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List of annelid families describes the taxa relationships in the phylum Annelida, which contains more than 17,000 extant species including ragworms, earthworms, and leeches. [ 1 ] Class Polychaeta
Although research since 1997 has radically changed scientists' views about the evolutionary family tree of the annelids, [10] [11] most textbooks use the traditional classification into the following sub-groups: [8] [12] Polychaetes (about 12,000 species [6]). As their name suggests, they have multiple chetae ("hairs") per segment.
The phylogenetic tree of the leeches and their annelid relatives is based on molecular analysis (2019) of DNA sequences. Both the former classes "Polychaeta" (bristly marine worms) and "Oligochaeta" (including the earthworms) are paraphyletic: in each case the complete groups would include all the other groups shown below them in the tree.
The other members of the Lophotrochozoa are the annelid worms and seven marine phyla. [31] The diagram on the right summarizes a phylogeny presented in 2007. Because the relationships between the members of the family tree are uncertain, it is difficult to identify the features inherited from the last common ancestor of all molluscs. [32]
Pages in category "Annelid families" The following 111 pages are in this category, out of 111 total. This list may not reflect recent changes. ...
Pleistoannelida is a group of annelid worms that comprises the vast majority of the diversity in phylum Annelida.Discovered through phylogenetic analyses, it is the largest clade of annelids, comprised by the last common ancestor of the highly diverse sister groups Errantia and Sedentaria (Clitellata and related polychaetes) and all the descendants of that ancestor.
Relationships of Ecdysozoa to each other and to annelids, etc., [101] [failed verification] including euthycarcinoids [102] Higher up the "family tree", the Annelida have traditionally been considered the closest relatives of the Panarthropoda, since both groups have segmented bodies, and the combination of these groups was labelled Articulata .
The annelids, collectively called Annelida, are a large phylum of animals, comprising the segmented worms, with about 15 000 modern species including the well-known earthworms and leeches The main article for this category is Annelid .
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