Early development of the aplacophoran mollusc Chaetoderma
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The early development of the trochophore larva of the aplacophoran Chaetoderma nitidulum (Mollusca: Caudofoveata = Chaetodermomorpha) is described using scanning and transmission electron microscopy and using fluorescence staining and confocal laser scanning microscopy of the muscle system. The most important features include the presence of a prototroch and a telotroch, serially arranged glandular cells (spiculoblasts) at the dorsal mantle, the occurrence of a ventral suture as a possible remnant of a former foot sole, and the presence of a pair of protonephridia. The development of the early anlagen of the circular body wall muscles does not show the anterior-posterior mode of formation that is typical for annelids, thus strengthening the hypothesis of a non-segmented ancestry of Mollusca.
Original language | English |
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Journal | Acta Zoologica |
Volume | 88 |
Issue number | 3 |
Pages (from-to) | 231 - 247 |
ISSN | 0001-7272 |
DOIs | |
Publication status | Published - 2007 |
ID: 11414161