Pseudoscalibregma bransfieldium ( Hartman, 1967 )

Blake, James A., 2015, New species of Scalibregmatidae (Annelida, Polychaeta) from the East Antarctic Peninsula including a description of the ecology and post-larval development of species of Scalibregma and Oligob, Zootaxa 4033 (1), pp. 57-93: 79

publication ID

http://dx.doi.org/10.11646/zootaxa.4033.1.3

publication LSID

lsid:zoobank.org:pub:9C0A63B6-5532-484D-BBD7-EDD5250D4ABA

persistent identifier

http://treatment.plazi.org/id/038D87CD-FFA0-BC03-FF16-FF52FCF4FB11

treatment provided by

Plazi

scientific name

Pseudoscalibregma bransfieldium ( Hartman, 1967 )
status

 

Pseudoscalibregma bransfieldium ( Hartman, 1967) 

Figure 6View FIGURE 6 F‒ G

Eusclerocheilus bransfieldia Hartman, 1967: 130  ‒131, pl. 39

Hyboscolex bransfieldia: Kudenov & Blake, 1978: 440  .

Pseudoscalibregma bransfieldia: Hartman, 1978: 180  ‒181, fig. 28

Pseudoscalibregma bransfieldium: Blake, 1981: 1143  ‒1145, fig. 6; Hartmann-Schröder & Rosenfeldt, 1991: 75.

Material examined. East Antarctic Peninsula, RVIB Nathaniel B. Palmer Cruise 2000 -03, Collector, J.A. Blake. —Larsen-A Ice Shelf Area, transect along border with Larsen B, Sta. NBP- 10, 332 m, 1 specimen ( LACM- AHFAbout AHF Poly 7010).

Additions to description. Single specimen complete, 10 mm long, 3 mm wide with 22 setigers; the body more maggot-shaped than arenicoliform. In alcohol, color light tan with no body pigment.

Prostomium bears two long frontal horns projecting anterolateral; dorsal surface of prostomium somewhat domed or elevated, clearly visible; eyes absent; nuchal organs not apparent. Peristomium a single dorsal ring surrounding the prostomium dorsally; ventrally forming upper and lower lips of mouth with upper lip relatively smooth and lower lip with three weakly developed lobes. A weakly developed ventral groove apparent along body from setiger 4; initially, groove formed by a single large segmental annulus that at the mid-point produces a notch between segments; in last 5‒6 segments, a distinct furrow develops at segmental mid-point. The pygidium damaged, but bears five anal cirri.

Anterior parapodia weakly developed with low noto- and neuropodia; posteriorly podial lobes elongate, apically pointed, bearing distinctive dorsal and ventral cirri ( Fig. 6View FIGURE 6 G), both of which are bulbous extensions of the podial lobes; internal glands absent from cirri and elsewhere on body. Interramal papillae weakly developed.

Setae consist of numerous capillaries arranged in 2‒3 rows throughout; lyrate setae from setiger 2; setiger 1 bears an anterior row of short, thin, spinous setae ( Fig. 6View FIGURE 6 F) anterior to capillaries, the homologues of lyrate setae now known to occur on numerous species of Scalibregmatidae  .

Remarks. Pseudoscalibregma bransfieldium  differs from other scalibregmatids by the distinctive dorsal and ventral inflated extensions of the podial lobes. The short anterior spinous setae of setiger 1 are newly reported.

Distribution. Widespread in Antarctic seas 332‒ 916 m.

AHF

Allan Hancock Foundation, University of Southern California

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Scalibregmatidae

Genus

Pseudoscalibregma

Loc

Pseudoscalibregma bransfieldium ( Hartman, 1967 )

Blake, James A. 2015

2015
Loc

Pseudoscalibregma bransfieldium:

Hartmann-Schroder 1991: 75Blake 1981: 1143

1991
Loc

Eusclerocheilus bransfieldia

Hartman 1967: 130

Loc

Hyboscolex bransfieldia:

Kudenov 1978: 440

Loc

Pseudoscalibregma bransfieldia:

Hartman 1978: 180