Proceraea bifidentata Ben­Eliahu, 1977

Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., Zootaxa 680, pp. 1-314: 45-46

publication ID

10.5281/zenodo.157809

publication LSID

lsid:zoobank.org:pub:471A4E52-4C92-44F8-AB38-CD03071C0067

persistent identifier

http://treatment.plazi.org/id/03CDB626-CC5B-4E0D-FEE8-7BD58976858D

treatment provided by

Plazi

scientific name

Proceraea bifidentata Ben­Eliahu, 1977
status

 

Proceraea bifidentata Ben­Eliahu, 1977  (Fig. 7 A –D)

Procera bifidentata Ben­Eliahu, 1977: 87  –88, fig. 14 A –C.

Material examined. Israel: holotype BMNH 1997.1076, Gulf of Elat, Dendropoma  habitat, 30 Apr 1971.

Diagnosis. Proceraea  with 9 large teeth alternating with 18 smaller in 2 rings, small teeth fused for half their length.

Description. Holotype mounted on slide, length 7.2 mm for 60–70 chaetigers, width 0.7 mm, but specimen compressed. Preserved material without colour markings. Ciliation not possible to assess.

Eyes confluent (Fig. 7 A); eye spots present. Palps in dorsal view projecting 1 / 3 of prostomial length, fused. Nuchal epaulettes not possible to observe.

All antennae and tentacular cirri lost, first left dorsal cirri present, damaged. Dorsal cirri equal in length, 1 / 6 – 1 / 8 of body width. Absence/presence of cirrophores on tentacular cirri, and first dorsal cirri not possible to determine; cirrophores on dorsal cirri that are possible to inspect, absent (Fig. 7 B). All appendages cylindrical.

Parapodial lobes rounded, small (Fig. 7 B). Anterior chaetigers with 2 aciculae, 1 in median and posterior. Chaetal fascicle with 7–10 compounds. Chaetal blades with small distal tooth (Fig. 7 C); serration present. Single thick bayonet chaetae (Fig. 7 C), beginning at chaetiger 8.

Pharynx sinuated, lying outside body; position of trepan not known. Trepan with 27 teeth; 9 large and 18 smaller; 1 large alternating with 2 small, arranged in 2 rings (Fig. 7 D); small teeth are fused for 1 / 2 their length. Basal ring present; infradental spines absent (Fig. 7 D). Number of rows of muscle cells not possible to assess. Anal cirri lost.

Additional information. Ben­Eliahu described the nuchal epaulettes as covering the tentacular segment, and the proventricle as equal in length to 3 segments in chaetiger 6–8, with 50 rows of muscle cells.

Reproduction. Unknown.

Habitat. Dendropoma  infauna.

Distribution. Indian Ocean, Gulf of Elat, only known from type specimen.

Remarks. Proceraea bifidentata  is unique among Proceraea  to have a trepan with 9 large and 18 smaller teeth. The trepan is very similar to the trepan found in Epigamia noroi Imajima & Hartman, 1964  ; P. bifidentata  differs from E. noroi  in e.g. the shape of bayonet chaetae.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Syllidae

Genus

Proceraea

Loc

Proceraea bifidentata Ben­Eliahu, 1977

Nygren, Arne 2004

2004
Loc

Procera bifidentata Ben­Eliahu, 1977 : 87

Ben-Eliahu 1977: 87