Graphonema Cobb, 1898

Datta, Tridip Kumar & Al-Helal, Md. Abdullah, 2023, Review of Euchromadorinae (Nematoda: Chromadorida) with description of a new species of Trochamus Boucher & De Bovée, 1971 from the Sundarban, India, Zootaxa 5278 (3), pp. 493-510 : 496

publication ID	https://doi.org/10.11646/zootaxa.5278.3.4
publication LSID	lsid:zoobank.org:pub:5B09ECEE-2A61-411F-A172-5FD86939905F
DOI	https://doi.org/10.5281/zenodo.7918077
persistent identifier	https://treatment.plazi.org/id/03AD7507-A422-B008-39BC-FCEAFC084DDF
treatment provided by	Plazi (2023-05-08 07:25:10, last updated 2024-11-29 15:50:45)
scientific name	Graphonema Cobb, 1898
status

Treatment

Graphonema Cobb, 1898 (emended after Warwick & Coles 1975 and Shimada et al. 2019)

Body cuticle with complex heterogeneous ornamentation. Anterior part of the body with hexagonal blocks and afterward the pattern changes with alternate hooking between rings. The rings are externally smooth and with crenate edges. Lateral differentiation, if present, like simple smooth band without forming elevated lateral ridge or wing-shaped form. Amphideal fovea either transverse slit-like without a double contour, or not observed. Six outer labial and four cephalic setae. Buccal cavity with a hollow dorsal onchium (tooth) and two lateral or ventrosublateral onchia, without rows of denticles. Pharynx without posterior terminal bulb. Spicules not jointed. Gubernaculum containing a dorsal piece and a pair of hammer- or L-shaped lateral pieces. Precloacal supplement absent. Pre- and postcloacal cuticular elevation also absent.

Type species: G. vulgare Cobb, 1898

List of valid species:

G. achaeta Platonova, 1971

G. amokura e (Ditlevsen, 1921) Inglis, 1969

G. antarcticum Shimada, Tsujimoto & Watanabe, 2019

G. arctica ( Filipjev, 1946) Warwick and Coles, 1975

G. georgei Inglis, 1969

G. mediterranea ( Allgén, 1942) Warwick & Coles, 1975

G. metuliferum Kito, 1981

G. northumbriae Warwick & Coles, 1975

G. parafricana ( Gerlach, 1958) Warwick & Coles, 1975

G. scampae ( Coles, 1965) Warwick & Coles, 1975

G. vulgare Cobb, 1898

Taxon inquirendum: G. sabangensis ( Steiner, 1915) Wieser, 1954

References

Allgen, C. A. (1942) Die freilebenden Nematoden des Mittelmeeres. Zoologische Jahrbucher, Systematik, Band 76, Heft 1 / 2, 1 - 102.

Cobb, N. A. (1898) Australian free-living marine nematodes. Proceedings of the Linnean Society of New South Wales, 23 (3), 383 - 407.

Coles, J. W. (1965) A critical review of the marine genus Euchromadora de Man, 1886. Bulletin of the British Museum (Natural History), 12, 157 - 194.

Filipjev, I. N. (1946) СvobodнozivUЩii нiмatodы iZ сiviрнogo лidovitogo okiaнa = Nematodes libres du bassin polaire (eng Free-living nematodes from the Arctic Ocean - Free-living nematodes of the polar basin). Trudy Dreifuiushchaiae Ekspeditsiia Glavsevmorputi na Ledokol'nom Parokhode G. Sedov 1937 - 1940, III, 158 - 184.

Gerlach, S. A. (1958) Freilebende Nematoden von den Korallenriffen des Roten Meeres. Kieler Meeresforschung, 14, 241 - 246.

Inglis, W. G. (1969) Convergence in the structure of the head and cuticle of Euchromadora species and apparently similar nematodes. Bulletin of the Natural History Museum, Zoology Series, 17 (5), 149 - 204.

Kito, K. (1981) Studies on the free-living marine nematodes from Hokkaido, IV. Journal of the Faculty of Science Hokkaido University, Series VI, Zoology, 22 (3), 250 - 278.

Platonova, T. A. (1971) Free-living marine nematodes from the Possjet bay of the Sea of Japan. Isledovanija fauni morjei, 8 (16), 72 - 108.

Shimada, D., Tsujimoto, M., and Watanabe, K. (2019). A New Free-living Marine Nematode Species of the Genus Graphonema (Nematoda: Chromadorida: Chromadoridae) from Antarctica. Species Diversity, 24, 61 - 67. https: // doi. org / 10.12782 / specdiv. 24.61

Steiner, G. (1915) Freilebende marine Nematoden von der K ¸ ste Sumatras. Zoologische Jahrbucher, Systematik, 38 (3 - 4), 223 - 244.

Warwick, R. & Coles, J. (1975) Notes on the free-living marine genus Euchromadora de Man, 1886 and its allies, with description of two new species (Chromadoridae: Nematoda). Journal of Natural History, 9, 403 - 412. https: // doi. org / 10.1080 / 00222937500770311

Wieser, W. (1954) Free-living marine nematodes II. Chromadoroidea. Report from the Lund University Chile Expedition. Acta University Lund, Neue Folge 2, 50 (16), 1 - 148.