Vol. 62, 2023
Discovery of a New Sea Spider
Belonging to the Genus Pycnogonum
(Pycnogonida: Pycnogonidae) in the Mesophotic Zone of Jejudo Island,
Lee1, Jin-Ho Park2, and Taeseo Park3,*
of Ecoscience, Ewha Womans University, Seodaemun-gu, Seoul, 03760,
Republic of Korea. E-mail: firstname.lastname@example.org (Lee)
2Computational Biology Institute, The George
Washington University, Washington, DC, 20052, USA. E-mail:
3National Institute of Biological Resources, Incheon,
22689, Republic of Korea. *Correspondence: E-mail: email@example.com
(Received 5 January 2022 / Accepted 17
February 2023 / Published 22 May 2023)
Communicated by Benny K.K. Chan
A new species of the genus Pycnogonum was discovered in the
mesophotic zone of Munseom Islet, Jejudo Island, Korea. Pycnogonum (Nulloviger) bifurcatum sp. nov. is the first
case of sea spiders in Korean fauna not only included in the subgenus
Nulloviger but also collected in the mesophotic zone of Munseom Islet.
The new species is morphologically close to Pycnogonum (Pycnogonum) asiaticum and P. (N.) carinatum, sharing the granular
integument, the dorsomedian tubercles on the trunk, and the post-ocular
tubercle. The new species can be easily distinguished from the
congeners by combination of the following characteristics: the
prominent dorsomedian tubercles on the trunk, the lateral processes 1–3
touching each other, and the small auxiliary claws. A key is provided
to distinguish 12 species of the subgenus Nulloviger morphologically, and
molecular data of the new species are provided for species
identification and further studies.
Key words: Molecular data,
Munseom Islet, Nulloviger,
Sea spider, Subgenus.
Citation: Lee D, Park JH, Park T. 2023.
Discovery of a new sea spider belonging to the genus Pycnogonum (Pycnogonida:
Pycnogonidae) in the mesophotic zone of Jejudo Island, Korea. Zool Stud