AnimaliaNot EvaluatedacceptedspeciesAccepted

Microcosmus helleri
Herdman, 1881
GBIF:179906384
0year

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Descriptions(1)
Figure 11 C, D Tunic lumpy, tough, tan to light brown in color, usually heavily fouled. Siphons widely separated and directed away from each other; no siphonal spines. Four large oral flaps at base of branchial siphon, six tall branchial folds per side. Liver composed of parallel lamellae with surface papillae. # 1172, attached to Cnemidocarpa irene (specimen # 1192). Small; 15 mm tall x 15 mm in width. Gonad in two sections on both sides, crosses gut on left side. # 4654, small, 2 cm in width; body out of tunic 16 mm wide. Small mytilid bivalve embedded in anterior tunic between the siphon bases. Distribution: Australia, Guam, Indonesia, Sri Lanka, Malaysia, Singapore, E. Africa, Caribbean, Puerto Rico, Martinique, Brazil. Detailed references with illustrations: Van Name (1945), Kott (1985), Monniot F. (2018 c). Additional references: Monniot C. & Monniot F. (1994), Lambert (2003), Rocha et al. (2012), Lee et al. (2016).
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): 1-38, DOI: 10.11646/zootaxa.4933.1.1
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Taxonomic Classification Tree
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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.
Imageimage/png© Lambert, Gretchen;Lee, Serina Siew-Chen;Teo, Serena Lay-MingLambert, Gretchen;Lee, Serina Siew-Chen;Teo, Serena Lay-Ming
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