Taliijittaticella frigida, (Waters, 1904)

Branch, M. L. & Hayward, P. J., 2005, New species of cheilostomatous Bryozoa from subantarctic Marion and Prince Edward Islands, Journal of Natural History 39 (29), pp. 2671-2704 : 2684-2686

TaliIJittaticella frigida ( Waters, 1904)

( Figure 7A )

Catenicella frigida Waters 1904, p 20 , Plate 1, Figure 1 a–d.

Taliυittaticella frigida: López Gappa and Lichtschein 1990, p 23 , Plate 7, Figures 4 , 5 , Plate 11; Hayward 1995, p 237, Figure 151A–C.

Material

St. 49 Marion Island (47 ° 00 9 S, 37 ° 54 9 E), 265–306 m, good colony, SAM A27058 ; St. 16 Marion Island (46 ° 51 9 S, 38 ° 04 9 E), 160–170 m, small fragment, SAM A27060 ; St. 29 Marion Island (46 ° 41 9 S, 37 ° 57 9 E), 145 m, small damaged, SAM A27551 ; St. 35 Marion Island (46 ° 45 9 S, 37 ° 48 9 E), 204 m, small fragment, SAM A27059 ; St. 38 Marion Island (46 ° 58 9 S, 37 ° 59 9 E), 200 m, old base, SAM A27055 ; St. 43 Marion Island (47 ° 40 9 S, 37 ° 51 9 E), 350–600 m, small fragment, SAM A27056 .

Description

Colony erect, branching, jointed, up to 10 mm high, attached by chitinous rhizoids. Singlezooid internodes 0.77–0.84 mmX 0.32 mm, lightly calcified; orifice D-shaped, as long as wide, 0.1 mm; costate frontal shield slightly larger than the orifice, comprising five fused costae with five conspicuous infra-costal pores, the distalmost pair, bordering the aperture, about three times as wide as the rest. Proximo-lateral pore chambers (vittae) extending along the proximal half of the zooid, elongate oval and shallow with a few small median pores. Two smaller chambers lateral to the orifice and shield, and a further pair of small chambers distal to the orifice. A pair of small avicularia at disto-lateral corners of autozooid, single at dichotomy; rostrum 0.04 mm long. No brooding zooids present. In older parts of the colony rhizoids partly cover and obscure the zooids.

Remarks

This is only the third record of T. frigida , and represents a considerable extension of its geographical range. It was described from a single station in the Bellingshausen Sea, at 580 m ( Waters 1904), and recorded, and figured, by López Gappa and Lichtschein (1990) from a single locality on the southern Patagonian shelf, at 145 m. Taliυittaticella was introduced ( Gordon and d’Hondt 1985) for three species with deep-sea distributions. Taliυittaticella frigida is unique in the genus, but similar to other Catenicellidae , in evidently ranging into far shallower water.

Figures

Figure 1. Map of Prince Edward and Marion Islands, showing University of Cape Town survey sampling stations.

Figure 4. (A) Cornucopina antlera sp. nov., SAM A27531, part of the colony showing autozooids and frontal avicularia, X40; (B) Cornucopina elongata sp. nov., SAM A27548, part of the colony showing autozooids, ovicelled autozooid and long avicularium, X40; (C) Cornucopina bryonyae sp. nov., SAM A27547, part of the colony showing autozooids, ovicelled autozooid and three types of avicularia, X40.

Figure 5. Paracellaria elizabethae sp. nov., SAM A27537: (A) autozooids and large avicularia, X80; (B) autozooid with, distally, the aperture of an endotoichal ovicell, X120; (C) avicularium, X280; (D) colony, X3.

Figure 7. (A) Taliυittaticella frigida, SAM A27058, autozooid, X110. (B–E) Catenicella glabrosa sp. nov., SAM A27556: (B) autozooid and ovicelled autozooid, X80; (C) autozooid, X100; (D) portion of colony showing internodes, X40; (E) detail of avicularium, X300.