Category: Cycloneuralia

Belongs within: Enoplia. The Tobrilina are a clade of nematodes supported by SSU rDNA analysis, though no obvious morphological characters unite them (Ley & Blaxter 2002). The Prismatolaimidae have a wide, prismatic stoma whereas Tobriloidea usually have a funnel-shaped stoma armed with teeth at its base. <==Tobrilina    |–TobriloideaLB02    |    |–TriodontolaimidaeLB02    |    |–RhabdodemaniidaeLB02    |    |–PandolaimidaeLB02    |    `–TobrilusFB90 [incl. TrilobusFB90; TobrilidaeLB02]    |         `–‘Trilobus’ gracilisD01    `–Prismatolaimidae [Prismatolaimoidea]LB02         |–Prismatolaimus de… Continue reading Tobrilina

Belongs within: Dorylaimia. The Mononchida are a group of mostly soil-dwelling (rarely freshwater) predatory nematodes. The stoma is wide in members of the Mononchina but narrow in the Bathyodontina (Freckman & Baldwin 1990). Characters (Ahmad & Jairajpuri 2010): Medium to large nematodes, generally well over 1 mm long. Lip region expanded, lips and labial papillae… Continue reading Mononchida

Belongs within: Nematoda.Contains: Euchromadorinae. The Chromadorida are a mostly marine group of free-living nematodes, with a small number of members in fresh water or soil. The anterior sensilla are usually arranged in two circlets in Achromadoridae and Cyatholaimidae but in three circlets in other families. Characters (Decraemer & Smol 2006): Cuticle with transverse striae and… Continue reading Chromadorida

Belongs within: Nematoda.Contains: Xyalidae. The Monhysterida are a group of free-living nematodes, often characterised by their outstretched female reproductive system though this has been shown to occur in members of other nematode lineages. Two ovaries are generally present in Linhomoeina but only one in Monhysteroidea. Characters (Coomans & Eyualem-Abebe 2006): Small to medium-sized, more or… Continue reading Monhysterida

Belongs within: Nematoda. The Desmodorida are a mostly marine (but sometimes freshwater) group of free-living nematodes. A cephalic capsule is absent in Microlaimoidea but may be present in Desmodoroidea. Characters (Decraemer & Smol 2006): Body appears yellowish to brownish in glycerin preparations. Body cuticle with transverse striae or annulated, rarely smooth; ornamentation present or absent,… Continue reading Desmodorida

Belongs within: Secernentea.Contains: Criconematina, Tylenchoidea, Hoplolaimina, Anguinoidea, Neotylenchidae, Parasitylenchidae, Sphaerulariidae, Allantonematidae, Paurodontinae. The Tylenchida are a group of nematodes that are commonly found as plant parasites. Members of the clade are united by the presence of a protrusible stylet (Siddiqi 2000). Representatives include the Sphaerularioidea, species of which are usually internal parasites of insects or… Continue reading Tylenchida

Belongs within: Vinctiplicata. The Priapulida are free-living, unsegmented marine worms with a muscular, eversible proboscis. Characters (Land 1970): Vermiform, unsegmented animals. Body cylindrical, bilaterally symmetrical with strong tendency to radial symmetry, divisible in at least two regions: abdomen and introvert, the latter serving as locomotory organ and invaginable into the former. Ectoderm a columnar epithelium, covered with… Continue reading Priapulida

Belongs within: Dorylaimia. The Dorylaimina are nematodes bearing an esophagus that is swollen and muscular posteriorly, and a simple hollow stylet. <==Dorylaimina    |–DorylaimellusFB90 [BelondiridaeLB02, Belondiroidea]    |–Tylencholaimoidea [Leptonchoidea]LB02    |    |  i. s.: TylencholaimellusFB90    |    |–LeptonchusMM02 [LeptonchidaeLB02]    |    |–TylencholaimidaeMM02    |    |–AulolaimoididaeLB02    |    `–MydonomidaeLB02    `–Dorylaimoidea [Actinolaimoidea]LB02         |  i. s.: CarcharolaimusFB90         |–AporcelaimusMM02 [AporcelaimidaeLB02]         |–QudsianematidaeLB02         |–NordiidaeLB02         |–ActinolaimusWh02 [ActinolaimidaeLB02]         |    `–A. hintoniWh02         |–DorylaimidaeLB02         |    |–DorylaimusD01         |    |    |–D. keiliniWh02         |    |    `–D. stagnalisD01         |    `–MesodorylaimusWI89         `–LongidoridaeLB02              |–ParalongidorusWy02              |–LongidorusFB90              |    |–L. caespiticolaWy02              |    |–L. elongatusWy02              |    `–L. leptocephalusWy02              `–XiphinemaWy02                   |–X. americanumLB02                   |–X. diversicaudatumWy02                   |–X.… Continue reading Dorylaimina

Belongs within: Cycloneuralia.Contains: Dorylaimia, Enoplia, Desmoscolecida, Monhysterida, Chromadorida, Desmodorida, Araeolaimida, Plectida, Secernentea. The Nematoda, nematodes or roundworms, are a ubiquitous assemblage of slender-bodied, unsegmented worms in which only longitudinal muscles are present in the body wall. With the exception of some animal parasites, most species are minute in size. <==Nematoda [Adenophorea, Aphasmidia, Ascaridatina, Nemata, Nematelmia, Nematelminthes, Nemates,… Continue reading Nematoda