258 research outputs found
Pseudosmittia fabioi Boggero, Zaupa & Rossaro, 2014 (Diptera: Chironomidae: Orthocladiinae) a new junior synonym of Prosmittia verae Krasheninnikov & Makarchenko, 2008
No full textPseudosmittia fabioi Boggero, Zaupa & Rossaro, 2014 was found to be conspecific with Prosmittia verae Krasheninnikov & Makarchenko, 2008 after examination of original description and illustrations. Accordingly, Ps. fabioi is placed in junior synonymy with Pr. verae, new synonymy. The transfer of Ps. fabioi to the genus Prosmittia allows to state that the female of Ps. fabioi (Boggero et al., 2014) is the first description of the female of the genus Prosmittia
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
No full textBruno Rossaro, 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. Zootaxa 7: 1-2
Orthocladius ruffoi Rossaro & Prato 1991
No full textOrthocladius ruffoi Rossaro & Prato, 1991 Orthocladius ruffoi Rossaro & Prato, 1991 Rheorthocladius sp. A Thienemann, 1944 (Rossaro & Prato 1991) Orthocladius Pe 1, Langton, 1984: 149 (Rossaro & Prato 1991) DESCRIPTION. See Thienemann (1944: 598), Langton & Cranston (1991, Fig. 1 e, 2 b, 4 a) and Rossaro & Prato (1991, Fig. 2, 3). Thoracic horn 250350 m long. Pedes spurii B absent. Tergites with median points always well separated from posterior ones on TIIVI, sometimes continuous laterally on T IIIV. T IIIII with lateral points well reduced in size with respect to median ones. Very long dorsal and ventral setae on segments VIIVIII. Abdominal segment VII with 3 and segment VIII with 5 strong lateral setae. Pedes spurii A present on S IVVI. Taeniate extensions of cuticle present on anal lobes, in addition anal lobes with a lateral fringe of thin, short setae. Anal macrosetae not hooked at tip, 275340 m long, anal lobes 300375 m long and 400480 m wide. COMMENTS. The pupal exuviae was described by Thienemann (1944, p. 598) and labelled Rheorthocladius sp. A, and by Langton (1984, p. 149) and labelled Orthocladius (s. str.) Pe 1. MATERIAL EXAMINED: ITALY: PIEMONTE: Acqualba stream, 7 / 7 / 1976, 2 Pex. LOMBARDIA: Lambro river, Asso; 27 / 12 / 1977,1 male pupa; a creek, tributary of Oglio river near Vezza, 5 / 8 / 1979, 1 Pex. EMILIA ROMAGNA: Po river, Caorso (PC), 19 / 5 / 1981, 1 Pex. MARCHE: Potenza river, Castel Raimondo, 8 / 4 / 1986, 1 Pex. LAZIO: Velino river, 11 / 3 / 1990, 1 Pex. ABRUZZO: Sangro river, PNA, st. 4 (Pescasseroli), (SS 84 Km 41), 21 / 5 / 1978, 1 Pex; PNA, st. 13 (Profluo, prato Piano), 21 / 5 / 1978, 1 Pex; PNA, st. 14 (Scontrone), 11 / 11 / 1988, 1 Pex; Vera spring, 12 / 3 / 1988, 1 Pex; 3 / 5 / 1989,1 Pex; 3 / 6 / 1989,1 Pex.Published as part of Bruno Rossaro & 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 on pages 13-14, DOI: 10.5281/zenodo.461844
Orthocladius ticinoi Rossaro & Prato 1991
No full textOrthocladius ticinoi Rossaro & Prato, 1991 O. ticinoi Rossaro & Prato, 1991 Orthocladius Pe 7 Langton, 1984: 155 (Langton 1991: 190 a tentative synonym) nec O. glabripennis Goetghebuer, 1921, sensu Rossaro 1991 DESCRIPTION. See Rossaro & 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 O. obumbratus. Thorax moderately rough. Pedes spurii B developed. On T II only posterior point field present. TIII with posterior points not extended laterally beyond apical points. Points on TIIIVI limited to a central trapezoidal area; there is a sudden drop in point size to anterolateral points. Posterior points on TIIIVI and apical points on TIIIV more developed than the anterior ones, onT IV VI anterior points more developed than the median ones. SIIIV with more or less extended fields of very small grouped points. Pedes spurii A present on S IVVII. Lateral setae: 1 on segment I, 3 on segments IIVI, 4 on segment VII and 5 on segment VIII. 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 O. obumbratus, in which well sclerotized extensions of cuticle at the tips of anal lobes, resembling spurs, are observed. Rossaro (1991) synonymized O. ticinoi with O. glabripennis (= Orthocladius Pe 5), because of the presence of small and colourless teeth (Langton & Cranston 1991), but apical taeniate extensions of cuticle apparently are always absent in O. glabripennis and there is no variation within the species in this respect, O. glabripennis is a lentic species, O. ticinoi is restricted to running waters besides this. The conclusion is that specimens with small colourless apical taeniate extensions of cuticle do not belong to O. glabripennis, but to O. ticinoi, which is a separated species. According to Langton (1991) description, O. ticinoi be identical with Orthocladius Pe 7 Langton 1984: 155. MATERIAL EXAMINED: FRANCE: GARONNE river, 10 / 3 / 1997, 1 Pex. ITALY: 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.Published as part of Bruno Rossaro & 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 on pages 14-15, DOI: 10.5281/zenodo.461844
Orthocladius (Symposiocladius) ruffoi Rossaro & Prato 1981
No full text<i>Orthocladius</i> (<i>Symposiocladius</i>) <i>ruffoi</i> Rossaro & Prato, 1981 <p> <i>Orthocladius ruffoi</i> Rossaro & Prato, 1981: 60.</p> <p> <b>Material examined.</b> 1♁ in isinglass now mounted on slide, labelled:‘ <i>Rheorthocladius</i> sp.A. 416 // Heusden 20.3. 16 M. Goetghebuer // Non-type, type locality Ploen (GERMANY), 1937 Humphries, P.S.Cranston, 1975 // R.I.SC.N.B. 18.073 / Coll. et det. M. Goetghebuer’.</p> <p> <b>Comments.</b> The genus <i>Rheorthocladius</i> was created by THIENEMANN (1935) to include species of <i>Orthocladius</i> on the basis of their metamorphic stages (pupal exuviae). This male is associated with pupal exuviae labelled as <i>Rheorthocladius</i> sp. A, deposited in the Zoologische Staatssammlung München (ZSM). The last antennal flagellomere is 1066 <b></b> m long, the total length of the remaining flagellomeres is 379 <b></b> m, AR = 2.81; Pm3 length 151 <b></b> m, Pm4 length 116 <b></b> m, length ratio Pm3/Pm4 = 1.30; dorsocentrals 13; tergite IX with 13 setae. Hypopygium as in <i>O.</i> (<i>S.</i>) <i>ruffoi</i> (see ROSSARO et al. 2003) with phallapodeme distinctly curved apically. A comparison with the holotype allows the assignment of the studied specimen to <i>O.</i> (<i>S.</i>) <i>ruffoi</i>, even though in the holotype of <i>O.</i> (<i>S.</i>) <i>ruffoi</i> the length ratio Pm3/Pm 4 is near to 1, instead of 1.30 (ROSSARO et al. 2003).</p>Published as part of <i>Magoga, Giulia, Montagna, Matteo, Marziali, Laura, Rossaro, Bruno & Disaa, 2017, Revision of type and non-type material assigned to the genus Orthocladius by Goetghebuer (1940 - 1950), deposited in the Royal Belgian Institute of Natural Sciences (Diptera: Chironomidae), pp. 723-749 in Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) (Acta. Ent. Mus. Natl. Pragae) 57 (2)</i> on pages 742-743, DOI: 10.1515/aemnp-2017-0097, <a href="http://zenodo.org/record/5318416">http://zenodo.org/record/5318416</a>
Description of some unknown larvae of Diamesa genus and correction to previous descriptions (Diptera, Chironomidae)
No full textMid-Po river zooplankton : a seven year study
No full textThe temporal crustacean-zooplankton variation in the mid-Po River (Italy) was analyzed from November 1974 through November 1982. Samples were collected at three stations at monthly intervals. Separate taxon-by-taxon multiple regression analyses (MLTRG) were carried out with zooplankton taxa as the criterion variable and river depth, river discharge and water temperature as the predictor variables. Moina brachiata and Eucyclops serrulatus were correlated with water temperature, Cyclops vicinus inversely correlated with temperature, Eudiaptomus padanus, C. vicinus and Daphniidae with river discharge; Copepodites inversely correlated with river depth. MLTRG showed that water temperature and river discharge account for about 15% of total zooplankton variation. Factorial analysis of variance (ANOVA) was carried out on residuals calculated from MLTRG. Among-years and among-months variation were significant for all the examined taxa. Significant years × months interactions indicated that seasonal variations were also different in different years. ANOVA stressed that there were still unexplained significant residuals in years and months variations. Weekly and daily samples collected in Summer 1979 were submitted to MLTRG and ANOVA as above. Among-week variations were significant for all the examined taxa, whereas among-days were significant for Daphiidae and M. brachiata (Cladocera), and not significant for any of the other taxa. Caution is recommended in interpreting the results of river zooplankton studies. Differences between species responses warn us not to pool species into larger taxa. Temporal variation changes from year to year, so long-time series are necessary to clarify the most important trends of river zooplankton
Stilocladius montanus n. gen. n. sp.: descrizione di un nuovo genere e di una nuova specie di Orthocladiinae dalle Alpi italiane (Diptera, Chironomidae)
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