Polymastia piscesae, Austin, William C., Ott, Bruce S., Reiswig, Henry M., Romagosa, Paula & G, Neil, 2014

Austin, William C., Ott, Bruce S., Reiswig, Henry M., Romagosa, Paula & G, Neil, 2014, Taxonomic review of Hadromerida (Porifera, Demospongiae) from British Columbia, Canada, and adjacent waters, with the description of nine new species, Zootaxa 3823 (1), pp. 1-84 : 18-22

Genus Polymastia Bowerbank, 1864

Comparison of North Pacific Polymastia . Table 3 provides comparisons of known north Pacific Polymastia with regard to their spicules, water depth and geographic ranges. The first four species were recorded from the NE Pacific (de Laubenfels 1936, Lambe 1895, this paper). The last seven species in the table occur in the NW Pacific ( Koltun 1959, 1962, 1966, 1970a, 1970b; Plotkin 2002; Tanita et al. 1989). The fistulae shape and size of multifistulate Polymastia from the north Pacific are compared in Table 4 , and the appearance of preserved multifistulate Polymastia from the NW Pacific is shown in Fig. 6 . All species known from the NE Pacific are multifistulate, therefore north Pacific species with only a single fistula ( P. hispidissima Koltun 1966 ) were excluded from further consideration.

Species Source Exhalant Larger Shape of Fistulae Mean Size of Than Inhalant Fistulae (LxW at Fistulae base) (mm) 1 Described specimens had only one fistula per sponge

? No data

Figures

FIGURE 6. Multifistulate Polymastia spp. in the NW Pacific. Numbers, form and size of fistulae. Scale bar, 3 cm on all but C where scale bar 5 cm. A, P. kurilensis Koltun; B, P. laganoides Burton; C, P. fluegeli Lehnert et al.; D, large P. toporoki Koltun; E, small P. toporoki; F, P. affinis Thiele, fistulae contracted; G, P. affinis, fistulae expanded. A, D – G from Koltun 1966; B from Lambe 1895, courtesy Royal Society of Canada; C from Stone et al. 2011.

Tables

TABLE 4. North Pacific Polymastia fistula comparison.

Polymastia piscesae n. sp. W.C. Austin	Yes	Pointed, conical	20 x 3.25
Polymastia pacifica W.C. Austin	Yes	Rounded apex, conical	4.5 x 2–7 x 2
Polymastia pachymastia W.C. Austin	Yes	Large, cylindrical	30 x 15
Polymastia kurilensis W.C. Austin	No	Button-like, conical	1 x 1.5
Polymastia laganoides Lambe	Not given	Wide, conical	?
Polymastia affinis Thiele	Not given	Small, papillose	1 x?