Monhystrella Cobb, 1918

Leduc, Daniel, 2015, New species of Thelonema, Metasphaerolaimus, and Monhystrella (Nematoda, Monhysterida) from Kermadec Trench, Southwest Pacific, European Journal of Taxonomy 158, pp. 1-19 : 13-15

Genus Monhystrella Cobb, 1918

Diagnosis (modified from Fonseca & Decraemer 2008)

Short body length (<0.8 mm). Small somatic setae often present. Six outer labial and four cephalic sensillae usually setiform. Buccal cavity tubiform, funnel-shaped or conoid, often with cuticularised walls; denticles usually present, but difficult to observe in small species. Circular amphideal fovea usually 1.5–2.0 or more head diameters from anterior end. Posterior part of pharynx enlarged forming a single or double bulb without valves. Secretory-excretory system usually absent. Female reproductive system short to medium sized; vulva near mid-body. Spicules mostly arcuate and short (<2 abd). Tail usually with ventrally curved conical anterior portion and dorsally curved cylindrical filiform posterior portion. Spinneret a long and slender cone or cylinder.

Remarks

The taxonomy of all marine Monhystrella species was revised by Fonseca & Decraemer (2008), who provided a detailed diagnosis of the genus and a key to all thirteen valid marine species; no new marine species have been described since.