Neira, C.; Decraemer, W. (2009). Desmotersia levinae, a new genus and new species of free-living nematode from bathyal oxygen minimum zone sediments off Callao, Peru, with discussion on the classification of the genus Richtersia (Chromadorida: Selachinematidae). Organisms Diversity & Evolution. 9(1): 1.e1-1.e15.

151762

10.1016/j.ode.2008.09.004 [view]

Neira, C.; Decraemer, W.

2009

9(1): 1.e1-1.e15

Publication

NeMys doc_id: 17887

Available for editors   [request]

Desmotersialevinae gen. n.,sp.n.isproposed,basedonmaterialfoundinbathyaloxygenminimumzonesediments off thecoastofPeru. Desmotersia closely resembles Richtersia in theanimals’generalappearanceandinspiny ornamentationofthebodycuticle,butclearlydiffersinstomastructureandbythepresenceofadorsaltooth. The systematicpositionsofthetwogeneraarediscussed,since Desmotersia apparently forms a link between Selachinematidae and Desmodoridae. Desmotersia levinae is characterized by a variety of spiny ornamentations anteriorly formed by bipartite spines arranged into a fin-like picket fence,by a head with anasymmetrical cephalic capsule, presence of two closely spaced ventral longitudinal rows of copulatory thorns,and by 2–4 ventral thorns in mid-tail positions on the male. The interaction between the new species and its habitat is discussed.

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