Rogneda falcata, BRUNET, 1965

Artois, Tom J., 2008, Revision of Rogneda Uljanin, 1870 (Rhabditophora, Eukalyptorhynchia, Polycystididae) with the description of seven new species, Zoological Journal of the Linnean Society 153 (1), pp. 1-28 : 5

publication ID

https://doi.org/ 10.1111/j.1096-3642.2008.00384.x

persistent identifier

https://treatment.plazi.org/id/166C0B45-FF9E-FFF8-FC09-F8615022FDCC

treatment provided by

Felipe

scientific name

Rogneda falcata
status

 

THE FALCATA View in CoL -GROUP

The falcata -group includes two unpigmented species from the western Mediterranean: R. acuta ( Figs 3D View Figure 3 , 4E, F View Figure 4 ) and R. falcata ( Figs 3C View Figure 3 , 4G View Figure 4 ). These species differ from the other species of Rogneda by the fact that stylet A consists of only one plate, and by a particular construction of stylet B. According to Brunet (1979), stylet A of R. acuta can easily be derived from that of R. falcata ‘by a simple regression’ of the proximal part of the stylet. Although such a process could be imagined, it is highly speculative. Actually, stylet A of R. acuta cannot be compared with that of any of the other species of Rogneda , while stylet A of R. falcata resembles stylet B of R. reticulata ( Fig. 8E View Figure 8 ), but with the distal part of plate B1 lacking in R. falcata . Stylet B of the species of the falcata -group differs from that of all other species of Rogneda (except the species of the capulata -group) in that plate B2 is attached to the proximal end of plate B1. In R. falcata , plate B1 is sickle-shaped and plate B2 is digitiform. In R. acuta , stylet B is more of the typical form, with plate B2 being plate-shaped and distally forked.

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