Paraxenylla Murphy, 1965

Palacios-Vargas, José G. & Janssens, Frans, 2006, Two new American species of Paraxenylla (Collembola: Hypogastruridae) and ecological notes, Zootaxa 1312, pp. 37-47 : 38-39

Paraxenylla Murphy, 1965

Syn. Haloxenylla Gama & Deharveng, 1984:131 Diagnosis of the genus

Habitus of Xenylla . Body length 0.36–1.50 mm, with blue pigment, PAO absent, with 5 + 5 eyes. Mouthparts modified with tendency to a type for chewing. Labral setae 7/ 5, 5, 4. Antennae of Xenylla type, but sensorial organ of antennal segment III with five similar elements, ventral guard setae between the sensorial rods. Antennal segment IV with four thick sensilla, one microsensillum, one subapical organ and a simple apical bulb. Tenent hairs capitate or acuminate. Unguis without empodium, with or without a median teeth. Furcula well developed, mucro completely or partially separate from dens. Tenaculum with 2, 3 or 4 teeth on each ramus. Anus terminal and abdominal segment VI as a truncate cone. Anal spines absent.

Chaetotaxy of Type I, with mesosetae and macrosetae. Dorsally on thoracic segments II and III with m2 (absent in Xenylla ) as a macroseta. On abdominal segments I–IV, p2 is a macroseta; on abdominal V a1 is a macroseta and ss at p4. Ventral chaetotaxy of the head and abdominal segments I–III reduced. Ventral tube with 1, 2, 3 or 4 setae per side.

The following species, originally described under the genus Xenylla , probably belong to Paraxenylla and need revision: littoralis Womersley, 1933, longicauda Folsom, 1898 and occidentalis Womersley, 1933.

Type species Xenylla (Paraxenylla) mangle Murphy, 1965