Gnathostomulidajaw worms(Also: gnathostomulids). Facebook. Twitter. KingdomAnimalia PhylumGnathostomulidajaw worms. Gnathostomulida: pictures (2). The Gnathostomulida are translucent microscopic, interstitial (i.e., living between Platyhelminthes (free-living flatworms), but were given phylum rank in Total unknown species (expert opinion): min; m. In this article we will discuss about Phylum Gnathostomulida: 1. Habitat of Phylum Gnathostomulida 2. Features of Phylum Gnathostomulida 3. Phylogenetic.
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Described in as aberrant Turbellaria flatwormsthe gnathostomulids are now considered related to the rotifers Rotifera and Micrognathozoa.
The phylum and single class encompasses two orders, Filospermoidea and Bursovaginoidea, phylum gnathostomulida latter with two suborders, Conophoralia and Scleroperalia.
The 12 families contain 25 genera, with fewer than valid species.
Physical characteristics These thread-shaped worms range from 0. Most species are colorless or transparent, but a few are bright red. The anterior end phylum gnathostomulida Filospermoidea is pointed, while that of Bursovaginoidea appears phylum gnathostomulida a rounded head.
phylum gnathostomulida The posterior end is rounded or extends into a tail. Cuticle is absent on the body surface of Phylum Gnathostomulida but single cilium in each epithelial cell rather than several percell.
Locomotion with the help of cilia by metachronal beating. Musculature of the body wall cross striated and weakly developed. Phylum Gnathostomulida are triploblastic phylum gnathostomulida.
Phylum Gnathostomulida - Oxford Scholarship
On the basis of the monociliate epithelium, the gnathostomulids appear to be a sister group of gastrotrichs, whose ectoderm and cilia are nevertheless covered by a unique lamellar exocuticle.
They occur from the intertidal zone to depths of hundreds of meters. There are close to described gnathostomulid species, but many more times that phylum gnathostomulida likely await discovery.
Gnathostomulids were first described, inas turbellarian Platyhelminthes free-living flatwormsbut were given phylum rank in The egg hatches into a miniature version of the adult, without a larval stage.
List of bilaterial animal orders There are approximately described species  and certainly many more phylum gnathostomulida yet undescribed.
The known species are grouped in two orders.