A revision of Tachyphron Brown and description of two new genera within the Ariphron group (Hymenoptera: Tiphiidae) Author Brown, G. R. text Journal of Natural History 2005 2010-12-06 39 2 197 239 http://dx.doi.org/10.1080/0022290310001657892 journal article 10.1080/0022290310001657892 1464-5262 5214577 Deuterothynnus gen. nov. Type species: Deuterothynnus fulvisetatus sp. n. Etymology. The generic name is derived from the Greek word deuteros meaning second, and is a reference to both a second large apical spine on the hypopygium and a secondary smaller preapical spine. Diagnosis. Male: hypopygium deeply emarginate medially between two long spines, and a smaller preapical spine on the outer margin of these long spines. Description. Male: similar to Tachyphron , but differs by having the hypopygium deeply emarginate medially between two long spines, a smaller preapical spine on the outer margin of these long spines ( Figures 13–16 ) and the genitalia ( Figures 5–12 ) with (1) the basiparameres long and (collectively) narrowly triangular or narrowly subparallel with the lateral margins straight over most of their length; (2) parameres (viewed laterally) usually broad over most of their length; and (3) the aedeagus differentiated into a small basal hoodlike structure without ventral lobes and apically into a long and often convoluted filament. Remarks. Four species, D. fulvicentratus , D. fulvisetatus , D. insularis and D. parallelus , from New Guinea (including Irian Jaya) or the adjacent island of Misool are known ( Figure 59 ). All are recorded from a single locality and from at most two specimens . The only known female specimen, the holotype of Deuterothynnus insularis (Turner) comb. nov. , apparently has been lost, and the original description is insufficient to provide a diagnosis. Key to males of Deuterothynnus (only the female of D. insularis is known but the holotype could not be located) 1. – Metasomal segments 1 and 2 orange, remainder of metasoma black Metasoma concolorous, dark brown to black............... 2 3 2. – Genitalia with basiparameres (collectively) with lateral margins subparallel (Figure 12) and parameres with dorsal margin gently curved over most of length ( Figure 11 ); setae white............... fulvicentratus sp. n. Genitalia with basiparameres (collectively) with lateral margins subtriangular ( Figure 10 ) and parameres with dorsal margin sinusoidal on basal half ( Figure 9 ); setae orange................ fulvisetatus sp. n. 3. Propodeum shallowly punctate; genitalia with basiparameres (collectively) with – Figures 13–16. Deuterothynnus spp. , male hypopygia. (13) D. fulvicentratus . (14) D. fulvisetatus . (15) D. parallelus . (16) D. insularis . Scale bar: 0.25 mm. lateral margins subtriangular ( Figure 8 ) and parameres with ventral margin straight with apex straight and narrow ( Figure 7 )........ insularis Turner Propodeum closely to rugosely punctate; genitalia with basiparameres (collectively) with lateral margins subparallel ( Figure 6 ) and parameres with ventral margin curved with apex curved and broad ( Figure 5 )....... parallelus sp. n.