Orthocladius ticinoi Rossaro &amp; Prato 1991
Creators: name: Rossaro, Bruno
name: Casalegno, Carlotta
Publisher: name: Zenodo
Year: 2001
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Chironomidae
Orthocladius
Orthocladius ticinoi

description: <i>Orthocladius ticinoi</i> Rossaro <i>&amp;</i> Prato, 1991 <i>O. ticinoi</i> Rossaro <i>&amp;</i> Prato, 1991 <i>Orthocladius</i> Pe 7 Langton, 1984: 155 (Langton 1991: 190 a tentative synonym) nec <i>O. glabripennis</i> Goetghebuer, 1921, sensu Rossaro 1991 DESCRIPTION. See Rossaro <i>&amp;</i> Prato (1991, Fig. 17, 18). Colour pale transparent. Frontal warts not developed. Thoracic horn slender at apex, 240­420 m long, with points less developed than in <i>O. obumbratus</i>. Thorax moderately rough. Pedes spurii B developed. On T <i>II</i> only posterior point field present. <i>TIII</i> with posterior points not extended laterally beyond apical points. Points on <i>TIII­VI</i> limited to a central trapezoidal area; there is a sudden drop in point size to antero­lateral points. Posterior points on <i>TIII­VI</i> and apical points on <i>TIII­V</i> more developed than the anterior ones, onT <i>IV</i> <i>­</i> <i>VI</i> anterior points more developed than the median ones. <i>SII­IV</i> with more or less extended fields of very small grouped points. Pedes spurii A present on S <i>IV­VII</i>. Lateral setae: 1 on segment <i>I</i>, 3 on segments <i>II­VI</i>, 4 on segment <i>VII</i> and 5 on segment <i>VIII</i>. Anal lobes with small colourless apical taeniate extensions of cuticle, at most 30 m long, with the shape of small colourless teeth (Fig. 2.3), laterally in addition very small apical extensions may be present. Anal macrosetae 225­265 m long, anal lobes 325­420 m long, 350­490 m wide. COMMENTS. The species can be easily separated from <i>O. obumbratus,</i> in which well sclerotized extensions of cuticle at the tips of anal lobes, resembling spurs, are observed. Rossaro (1991) synonymized <i>O. ticinoi</i> with <i>O. glabripennis</i> (= <i>Orthocladius</i> Pe 5), because of the presence of small and colourless teeth (Langton <i>&amp;</i> Cranston 1991), but apical taeniate extensions of cuticle apparently are always absent in <i>O. glabripennis</i> and there is no variation within the species in this respect, <i>O. glabripennis</i> is a lentic species, <i>O. ticinoi</i> is restricted to running waters besides this. The conclusion is that specimens with small colourless apical taeniate extensions of cuticle do not belong to <i>O. glabripennis</i>, but to <i>O. ticinoi</i>, which is a separated species. According to Langton (1991) description, <i>O. ticinoi</i> be identical with <i>Orthocladius</i> Pe 7 Langton 1984: 155. MATERIAL EXAMINED: <b>FRANCE</b>: GARONNE river, 10 / 3 / 1997, 1 Pex. <b>ITALY</b>: LOMBARDIA: Brembo river, 26 / 2 / 2001, 1 Pex; Serio river, Ricengo, 18 / 2 / 2001, 1 Pex; 23 / 3 / 2000, 1 Pex; Ticino river, Oleggio, 16 / 2 / 1995, 1 Pex; Boffalora, 11 / 1 / 1981, 1 Pex, 25 / 1 / 1981, 1 Pex, 1 / 5 / 1981, 1 Pex, 11 / 2 / 1993, 1 Pex; Castelletto, 14 / 2 / 2001, 9 Pex; 5 / 3 / 2001, 1 Pex. EMILIA ROMAGNA: Po river, Caorso, 12 / 4 / 1977, 1 Pex; 13 / 12 / 1983, 1 Pex; Chiavenna stream, tributary of Po river, 10 / 4 / 1979, 1 Pex. ABRUZZO: Aterno river, Coppito, 28 / 2 / 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 14-15, DOI: 10.5281/zenodo.4618447
description: {"references": ["Rossaro, B. &amp; Prato, S. (1991) Description of 6 new species of the subgenus Orthocladius (Orthocladius) v. d. W. Fragmenta entomologica, 23, 59 - 68.", "Langton, P. H. (1984) A Key to Pupal Exuviae of British Chironomidae. Privately published by the author. 324 pp.", "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."]}