Web22. jul 1997. · In a step toward a classification that reflects phylogeny of protostome worms, the Annelida can be redefined to include the echiurans, pogonophorans, clitellates, and polychaetes. The Annelida can then be identified among the protostomes by the … We would like to show you a description here but the site won’t allow us. WebThe polychaete worms are problematic in that molecular phylogenetic analyses carried out the last 20 years indicate that they are not a natural (monophyletic) group; rather, this clade includes the phylums Sipunculata and Echiura, as well as a small enigmatic group of worms called the beard worms (pogonophorans+vestimentiferans; about 100 species).
Clitellata - Wikipedia
Web12. apr 2024. · In contrast, unique mitochondrial gene order defines at least one higher‐level clade within Nereididae. View. ... (68 polychaetes, 1 oligochaete, 1 echiuran, 3 sipunculans, 2 nemerteans, 1 ... good virginia colleges
Molecular evidence that echiurans and pogonophorans are
WebANNELIDS. Segmented worms of the phylum Annelida are divided into three classes: Polychaeta (marine polychaete worms), Pogonophora (beard worms), and Clitellata … WebNotoproctinae. Maldaninae. Euclymeninae. Nicomachinae. Maldanidae is a family of more than 200 species of marine polychaetes commonly known as bamboo worms or maldanid worms. [1] [2] They belong to the order Capitellida, in the phylum Annelida. [3] They are most closely related to family Arenicolidae, and together form the clade Maldanomorpha. WebClitellata. The Clitellata are a class of annelid worms, characterized by having a clitellum - the 'collar' that forms a reproductive cocoon during part of their life cycles. The clitellates comprise around 8,000 species. Unlike the class of Polychaeta, they do not have parapodia and their heads are less developed. good virtual baby shower games