Dolichosoma lineare ( Rossi, 1794 )

Liberti, Gianfranco, 2009, Improved Strategies for Branching on General Disjunctions, Zootaxa 2318, pp. 339-385 : 364

Dolichosoma lineare ( Rossi, 1794)

( Fig. 21 )

Lagria linearis Rossi, 1794: 92 (Loc. typ. Tuscany); Stephens 1830: 320; Redtenbacher 1858: 547; Kiesenwetter 1863: 642; Thomson 1864: 146; Kiesenwetter 1867a: 119; Kiesenwetter 1867b: 137; Mulsant & Rey 1868: 269, pl. XVI; Seidlitz 1891a: 489; Seidlitz 1891b: 522; Schilsky 1897b: nr. 26; Reitter 1911: 289; Pic 1918: 2; Pic 1924a: 57, 83; Porta 1929: 123; Pic 1937: 106; Horion 1953: 140; Kaszab 1955a: 118; Kaszab 1955b: 118, figs 40 F, 42; Allenspach & Wittmer 1979: 110; Lohse 1979: 80; Majer 1990: 97; Constantin & Klausnitzer 1996: 196; Sparacio 1997: 106; Bahillo de la Puebla & Lopez-Colon 2002: 145; Liberti & Focarile 2005: 29, 35; Mayor 2007b: 407.

= Tillus filiformis Panzer, 1799: 17 ( Illiger 1801: 84) .

= Dolichosoma filum Fairmaire, 1860: 630 ( Constantin 2007: 167) .

= Dolichosoma subdensatum Mulsant & Rey, 1868: 273 ( Schilsky 1897b: nr. 26)

= Dolichosoma submicaceum Mulsant & Rey, 1868: 274 ( Schilsky 1897b: nr. 26).

= Dolichosoma subnodosum Mulsant & Rey, 1868: 274 ( Schilsky 1897b: nr. 26).

Material examined. Sassari prov.: Nulvi, 1974 ( CFR); Osilo, 1974 ( CFR); Tula, 1995 ( CAN). Olbia-Tempio prov.: Padrogiano, 1995 ( CAN); Tempio Pausania, 1995 ( CAN). Nuoro prov.: Oliena, San Giovanni, 1995 ( CAN). Oristano prov.: Asuni, y-? ( MNHU); Sedilo, 1995 ( CAN); Soddi, 2003 ( CPA). Cagliari prov.: Stazione di Sarcidano, 1994 ( CME); Villanovatulo, 1994 ( CME).

Chorotype. Probably Sibero-European: from Finland to Spain and eastwards at least to central Siberia ( Mayor 2007b); in Italy it mainly occurs in the north and in the centre down to Latium (Liberti unpublished data). Affinities: the genus Dolichosoma is Euro-Asiatic.

Notes. Members of Dolichosoma are immediately recognizable by their surprisingly thin and long shape; D. lineare can be distinguished from the closely related D. simile by good and reliable characters (see key above). Dolichosoma species are associated with graminaceous weeds and can be collected by sweeping on dry meadows. Dolichosoma lineare was already reported for Sardinia by Costa (1883), Bertolini (1899 –1904) and Sainte-Claire Deville (1908: 217) under the name D. filum . Often common or very common elsewhere, it appears to be rather rare in Sardinia.

Figures

FIGURES 20–23. 20–21. Median lobes in lateral view, scale bar: 0.25 mm. 20. Dolichosoma simile (Brullé) (Italy, Tuscany, Grosseto province, Talamone). 21. Dolichosoma lineare (Rossi) (Sardinia, Padrogiano). 22–23. Pygidium, scale bar: 0.5 mm. 22. Psilothrix aureola (Kiesenwetter, 1859) (Malta, Gozo Island). 23. Psilothrix viridicoerulea (Italy, Liguria, La Spezia province, Montemarcello).