A review of the genus Tripylina Brzeski, 1963 (Nematoda: Triplonchida), with descriptions of five new species from New Zealand

摘要

Tripylina contains six accepted species. Morphologically, five new species can be briefly characterized as follows: T. tearoha sp. nov., T. manurewa sp. nov. and T. tamaki sp. nov. each have a single ventromedian seta and two pairs of lateral setae inthe cervical region; T tearoha sp. nov. differs from T. tamaki sp. nov. by de Man's Index a (25-30 vs 20-23), and differs from T. manurewa sp. nov. by the distance of the ventromedian cervical seta from the head end (62-77 vs 78-86 um). T. manurewa sp.nov. differs from T. tamaki sp. nov. by de Man's Index a (24-29 vs 20-23). Molecularly, these three new species can be differentiated by SSU & LSU analysis. Tripylina yeatesi sp. nov. and T kaikoura sp. nov. are characterised by relatively long bodies, and the absence of ventromedian cervical setae; Tripylina yeatesi sp. nov. differs from T. kaikoura sp. nov. by de Man's Indices: a (29-30 vs 22-23), b (5.8-6.0 vs 6.0-6.2), c (18-26 vs 14-16) and c' (2.0-2.6 vs 2.7-3.0), respectively. Among the six previously described species, the main distinguishing features for T arenicola and T. ursulae are their subventral stoma denticles lying posterior to the dorsal tooth, which differentiates them from T. longa, T macroseta, T. sheri and T stramenti. All published species also can be differentiated by: body length; values of De Man's Indices a, b, c, c' and V; presence or absence of setae and setal positions. A key is provided for all eleven species of the genus.