Chelostoma ( Chelostoma ) transversum (Friese, 1897)

Müller, Andreas, Pisanty, Gideon & Dorchin, Achik, 2025, Western Palaearctic Chelostoma bees of the subgenus Chelostoma (Megachilidae, Osmiini): biology, taxonomy and key to species, Zootaxa 5717 (3), pp. 329-369 : 344-345

Chelostoma ( Chelostoma) transversum (Friese, 1897)

Eriades transversus Friese, 1897: 193 . Type material: Lectotype ♂, by designation of G. van der Zanden (unpublished), “ Graecia ” ( Greece), Museum für Naturkunde Berlin.

Literature records. GREECE: Central Greece: Parnass ( Ebmer 2009); Peloponnese: W Argyra, Oitylo N Areopoli, Paleopanagia ( Ebmer 2009, 2011); Western Greece: Ano Diakopto, Zachlorou ( Ebmer 2009).

New records. GREECE: Attica: Troizen , 100–500 m, 29.4.2000, 1♀, 1♂ (leg. W. Arens) ; Central Greece: Phokis Vardoussia Mts., N Perivoli , 38°33′03′′N / 22°06′13′′E, 1020 m, 6.6.2009, 1♀ (leg. H. Rausch) ; Peloponnese: Mani, Agios Dimitrios , 20 m, 29.4.2001, 6♀ (leg. A. Müller) ; Thessaly: Meteora , 26.5.1963, 1♀ (leg. W. Schläfle) ;

Western Greece: 3 km S Kato Zachlorou , 800 m, 23.5.2006, 4♀, 1♂ (leg. C. Praz, C. Sedivy) .

Distribution. Mainland Greece. C. transversum has not yet been reliably recorded outside mainland Greece.

Pollen hosts. Oligolectic on Dipsacoideae ( Sedivy et al. 2008; Ebmer 2009). Flower records: Knautia integrifolia , Scabiosa argentea ( Ebmer 2009) .

Nesting biology. Unknown.