Deviata
Family Oxytrichidae Ehrenberg, 1838 (ref. ID; 7423)
- Deviata abbrevescens Eigner, 1995 (ref. ID; 7423)
Remarks
Supposed ancestor of the Oxytrichidae, indicated by an incomplete early neokinetal 3 anlagen development in row six and long primary primordia indicated by the conspicuous processes in the cirral rows 4-6. Opisthe's anlage 3 develops from oral primordium and posterior cirri of the parental row four. Proter's analge 4 starts the streak development in the old row four. This development deviates later of the old row five. Opisthe's anlage 4 is generated within the old row five. Proter's anlage 5 develops within the old row six. Likewise within row six an anlage similar to a neokinetal 3 anlagen development generates the beginning of the anlagen development for opisthe's new row five. Also generated within the old row six is the new row six for proter and opisthe. The developments in the posterior anlage of row 6 (i.e. the primitive neokinetal process for developing proter's anlage 6 and the deviating streak for opisthe's anlage 5) have great similarity to the N3 development for instance in Pseudouroleptus caudatus. The anterior segment of the amphisiellid median cirral row is indicated by the anterior six cirri of row six in D. abbrevescens, which is similar to the anterior segment of row six in P. caudatus. Both early oxytrichids have three long cirral rows on right ventral side extending to the posterior end of the body. Therefore, the posteriormost cirri of these rows can be considered homologous to the transverse cirri of other oxytrichids. (ref. ID; 7423)