SCHIZOPORELLOIDEA Jullien, 1883

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 : 2693-2695

Superfamily SCHIZOPORELLOIDEA Jullien, 1883

Family LACERNIDAE Jullien, 1888

Genus Phonicosia Jullien, 1888

Phonicosia jousseaumei Jullien, 1888

( Figure 10 A–C)

Phonicosia jousseaumei Jullien 1888, p 51 , Plate 1, Figure 6 .

Phonicosia circinata: Hayward 1991, p 330 , Figure 12 .

Material

St. 53 Marion Island (46 ° 55 9 S, 37 ° 33 9 E), 606–775 m, SAM A27573 .

Description

Colony forming small rounded patches, encrusting on rock. Autozooids oval to hexagonal, convex, separated by distinct sutures; 0.55–0.65X 0.35–0.4 mm. Primary orifice slightly wider than long, 0.1X 0.09 mm, sinus narrowly U-shaped 0.02 mm, parallel-sided, condyles short and broad, occupying entire proximal border of orifice on either side of the sinus. Six to eight oral spines spaced around lateral and distal margins of orifice, three pairs persisting in ovicelled autozooids. Frontal wall thinly calcified, glossy, hyaline, smooth; imperforate except for a single series of large, widely spaced marginal pores, with two to three adjacent to the sinus, on each side. Ovicell 0.3 mm long, slightly longer than wide; basal ring of ectooecium thickly calcified, with basal pores, entooecium smooth.

Remarks

Phonicosia jousseaumei , the type species of the genus, was originally described from the Magellan Strait ( Jullien 1888). Hayward (1991) re-examined Jullien’s holotype specimen, and considered that it represented the same species collected by Discoυery Inυestigations from the southern Patagonian shelf, Gough Island, the South Sandwich Islands, and Marion Island. However, following Powell (1967) and Gordon (1984, 1984), these records were attributed to the Indo-West Pacific species, P. circinata (MacGillivray) . Powell (1967) noted two ‘‘forms’’ of P. circinata in material from New Zealand, and Gordon (1984) recorded further morphological variation in specimens from the Kermadec Ridge. It is possible that the broad geographical range attributed to P. circinata is founded upon several different species; D. P. Gordon (in litt.) considers that, at least, P. jousseaumei is distinct from P. circinata and, on the basis of Hayward’s (1991) examination of Jullien’s holotype, the Marion Island species is here referred to the former.

Family MICROPORELLIDAE Hincks, 1879

Figures

Figure 6. (A, B) Filaguria lithocrustata sp. nov., SAM A27523: (A) ovicelled autozooid, X70; (B) autozooids and a small kenozooid, X40. (C–E) Sclerodomus myriozoides, SAM A27530: (C) part of colony plus young branch, X15; (D) abfrontal view of colony showing four series of autozoids, X30; (E) aperture showing associated avicularia.

Figure 10. (A–C) Phonicosia jousseaumei, SAM A27573: (A) autozooids and incomplete ovicell, X70; (B) ovicelled autozooid, X60; (C) detail of orifice and pores, X200. (D–G) Calloporina spinosa sp. nov., SAM A27564: (D) autozooid, X100; (E) autozooid, X100; (F) orifice, X160; (G) ascopore, X800.

Figure 12. Reteporellina berylae sp. nov., SAM A27527: (A) autozooids and ovicelled autozooids with small adventitious avicularia, X50; (B) part of the colony showing large irregular fenestrulae, X10; (C) small frontal avicularium, X125; (D) ovicell and aperture, X70; (E) large avicularium, X65.