2-467: Multitubulatina Paucitubulatina The Chaetonotida is an order of gastrotrichs . They generally have a tenpin or bottle-like shape. Chaetonotids inhabit both freshwater and marine environments. They can be distinguished from other gastrotrichs by the absence of pores in the pharynx , and by the presence of adhesive glands at the posterior end of the animal only. Most freshwater species are parthenogenetic . The smooth or complex cuticle has
4-552: A variable number of adhesive tubes, and the pharyngeal lumen of Chaetonotids is Y-shaped. A valve may be present at the junction of the pharynx and midgut . The epidermis in most organisms in this order is partly syncytial . The Chaetonotids are divided into two suborders, Multitubulatina and Paucitubulatina. Multitubulatina are marine, hermaphroditic strap-shaped organisms. Paucitubulatina are mostly freshwater, bowling pin shaped organisms that can be hermaphroditic, parthenogenetic or both. This protostome -related article
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