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WoRMS taxon details
original description
Michaelsen, W. (1919). Über die Beziehungen der Hirudineen zu den Oligochäten. <em>Mitteilungen aus dem Hamburgischen zoologischen Museum und Institut.</em> 36: 131-153., available online at https://www.biodiversitylibrary.org/page/29547391
page(s): 152; note: Michaelsen introduces a formal upper-level classification of the annelids [details]
taxonomy source
Erséus, Christer; Williams, B. W.; Horn, K. M.; Halanych, K. M.; Santos, S. R.; James, S. W.; Creuzé des Châtelliers, M.; Anderson, F. E. (2020). Phylogenomic analyses reveal a Palaeozoic radiation and support a freshwater origin for clitellate annelids. <em>Zoologica Scripta.</em> 49(5):614-640., available online at https://onlinelibrary.wiley.com/doi/10.1111/zsc.12426 [details] Available for editors  [request]
taxonomy source
Erseus, Christer; Kallersjo, Mari. (2004). 18S rDNA phylogeny of Clitellata (Annelida). <em>Zoologica Scripta.</em> 33(2): 187-196., available online at https://doi.org/10.1111/j.1463-6409.2004.00146.x [details] Available for editors [request]
additional source
Magalhães, Wagner F.; Hutchings, Pat; Oceguera-Figueroa, Alejandro; Martin, Patrick; Schmelz, Rüdiger M.; Wetzel, Mark J.; Wiklund, Helena; Maciolek, Nancy J.; Kawauchi, Gisele Y.; Williams, Jason D. (2021). Segmented worms (Phylum Annelida): a celebration of twenty years of progress through <em>Zootaxa</em> and call for action on the taxonomic work that remains. <em>Zootaxa.</em> 4979(1): 190-211., available online at https://www.biotaxa.org/Zootaxa/article/view/zootaxa.4979.1.18 [details] Available for editors [request]
additional source
Klinth, Mårten; Kreiling, Agnes-Katharina; Erseus, Christer. (2019). Investigating the Clitellata (Annelida) of Icelandic springs with alternative barcodes. <em>Fauna norvegica.</em> 39: 119-132., available online at https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/3043
note: Checklist for Iceland. Includes an updated list of Icelandic Clitellata with references [details] Available for editors [request]
 Present Inaccurate Introduced: alien Containing type locality
From editor or global species database
Taxonomy Michaelsen (1919: 152) introduced the term Clitellata as a class rank (for oligochaete and leech orders) in an upper-level classification of the Annelids in which he also included an order rank for polychaetes (in class Chaetopoda) and a class rank for echiurans and Sipunculans, all members of phylum Annelida currently. Here is his classification:
Kreis Annelides
I. Klasse Archiannelides,
II. Klasse Chaetopoda,
1. Ordnung Protochaeta,
2. Ordnung Polychaeta.
III. Klasse Clitellata.
1. Ordnung Oligochaeta.
2. Ordnung Hirudinea.
IV. Klasse Echiuroidea,
V. Klasse Sipunculoidea
Klasse Clitellata: Anneliden mit wohl ausgebildeter äußerer und innerer Metamerie, ohne Parapodien und ohne Fühler, Fühler-cirren und cirren, meist auch ohne Kiemen. Geschlechtsapparat zwittrig. Gonaden in einer kleineren Zahl bestimmter Segmente. Ein Clitellum vorhanden. Die Entwicklung ist direkt. Meist Süßwasser und Landtiere.
[In translation]
Class Clitellata: Annelids with well-developed external and internal metamerism, without parapodia and without antennae, tentacular cirri and cirri, mostly also without gills. Hermaphroditic. Gonads in a smaller number of specific segments. A clitellum is present. The development is direct. Mostly freshwater and land animals.
[details]
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