Prognathorhynchus dubius Meixner, 1929

Willems, Wim R., Sandberg, Maria I. & Jondelius, Ulf, 2007, First report on Rhabdocoela (Rhabditophora) from deep parts of Skagerrak, with the description of four new species, Zootaxa 1616, pp. 1-21 : 15

Prognathorhynchus dubius Meixner, 1929

( Fig. 6 A–B)

Locality. Loc. 7.

Known distribution. Northern Atlantic, Germany ( Noldt 1989b).

Material. One individual studied alive.

Remarks. Unfortunately, no material of this species could be preserved. However, observations on a single live individual (see Fig. 6 A) allowed a positive identification, mainly based on the structure of the proboscis teeth ( Fig. 6 B) and the stylet (see Ax 1952).

A Μm

10

Figures

FIGURE 6. Prognathorhynchus dubius A, general organisation (from a live individual). B, proboscis hook (from live individual; freehand drawing). Proxenetes segmentatus. C, bursal appendage (from a whole-mount). D, stylet (from a whole-mount). Utelga heinckei E – F, stylet hooks of two different individuals (from whole mounts).