Polyclinum constellatum? Savigny 1816

• Main Author: Monniot, Françoise
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Enterogona; Polyclinidae; Polyclinum; Polyclinum constellatum?; Françoise; Antarc*; Antarctique*
• Online Access: https://dx.doi.org/10.5281/zenodo.6068867; https://zenodo.org/record/6068867

Polyclinum constellatum ? Savigny, 1816 Figure 2. Stations. CP 4309; CP 4408. Entirely covered with sand the small colonies (5 to 7mm in diameter) contain a single system of zooids around a central common cloacal opening. The oral siphon has 6 long pointed lobes (Fig. 2 B). The atrial siphon opens by a short narrow tube (Fig. 2 B) extended dorsally into a languet having longitudinal and transverse muscular fibres. Below the atrial siphon the body wall wears a button-like protrusion. The branchial sac has 11 to 12 stigmatal rows (Fig. 2 A). On the right side an average of 22 stigmata per row was counted and 12 round papillae on the transverse vessel between 2 rows. The dorsal languets are long and pointed. The abdomen has the common shape of the genus as does the post-abdomen which is appended by a thin peduncle (Fig. 2 B) The larva 0.55mm in length has a tail in a half circle, 3 adhesive papillae, 4 pairs of thick ampullae, and small vesicles on the ventral and dorsal sides (Fig. 2 C). A crystal is present in the central mass of the body. The colonies from Guiana only differ from the widely distributed P. constellatum by their small size. The species is cosmopolitan and has been recorded from a large area of the western Atlantic from Florida to Brazil (Monniot F. 1983; Rocha & Costa 2005). : Published as part of Monniot, Françoise, 2016, Ascidians (Tunicata) of the French Guiana Expedition, pp. 201-245 in Zootaxa 4114 (3) on pages 204-205, DOI: 10.11646/zootaxa.4114.3.1, http://zenodo.org/record/257053 : {"references": ["Savigny, J. C. (1816) Memoires sur les animaux sans vertebres. Chez Deterville, Paris, 238 pp. [pp. 2 - 239] http: // dx. doi. org / 10.5962 / bhl. title. 65971", "Monniot, C. & Monniot, F. (1983) Ascidies antarctiques et subantarctiques: morphologie et biogeographie. Memoires du Museum National d'Histoire Naturelle, Series A, Zoologie, 125, 5 - 168.", "Rocha, R. M. & Costa, L. V. G. (2005) Ascidians (Urochordata: Ascidiacea) from Arraial do Cabo, Rio de Janeiro, Brazil. Iheringia, Serie Zoologica, Porto Alegre, 95 (1), 57 - 64. http: // dx. doi. org / 10.1590 / s 0073 - 47212005000100009"]}