Cleavage patterns, cell-lineages and cell specification are clues to phyletic lineages in Spiralia

Autor:	Jo A. M. van den Biggelaar, Wim J.A.G. Dictus, André E. van Loon
Rok vydání:	1997
Předmět:	biology Phylogenetic tree media_common.quotation_subject Cell Biology Anatomy Cell lineage biology.organism_classification Cleavage (embryo) Evolutionary biology Spiralia Axis specification Phyletic gradualism Heterochrony Developmental Biology media_common
Zdroj:	Seminars in Cell & Developmental Biology. 8:367-378
ISSN:	1084-9521
DOI:	10.1006/scdb.1997.0161
Popis:	Embryos of molluscs, annelids, nemerteans and platyhelminthes show remarkable intra- and interphyletic resemblances and differences in mesentoblast, dorso–ventral axis and trochoblast specification. These variations have been used to investigate their evolutionary relationship. In molluscs and annelids a heterochronic shift parallels evolutionary relations based on adult characters. Nemerteans and platyhelminthes lack trochal cells and differ in the specification of the mesodermal precursor cell. Nemerteans also differ fundamentally with respect to axis specification related to the first cleavage. Therefore, close phylogenetic relations exist between molluscs and annelids, whereas nemerteans and platyhelminthes are only remotely related with each other and with molluscs and annelids.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::232f75a9cb8bc17c97ed7f838c9bf3a2 https://doi.org/10.1006/scdb.1997.0161 Zobrazit plný text záznamu Full Text from ScienceDirect