Monhystrella Cobb 1918

• Main Author: Leduc, Daniel
• Format: Text
• Language: unknown
• Published: Zenodo 2015
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Adenophorea; Monhysterida; Monhysteridae; Monhystrella; Norwegian Sea; Pacific; Charcot
• Online Access: https://dx.doi.org/10.5281/zenodo.3793574; https://zenodo.org/record/3793574

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. *Dorso–caudal apophyses present but very thin and may be difficult to observe. **From re–description by Jensen (1992) 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. : Published as part of Leduc, Daniel, 2015, New species of Thelonema, Metasphaerolaimus, and Monhystrella (Nematoda, Monhysterida) from Kermadec Trench, Southwest Pacific, pp. 1-19 in European Journal of Taxonomy 158 on pages 13-15, DOI: 10.5852/ejt.2015.158, http://zenodo.org/record/3788050 : {"references": ["Fonseca G. & Decraemer W. 2008. State of the art of the free-living marine Monhysteridae. Journal of the Marine Biological Association of the United Kingdom 88: 1371 - 1390. http: // dx. doi. org / 10.1017 / S 0025315408001719", "Jensen P. 1992. Predatory nematodes from the deep sea: description of species from the Norwegian Sea, diversity of feeding types and geographical distribution. Cahiers de Biologie Marine 33: 1 - 23.", "Gourbault N. & Boucher G. 1981. Nematodes abyssaux (Campagne Walda du N / O \" Jean Charcot \") III. Une sous-famille et six especes nouvelles de Sphaerolaimidae. Bulletin du Museum national d'Histoire naturelle de Paris 4: 1035 - 1052.", "Fadeeva N. P. 1983. A contribution to the family Sphaerolaimidae Filipjev, 1918 (Nematoda, Monhysterida) from the Sea of Japan. Zoologichesky Zhurnal 9: 1321 - 1333."]}