Pseudaraeolaimus Chitwood 1951

• Main Author: Holovachov, Oleksandr
• Format: Text
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Nematoda; Chromadorea; Araeolaimida; Diplopeltidae; Pseudaraeolaimus; Barents Sea; White Sea; New Zealand
• Online Access: https://dx.doi.org/10.5281/zenodo.3853255; https://zenodo.org/record/3853255

Key to species of Pseudaraeolaimus Chitwood, 1951 See Table 3 for additional diagnostic characters. 1. Body 2 mm long; amphidial fovea with transverse striation............................................................................................................................................................. P. laminata (Vitiello, 1972) comb. nov. – Body shorter than 1.5 mm long; amphidial fovea without transverse striation................................ 2 2. Ocelli present.................................................................................................. P. ocellatus Kito, 1981 – Ocelli absent..................................................................................................................................... 3 3. Amphidial fovea a broad loop, less than 1.5 times long as it is wide... P. perplexus Chitwood, 1951 – Amphidial fovea a narrow loop, more than 3 times long as it is wide............................................. 4 * – not available, specimens of particular sex are unknown 4. Cervical setae short, only two pairs at level with amphidial fovea....................................................................................................................................... P. cassidaigniensis (Vitiello, 1972) comb. nov. – Cervical setae long, two pairs at level with amphidial fovea and 4–5 pairs at level with midpharynx.................................................................... P. cylindricauda (Allgén, 1932) comb. nov. Family Diplopeltidae Filipjev, 1918 Diagnosis (emended after Fonseca & Bezerra 2014) Cuticle visually smooth, finely striated or coarsely annulated.Lateral alae absent.Somatic sensilla present. Inner and outer labial sensilla papilliform. Cephalic sensilla setiform; their bases located at the base of the labial region, anterior to amphidial fovea. Cervical (paramphidial) sensilla present in some genera, located at the level of the amphid and posterior to it. Deirid absent. Ocelli present or absent. Amphidial fovea unispiral or loop-shaped. Secretory-excretory system present. Oral opening apical or shifted either to dorsal or ventral body side. Buccal cavity tubular, cylindrical or undifferentiated. Teeth-like structures absent. Pharynx variable in shape; pharyngeal lumen uniform in thickness along the entire pharynx length; valves absent. Female reproductive system didelphic-amphidelphic or monodelphic-prodelphic. Ovaries outstretched or reflexed antidromously. Male reproductive system diorchic. Posterior testis is either anteriorly oriented and reflexed in the anterior section (reflexed terminal section of the germinal zone) or is posteriorly directed. Spicules symmetrical; gubernaculum present. Precloacal sensilla present in some genera. Three caudal glands present, their nuclei are incaudal. Caudal glands open separately via three pores, or together via a common spinneret. Valid genera Araeolaimus de Man, 1888 = Araeolaimoides de Man, 1893 = Coinonema Cobb, 1920 = Parachromagaster Allgén, 1929 Belgopeltula gen. nov. Campylaimus Cobb, 1920 Cylindrolaimus de Man, 1880 Diplopeltis Cobb in Stiles & Hassal, 1905 = Dipeltis Cobb, 1891 = Discophora Villot, 1875 Diplopeltula Gerlach, 1950 Edalonema Andrássy, 2007 = Adelonema Holovachov & Sturhan, 2003 Intasia Tchesunov & Miljutina, 2008 Metaraeolaimoides De Coninck, 1936 Morlaxia Vincx & Gourbault, 1988 Mudwigglus Leduc, 2013 Pararaeolaimus Timm, 1961 Pseudaraeolaimus Chitwood, 1951 Southerniella Allgén, 1932 Family Diplopeltidae Filipjev, 1918 Diagnosis (emended after Fonseca & Bezerra 2014) Cuticle visually smooth, finely striated or coarsely annulated.Lateral alae absent.Somatic sensilla present. Inner and outer labial sensilla papilliform. Cephalic sensilla setiform; their bases located at the base of the labial region, anterior to amphidial fovea. Cervical (paramphidial) sensilla present in some genera, located at the level of the amphid and posterior to it. Deirid absent. Ocelli present or absent. Amphidial fovea unispiral or loop-shaped. Secretory-excretory system present. Oral opening apical or shifted either to dorsal or ventral body side. Buccal cavity tubular, cylindrical or undifferentiated. Teeth-like structures absent. Pharynx variable in shape; pharyngeal lumen uniform in thickness along the entire pharynx length; valves absent. Female reproductive system didelphic-amphidelphic or monodelphic-prodelphic. Ovaries outstretched or reflexed antidromously. Male reproductive system diorchic. Posterior testis is either anteriorly oriented and reflexed in the anterior section (reflexed terminal section of the germinal zone) or is posteriorly directed. Spicules symmetrical; gubernaculum present. Precloacal sensilla present in some genera. Three caudal glands present, their nuclei are incaudal. Caudal glands open separately via three pores, or together via a common spinneret. Valid genera Araeolaimus de Man, 1888 = Araeolaimoides de Man, 1893 = Coinonema Cobb, 1920 = Parachromagaster Allgén, 1929 Belgopeltula gen. nov. Campylaimus Cobb, 1920 Cylindrolaimus de Man, 1880 Diplopeltis Cobb in Stiles & Hassal, 1905 = Dipeltis Cobb, 1891 = Discophora Villot, 1875 Diplopeltula Gerlach, 1950 Edalonema Andrássy, 2007 = Adelonema Holovachov & Sturhan, 2003 Intasia Tchesunov & Miljutina, 2008 Metaraeolaimoides De Coninck, 1936 Morlaxia Vincx & Gourbault, 1988 Mudwigglus Leduc, 2013 Pararaeolaimus Timm, 1961 Pseudaraeolaimus Chitwood, 1951 Southerniella Allgén, 1932 : Published as part of Holovachov, Oleksandr, 2017, Belgopeltula belgica (Vincx & Gourbault, 1992) gen. et comb. nov. and Mudwigglus micramphidium sp. nov. from the west coast of Sweden, and reappraisal of the genus Pseudaraeolaimus Chitwood, 1951 (Nematoda: Araeolaimida: Diplopeltidae), pp. 1-21 in European Journal of Taxonomy 383 on pages 15-17, DOI: 10.5852/ejt.2017.383, http://zenodo.org/record/3839807 : {"references": ["Vitiello P. 1972. Sur quelques especes de Diplopeltula (Nematoda, Araeolaimida). 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