DOI QR코드

DOI QR Code

Description of two new free-living marine nematode species of subgenus Quadricoma (Desmoscolecida, Desmoscolecidae, genus Tricoma) from Korea

  • Hyo Jin Lee (East Sea Environment Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Heegab Lee (East Sea Environment Research Center, Korea Institute of Ocean Science & Technology (KIOST)) ;
  • Hyun Soo Rho (East Sea Environment Research Center, Korea Institute of Ocean Science & Technology (KIOST))
  • Received : 2022.11.25
  • Accepted : 2022.12.13
  • Published : 2022.12.31

Abstract

During a survey of free-living marine nematodes of Korea, two new marine desmoscolecid nematodes belonging to subgenus Quadricoma Filipjev, 1922 were discovered. Tricoma (Q.) jejuensis sp. nov. and T.(Q.) unipapillata sp. nov. are described based on specimens obtained from washings of coarse sediments from eastern and southern coasts of Korea. Tricoma (Q.) jejuensis sp. nov. is characterized by having 33 quadricomoid body rings and inversion at main ring 23, pentagonal head with truncated anterior end, a pair of ocelli situated at main ring 6, somatic setae comprising of 8 pairs of subdorsal setae and 12 pairs of subventral setae, and relatively short spicules (42-46 ㎛ long). Tricoma (Q.) unipapillata sp. nov. is characterized by 44 quadricomoid body rings and inversion at main ring 32, somatic setae comprising of 7 pairs of subdorsal setae and 10 pairs of subventral setae, globular head truncated anterior end, relatively short and stumpy cephalic setae with cuticular flange, one single naked ventral median genital papillae situated on main ring 20, and spicules with a proximally marked capitulum. Detailed morphological descriptions and illustrations of these two new species are provided in this study.

Keywords

Acknowledgement

This research was supported by a grant from the National Marine Biodiversity Institute of Korea (2022M01100) and by the research projects of Korea Institute of Ocean Science and Technology(PEA0016).

References

  1. Allgen CA. 1935. Die freilebenden Nematoden des Oresunds. Capita Zool. 6:1-192. 
  2. Allgen CA. 1942. Die freilebenden Nematoden des Mittelmeeres. Zool. Jb. (Systematik). 76:1-102.
  3. Baylis HA and R Daubney. 1926. A Synopsis of the Families and Genera of Nematoda. British Museum. London. pp. 1-277. 
  4. Bezerra TN, E Pape, F Hauquier and A Vanreusel. 2021. Description and distribution of Erebussau nom. nov. pro Erebus Bussau, 1993 nec Erebus Latreille, 1810 with description of a new species, and of Odetenema gesarae gen. nov., sp. nov. (Nematoda: Desmoscolecida) from nodule-bearing abyssal sediments in the Pacific. Zootaxa 4903:542-562. https://doi.org/10.11646/zootaxa.4903.4.4 
  5. Burgess R. 2001. An improved protocol for separating meiofauna from sediments using colloidal silica sols. Mar. Ecol. Prog. Ser. 214:161-165. https://doi.org/10.3354/meps214161 
  6. Decraemer W. 1977. Scientific report on the Belgian expedition to the Great Barrier Reef in 1967. Nematodes IX. Four new species of Quadricoma Filipjev (Nematoda, Desmoscolecida). Zool. Scr. 6:275-292. https://doi.org/10.1111/j.1463-6409.1978.tb00780.x 
  7. Decraemer W. 1978. The genus Quadricoma Filipjev, 1922 with a redescription of Q. cobbi (Steiner, 1916), Q. crassicomoides Timm, 1970 and Q. loricata Filipjev, 1922 (Nematoda, Desmoscolecida). Cah. Biol. Mar. 19:63-89. 
  8. Decraemer W. 1983. Five new species of deep-sea Desmoscolecids (Nematoda-Desmoscolecida) from the Bay of Biscay. Bull. Inst. R. Sc. Nat. Belg. Biologie 55:1-26. 
  9. Decraemer W. 1985. Revision and phylogenetic systematics of the Desmoscolecida (Nematoda). Hydrobiologia 120:259-283. https://doi.org/10.1007/BF00045169 
  10. Decraemer W. 1998. On the deep-sea desmoscolecid fauna of the flat of Cap Vert (Nematoda: Desmoscolecida). Bull. Inst. R. Sc. Nat. Belg. Biologie 68:5-22. 
  11. Decraemer W and N Smol. 2006. Orders Chromadorida, Desmodorida and Desmoscolecida. pp. 497-573. In: Freshwater Nematodes: Ecology and Taxonomy. CABI Publishing. Wallingford, UK. https://doi.org/10.1079/9780851990095.049 
  12. Decraemer W and HS Rho. 2013. Order Desmoscolecida. pp. 351-372. In: Handbook of Zoology: Gastrotricha, Cycloneuralia and Gnathifera, vol. 2: Nematoda. De Gruyter. Berlin. https://doi.org/10.1515/9783110274257 
  13. Filipjev IN. 1922. Encore sur les Nematodes libres de la mer Noire. Tr. Stravrop. Skh. Inst. Zool. 1:83-184. 
  14. Freudenhammer I. 1975. Desmoscolecida aus der Iberischen Tiefsee, zugleich eine Revision dieser Nematoden-Ordnung. Meteor Forsch.-Ergebnisse, Reihe. Berlin 20:1-65. 
  15. Lim HW and CY Chang. 2005. Tricoma (Quadricoma) jindoensis, a new species of marine interstitial Nematoda (Desmoscolecida: Desmoscolecidae) from Jindo Island, Korea. Anim. Syst. Evol. Divers. 5:61-70. 
  16. Lorenzen S. 1969. Desmoscoleciden (eine Gruppe freilebender Meeresnematoden) aus Kustensalzwiesen. Veroff. Inst. Meeresforsch. Bremerh. 12:231-265. 
  17. Schepotieff A. 1907. Zur Systematik der Nematoideen. Zool. Anz. 31:132-161. 
  18. Stammer HJ. 1935. Desmoscolex aquaedulcis n. sp., der erste susswasserbewohnende Desmoscolecide aus einer slowenischen Hohle (Nemat.). Zool. Anz. 109:311-318. 
  19. Steiner G. 1916. Neue und wenig bekannte Nematoden von der Westkuste Afrikas. Zool. Anz. 47:322-350. 
  20. Soetaert K and W Decraemer. 1989. Eight new Tricoma species (Nematoda, Desmoscolecidae) from a deep-sea transect off Calvi (Corsica, Mediterranean). Hydrobiologia 183:223-247. https://doi.org/10.1007/BF00007243 
  21. Shirayama Y, T Kaku and RP Higgins. 1993. Double-sided microscopic observation of meiofauna using an HS-slide. Benthos Res. 44:41-44. https://doi.org/10.5179/benthos1990.1993.44_41 
  22. Timm RW. 1970. A revision of the nematoda order Desmoscolecida Filipjev, 1929. Univ. Calif. Publs. Zool. 93:1-115. 
  23. Timm RW. 1978. Marine nematodes of the order Desmoscolecida from McMurdo Sound, Antarctica. Antarctic Res. Ser. 26:225-236. https://doi.org/10.1029/AR026p0225