Polycarpa captiosa ( Sluiter, 1885 )

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 : 22-25

Polycarpa captiosa ( Sluiter, 1885)

Figure 9E, F ; Figure 10A

Tunic usually a lumpy white. Siphons with brown or blackish and white stripes, thin red line around the edge of the siphons out of the tunic. Siphons and body wall after preservation in formalin mostly dark brown. Atrial siphon in posterior third of specimens. Dorsal ganglion makes prominent yellow bump on body wall midway between siphons. Prepharyngeal groove narrow, long; dorsal tubercle also long and narrow with several openings mostly in anteroposterior direction. Many endocarps scattered over the body wall, several long paddle-like ones in the gut loop, and long ones projecting into the atrial opening as described by Monniot F. & Monniot C. (1996). Entire body wall with dense horizontal musculature as drawn by Tokioka (1950) for P. papillata Sluiter, 1885 . Stomach long, many grooves; anus with many short rounded lobes.

#0167, several large individuals, fouling; #0170, fouling.

#1210, length 6 cm in tunic, 5.4 cm out of tunic. Gonads elongate, attached at proximal end, eight on left side, 16 on right.

#1224, about 4 cm long out of tunic to tip of oral siphon. A couple red patches at posterior end of body wall on right side. Oral tentacles few and brown with space between each. Branchial sac missing the posterior part. Gonads small but elongate, six on the right side, none on the left; probably immature. A few oocytes, testes irregularly lobed as in Tokioka (1950).

# 2582, specimen 3.3 cm long in tunic, 2.5 cm long out of tunic. Digestive organs eviscerated along with the posterior part of the left branchial sac.

#2641B, two large specimens; branchial sac and gut loop are eviscerated.

#3875, juvenile 2.5 cm long to siphon tip x 1.4 cm wide. No gonads.

Distribution: Indonesia, Malaysia, Philippines, Singapore, Palau, Marianas Is., Australia.

References with detailed descriptions and illustrations: Tokioka (1950), Millar (1975), Monniot F. & Monniot C. (1996, 2001, 2008); Lee et al. (2013). Other references: Kott (1985, erroneously synonymized under P. papillata ; see Monniot F. & Monniot C. 2001), Lee et al. (2016).

Figures

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 10. A: Polycarpa captiosa dorsal ganglion; B, C: Polycarpa cf. olitoria. B: right side in tunic, 5 cm in length; C: left side removed from tunic showing row of gonads. D: Polycarpa papillata right side, 7 cm in length; E: Styela canopus siphonal scales 15 µm in length; F, G: Symplegma brakenhielmi. F: live colony; G: single preserved zooid from same colony, 3 mm in length.