaearctic Orthocladius s. str. (Diptera: Chironomidae) revised. Systematic Entomology, 16, 239 - 252.", "Pinder, L. C. V. (1978) A key to adult males of British Chironomidae. Freshwater Biological Association Scientific Publication, 37, 1 - 169.", "Langton, P. H. (1984) A Key to Pupal Exuviae of British Chironomidae. Privately published by the author. 324 pp.", "Rossaro, B. &amp; Prato, S. (1991) Description of 6 new species of the subgenus Orthocladius (Orthocladius) v. d. W. Fragmenta entomologica, 23, 59 - 68.", "Brundin, L. (1947) Zur Kenntnis der schwedischen Chironomiden. Arkiv fur Zoology, 39, 1 - 95."]}