Strenzketoma, Potapov & Babenko & Fjellberg, 2006

Potapov, Mikhail, Babenko, Anatoly & Fjellberg, Arne, 2006, Taxonomy of the Proisotoma complex. Redefinition of genera and description of new species of Scutisotoma and Weberacantha (Collembola, Isotomidae), Zootaxa 1382 (1), pp. 1-74 : 63

Strenzketoma gen. n.

Type species: Proisotoma buddenbrocki Strenzke

Diagnosis. Anurophorinae with all abdominal segments clearly separated and a complete furca. Manubrium with a pair of distal chaetae on anterior side. Tergal sensilla decreased in number and set in the p-row. Buccal cone modified. Tibiotarsi with B-row complete, Crow reduced.

Integument with areas of weak secondary granulation, the network of primary granules visible. Ocelli 8+8, PAO present. Antennae with a normal set of sensilla and microsensilla, but bms on Ant.3 absent. Maxillary palp simple, with reduced number of sublobal hairs. Labral chaetotaxy as 1/554. Labial papilla E with guards e 4 and e 7 absent. Maxilla modified with elongated lamellae. Chaetal cover oligochaetotic, macrochaetae undifferentiated. Sensillar formula 30/02224 (s), microsensilla as 10/001. Unguis simple, tibiotarsal tenent chaetae not differentiated. T-chaetae on tibiotarsi absent. Thorax without ventral chaetae. Ventral tube with 4+4 laterodistal and more than 2 posterior chaetae. Furca complete, mucro with two teeth and clear lamellae.

Discussion. This monotypic genus is characterised by the loss of all sensilla on Th.III and Abd.I, a condition which is never observed in related forms. Also the mouth parts are exceptionally modified (1 sublobal hair, 1 prelabral chaeta, low labial papilla A and C, slender maxillary head) and the reduction of tibiotarsal chaetotaxy is unique.

Derivation of the name: The genus is named after K. Strenzke who originally described the type species from Kieler Bucht , Germany .