Geocenamus longus Tarjan 1973
Authors/Creators
- 1. katarzynar @ miiz. waw. pl; https: // orcid. org / 0000 - 0001 - 6180 - 0392
- 2. gsikora @ miiz. waw. pl; https: // orcid. org / 0000 - 0002 - 4693 - 3848
- 3. mkubicz @ miiz. waw. pl; https: // orcid. org / 0000 - 0002 - 9098 - 3797
Description
Characteristics of Geocenamus longus
Systematics
Geocenamus longus (Wu, 1969) Tarjan, 1973
= Tylenchorhynchus longus Wu, 1969
= Merlinius longus (Wu, 1969) Sturhan, 1981
= Scutylenchus longus (Wu, 1969) Skwiercz, 1984
= Pathotylenchus longus (Wu, 1969) Eroshenko & Volkova, 1987
= Geocenamus longus (Wu, 1969) Brzeski, 1991
= Scutylenchus longus (Wu, 1969) Sturhan, 2011
= Geocenamus longus (Wu, 1969) Sturhan, 2012
Description. Figures 1 and 2. Measurements see Tables 1–3.
Female. Body straight to slightly bent ventrally when relaxed. Cuticle consists of two layers, tessellated with longitudinal striae at mid-body.Annuli 2.5–3.5 µm wide, flattened, striae shallow, irregular longitudinal striae divide the annuli into small blocks. Lateral field of adults with six lines, weakly crenated. Lateral field of juveniles with four lines only. Inner incisures sometimes not seen but lateral field crossed by short irregular transverse and oblique striae. Head offset by constriction, with 6–8 (mostly 7) annuli. Labial disc conspicuous. Cephalic framework weakly developed, not refractive. Labial annules divided into six segments by longitudinal striae. Stylet long and slender, cone longer than shaft, basal knobs relatively small, well developed. Deirids absent. Nerve ring slightly behind median bulb. Hemizonid near to excretory pore. Glandular pharyngeal basal bulb elongated, cylindrical. Vulva transverse with double epiptygma sunken into a distinct cavity, vagina swollen near vulva. Ovaries outstretched, paired. Spermatheca, round, well developed, filled with sperm cells. Phasmid situated at mid-tail. Tail tapering evenly to an irregularly striated terminus, bearing 23–35 annuli.
Male. Male slightly smaller than female. Bursa crenate, reaching to tail terminus. Spicule slightly bent.
Gubernaculum thickened.
Molecular characterization. 18S, 28S rDNA and mtCOI sequences were successfully sequenced from five independent G. longus individuals (four females and one juvenile). No intraspecific variation was observed within those sequences. Representative sequence fragments were deposited in GenBank under the following accession numbers: OM 618608 (18S rDNA), OM 618606 (28S rDNA) and OM 615893 (mtCOI). This study delivers the first molecular characterization of G. longus.
Notes
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Linked records
Additional details
Identifiers
Biodiversity
- Collection code
- OM
- Scientific name authorship
- Tarjan
- Kingdom
- Animalia
- Phylum
- Nematoda
- Order
- Tylenchida
- Family
- Belonolaimidae
- Genus
- Geocenamus
- Species
- longus
- Taxon rank
- species
- Taxonomic concept label
- Geocenamus longus Tarjan, 1973 sec. Rybarczyk-Mydłowska, Sikora & Kubicz, 2022
References
- Wu, L. Y. (1969) Three new species of the genus Tylenchorhynchus Cobb, 1913 (Tylenchidae: Nematoda) from Canada. Canadian Journal of Zoology, 47, 563 - 567.
- Tarjan, A. C. (1973) A synopsis of the genera and species in the Tylenchorhynchinae (Tylenchoidea, Nematoda). Proceedings of The Helminthological Society of Washington, 40 (1), 123 - 144.
- Sturhan, D. (1981) Studies on Geocenamus species from Germany (Nematoda: Dolichodoridae). Nematologica, 27 (3), 306 - 314. https: // doi. org / 10.1163 / 187529281 X 00539
- Skwiercz A. T. (1984) Two new species of the genus Scutylenchus Jajrajpuri, 1971 (Tylenchoidea: Nematoda) from Poland with a key to the species. Revue de Nematologie, 7, 87 - 93.
- Eroshenko, A. S. & Volkova, T. V. (1987) Nematodes Geocenamus patteruns n. sp. and Pathotylenchus nurserus n. gen. et n. sp. from rhisosphere of Coniferales of the Far East of the USSR. Parasitologiya, 21, 595 - 598.
- Brzeski, M. W. (1991) Taxonomy of Geocenamus Thorne and Malek, 1968 (Nematoda: Belonolaimidae). Nematologica, 37, 125 - 173. https: // doi. org / 10.1163 / 187529291 X 00169
- Sturhan, D. (2011) On lateral fields and deirids in Merliniinae (Tylenchida, Telotylenchidae) and the genus Pratylenchoides (Pratylenchidae). Journal of Nematode Morphology and Systematics, 14 (2), 179 - 182.
- Sturhan, D. (2012) Contribution to a revision of the family Merliniidae Ryss, 1998, with proposal of Pratylenchoidinae subfam. n., Paramerlinius gen. n., Macrotylenchus gen. n. and description of M. hylophilus sp. n. (Tylenchida). Journal of Nematode Morphology and Systematics, 15 (2), 127 - 147.