Molgula hodgsoni Herdman 1910

• Main Authors: Monniot, Françoise, Dettai, Agnès
• Format: Other/Unknown Material
• Language: unknown
• Published: 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Chordata; Ascidiacea; Pleurogona; Molgulidae; Molgula; Molgula hodgsoni; Antarctic; Antarctic Peninsula; Ross Sea; Bransfield Strait; Wilkes Land; South Orkney Islands; Terre Adélie; Terre-Adélie; Herdman; Linde; Antarc*
• Online Access: https://zenodo.org/record/6097442; https://doi.org/10.5281/zenodo.6097442

Molgula hodgsoni Herdman, 1910 Molgula hodgsoni Herdman, 1910: 11 –12 pl. 3,figs 7–13. Hartmeyer 1909 – 11. Monniot & Monniot: 1983 and synonymy; 1994: 34. Tatián et al. 2005: 211. Primo & Vázquez: 2007: 1805. Molgula angulata Ärnbäck-Christie-Linde: 1938. Material: Terre Adélie: 66 ° 563322 S– 141 ° 255738 E, 360 – 151 m; 66 °001305 S– 142 °0143 E, 240 m; 66 °003882 S– 143 ° 7160085 E, 430 m; 66 ° 516823 S– 140 °001423 E, 175–262 m; 66 ° 38878 S– 140 ° 428852 E, 791 – 684 m; 66 ° 0 0 3882 S– 142 ° 313777 E, 233 m; 66 ° 40072 S– 139 ° 49647 E, 129 m; 66 ° 661100 S– 140 °081 E, 140 m; 66 ° 6060281 S– 140 ° 0 85 E, 140 m; 66 ° 6039662 S– 139 ° 982 E, 140 m. Antarctic Peninsula, South Orkney Islands,Wilkes Land, Ross Sea: numerous specimens from 50 to 500 m (for stations see Monniot & Monniot: 1983) Bransfield Strait: 62 ° 26.66 S – 56 ° 17.35 W, 438 m, 27 /01/ 2013 “Polarstern” exp. 81. Oval or triangular in outline, the body is 2.5 to 4cm long, coated with dense filaments holding to the sediment (Fig. 17 A). There is no peduncle. The not protruding siphons are located at the anterior corners of the body. The tunic is resistant but thin. Removed from the tunic, the rim of the siphon is thinly dentate. The body wall is thin (Figs 16 B,C; 18 A) with crossed muscular ribbons interrupted over the gut and the right gonad in the middle of each body side. In addition, 8 to 10 parallel strong fibres issued from the atrial siphon extend on both sides until the gonads level without ramification; they make an obvious particular fan-shaped design (Fig. 18 A). There are 8 large tentacles of unequal size alternating with smaller ones; the most ventral is often the longest. A velum is present in both siphons. The dorsal tubercle is located in a large V of the peri-pharyngeal band; it is C-shaped and opens to the left or more or less posteriorly, its horns curved but not rolled (Fig. 17 A). The branchial tissue is thin, with 7 folds on each side (Fig. 18 B). The dorsal lamina is high, smooth edged, prolonged farther ...