Higher Classification: > Kingdom Animalia > Subkingdom Eumetazoa > Phylum Nematoda > Class Chromadorea > Subclass Chromadoria > Order Monhysterida > Suborder Monhysterina > Superfamily Sphaerolaimoidea > Family Xyalidae > Genus Theristus

Theristus acer Bastian, 1865

Rank: Species
Taxon Status: accepted

Relationships towards this taxon

Genus group names

*Theristus*	Bastian, 1865	accepted genus name
*Penzancia*	de Man, 1889	synonym
*Theristus (Penzancia)*	de Man, 1889	synonym

Literature

original description	Bastian, H. C. (1865). Monograph of the Anguillulidae, or Free Nematoids, Marine, Land, and Freshwater; with Descriptions of 100 New Species. The Transactions of the Linnean Society of London. Volume XXV. Part II:73-184.
basis of record	De Smet, G.; Vincx, M.; Vanreusel, A.; Vanhove, S.; Vanaverbeke, J.; Steyaert, M. (2001). Nematoda - free living. In: Costello, M.J. et al. (Ed.) (2001). European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels, 50. 161-174.
additional source	Allgén, C. A. (1959). Über einige, meistens neue, freilebende marine Nematoden aus dem Feuerland-Archipel (Schwedische Südpolar-Expedition 1901-1903). Zoologischer Anzeiger. Bd. 163, Heft 7/8: 222-243.
additional source	Allgén, C. A. (1957). On a small collection of freeliving marine nematodes from Greenland and some other arctic regions with reviews and analyses of the compositions of all hitherto known arctic nematode faunas. Meddr. Gronland. 159 (3): 1- 42.
additional source	Brunel, P., L. Bosse & G. Lamarche. (1998). Catalogue of the marine invertebrates of the estuary and Gulf of St. Lawrence. Canadian Special Publication of Fisheries and Aquatic Sciences, 126. 405 pp.
additional source	Schuurmans Stekhoven, J. H. Jr. (1942). Les nématodes libres marins du Bassin de Chasse d'Ostende [The free-living nematods of the Sluice Dock at Ostend]. Med. K. Belg. Inst. Nat. Wet. 18(12): 1-26.
additional source	Yeates, G. W. (2010). Phylum Nematoda: roundworms, eelworms. in: Gordon, D.P. (Ed.) (2010). New Zealand inventory of biodiversity: 2. Kingdom Animalia: Chaetognatha, Ecdysozoa, Ichnofossils. pp. 480-493.
additional source	Allgén, C. A. (1959). Freeliving marine nematodes. Further zoological results of the Swedish Antarctic expedition, 1901-1903 under the direction of Dr. Otto Nordenskjold. V(2) P.A. Norstedt & Söner: Stockholm. 293 pp.
additional source	Zhou, H. (2001). Effects of leaf litter addition on meiofaunal colonization of azoic sediments in a subtropical mangrove in Hong Kong. Journal of Experimental Marine Biology and Ecology, Elsevier, Amsterdam 256(1):99-121.
additional source	Semprucci, F. (2013). Marine Nematodes from the Shallow Subtidal Coast of the Adriatic Sea: Species List and Distribution. International Journal of Biodiversity. 2013: 1-9.
additional source	Allgén, C. A. (1953). Revision der freilebenden marinen Nematoden aus der Umgebung der Staatlichen Zoologischen Station Kristineberg an der Westküste Schwedens. Zoologische Jahrbucher (Systematik). 81: 548-603.
additional source	Steyaert, M.; Vanaverbeke, J.; Vanreusel, A.; Barranguet, C.; Lucas, C.; Vincx, M. (2003). The importance of fine-scale, vertical profiles in characterising nematode community structure. Estuarine, Coastal and Shelf Science. 58(2): 353-366.
additional source	Coomans, A. V. (1989). Overzicht van de vrijlevende nematofauna van België (Nematoda). [The freeliving nematofauna of Belgium: a review.]. In Wouters, K.; Baert, L. (Ed.): Invertebraten van België = Invertébrés de Belgique: Verhandelingen van het Symposium "Invertebraten van België" = Comptes rendus du Symposium "Invertébrés de Belgique" = Proceedings of the Symposium "Invertebrates of Belgium". Brussel, 25-26 november 1988. Koninklijk Belgisch Instituut voor Natuurwetenschappen: Brussel, Belgium. 43-56.
additional source	Muller, Y. (2004). Faune et flore du littoral du Nord, du Pas-de-Calais et de la Belgique: inventaire. [Coastal fauna and flora of the Nord, Pas-de-Calais and Belgium: inventory]. Commission Régionale de Biologie Région Nord Pas-de-Calais: France. 307 pp.
additional source	Jensen, P. (1986). The nematode fauna in the sulphide-rich brine seep and adjacent bottoms of the East Flower Garden, NW Gulf of Mexico. II. Monhysterida. Zoologica Scripta. 15(1): 1-11.
additional source	Various Authors (2000). Nematode filing cabinet of the Marine Biology Section Ugent - in combination with the NemasLan Ms-Access database (published on CD-Rom, 2000)
additional source	Allgén, C. A. (1939). Weitere freilebende Nematoden aus dem Vättern (Südschweden). Festschr. Embrik Strand (Riga). V: 384-394.
additional source	Jensen, P. (1984). Ecology of benthic and epiphytic nematodes in brackish waters. Hydrobiologia. 108: 201-217.
additional source	Liu, J.Y. [Ruiyu] (ed.). (2008). Checklist of marine biota of China seas. China Science Press. 1267 pp.
additional source	Integrated Taxonomic Information System (ITIS).
additional source	Kito, K. (1981). Studies on the free-living marine nematodes from Hokkaido, IV. Jour. Fac. Sci. Hokkaido Univ. Ser. VI, Zool. 22 (3): 250-278.
additional source	Warwick, R. M. (1971). Nematode associations in the Exe estuary. J. mar. biol. Ass. U. K. 51: 439-454.
additional source	Heip, C.; Herman, R.; Vincx, M. (1983). Subtidal meiofauna of the North Sea: A review. Biol. Jb. Dodonaea. 51: 116-170.
additional source	Lorenzen, S. (1977). Revision der Xyalidae (freilebende Nematoden) auf der Grundlage einer kritischen Analyse von 56 Arten aus Nord- und Ostsee. Veroff. Inst. Meeresforsch. Bremerh. 16: 197-261.
additional source	Leduc, D.; Gwyther, J. (2008). Description of new species of Setosabatieria and Desmolaimus (Nematoda: Monhysterida) and a checklist of New Zealand free-living marine nematode species. New Zealand Journal of Marine and Freshwater Research. 42(3): 339-362.
additional source	Gerlach, S. A. (1965). Freilebende Meeresnematoden aus der Gezeitenzone von Spitzbergen. Veröffentlichungen des Instituts für Meeresforschung in Bremerhaven. 9: 109-172.
additional source	Schuurmans Stekhoven, J. H. Jr. (1935). Freeliving Marine Nemas of the Belgian Coast. I. and II. Mém. Mus. R. Hist. Nat. Belg. 72: 1-36.
additional source	Allgén, C. A. (1946). Letzter Bericht über freilebende Nematoden aus dem Schalensand- und Kiesboden der Westküste Norwegens. Arkiv for Zoologi. 37 A (15): 1-26.
taxonomy source	Meldal, B. H.; Debenham, N. J.; De Ley, P.; De Ley, I. T.; Vanfleteren, J. R.; Vierstraete, A. R.; Bert, W.; Borgonie, G.; Moens, T.; Tyler, P. A.; Austen, M. C.; Blaxter, M. L.; Rogers, A. D.; Lambshead, P. (2007). An improved molecular phylogeny of the Nematoda with special emphasis on marine taxa. Molecular Phylogenetics and Evolution. 42(3): 622-636.
ecology source	Schuurmans Stekhoven, J. H. Jr. (1954). IX. Vrijlevende Nematoden. Veranderingen in de Flora en Fauna van de Zuiderzee (thans Ijsselmeer) na de afsluiting in 1932. 169-185.
ecology source	Bastian, H. C. (1865). Monograph of the Anguillulidae, or Free Nematoids, Marine, Land, and Freshwater; with Descriptions of 100 New Species. The Transactions of the Linnean Society of London. Volume XXV. Part II:73-184.

Genbank

Taxonomy

NeMys

Citation

Nemys eds. (2025). Nemys: World Database of Nematodes. Theristus acer Bastian, 1865. Via: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvantidis, C.; Appeltans, W. (2011) European Register of Marine Species, Accessed through PESI at http://www.eu-nomen.eu/portal/taxon.php?GUID=urn:lsid:marinespecies.org:taxname:121601