Polyandrocarpa rollandi Tokioka, 1961

Lambert, Gretchen, Lee, Serina Siew-Chen & Teo, Serena Lay-Ming, 2021, Ascidians collected during the 2013 Singapore Strait International Marine Biodiversity Workshop, Zootaxa 4933 (1), pp. 1-38 : 22

Polyandrocarpa rollandi Tokioka, 1961 NEW RECORD

Figure 8E, F ; Figure 9 A–C

#2655A, colony 7.5 cm across. Tunic pale reddish, almost completely covered with fine whitish sediment. Zooids embedded in common tunic, only the separate siphons emergent. Small tubercles around edge of siphons. In the living colony the siphon lining has red striping. A large zooid out of tunic 3 cm long with wide gut loop, many narrow plications on stomach, no caecum. Rectum very long, anus with 14 rounded lobes but also bilobed. Gonads six on left, 34 on right, very loosely attached to body wall, elongate and sausage shaped. No endocarps in gut loop or body wall. With small Pyura curvigona Tokioka, 1950 (#2655B) embedded in colony (see Fig. 11E ).

Distribution: New Caledonia, Majuro, Australia, Hawaii.

Detailed references with illustrations: Kott (1985 as P. sagamiensis ), Monniot C. (1987b), Abbott et al. (1997 as P. sagamiensis ). Additional reference: Nishikawa (1984).

Figures

FIGURE 8. A–D: Monandrocarpa monotestis. A: whole colony 3.5 cm in length; B: enlargement of four zooids; C: gut, intestine and a few left side gonads; D: curved caecum at posterior end of gut. E, F: Polyandrocarpa rollandi. E: part of colony, scale bar 8 mm; F: oral siphon showing reddish striping.

FIGURE 9. A–C: Polyandrocarpa rollandi. A: right side body, 3 cm in length, removed from tunic; B: same specimen, left side body; C: lobed anus. D: Polycarpa aurita 3.6 cm in height, left side; E, F: Polycarpa captiosa right side. E: in tunic, 6 cm in length; F: removed from tunic.

FIGURE 11. A, B: Microcosmus exasperatus. A: whole animal right side, 1.2 cm in height; B: siphonal spines, largest 44 um long; C: Microcosmus helleri in tunic, 2 cm in width, showing opened edges of embedded bivalve (arrow); D: bivalve removed from host tunic; E: anterior end of small Pyura curvigona (2 cm total length) partially embedded in Polyandrocarpa rollandi colony; F: P. curvigona siphonal spines, longest 211 µm.