Baseodiscus ohtsukai, Kajihara & Abukawa & Chernyshev, 2022

Kajihara, Hiroshi, Abukawa, Shushi & Chernyshev, Alexei V., 2022, Exploring the basal topology of the heteronemertean tree of life: establishment of a new family, along with turbotaxonomy of Valenciniidae (Nemertea: Pilidiophora: Heteronemertea), Zoological Journal of the Linnean Society 196, pp. 503-548 : 533-534

publication ID

https://doi.org/ 10.1093/zoolinnean/zlac015

publication LSID

lsid:zoobank.org:pub:78C56409-FCCF-4116-8D8C-FF66B247C56C

DOI

https://doi.org/10.5281/zenodo.7043852

persistent identifier

https://treatment.plazi.org/id/5DBE9E10-9A24-447B-9A7F-EE5DD10891E0

taxon LSID

lsid:zoobank.org:act:5DBE9E10-9A24-447B-9A7F-EE5DD10891E0

treatment provided by

Plazi

scientific name

Baseodiscus ohtsukai
status

sp. nov.

BASEODISCUS OHTSUKAI SP. NOV.

( FIG. 7D, E View Figure 7 )

Zoobank registration: u r n: l s i d: z o o b a n k. org:act: 5DBE9E10-9A24-447B-9A7F-EE5DD10891E0.

Material examined: Holotype, ICHUM 6327 View Materials , 29 May 2001 off Toi Cape (31°19′12″N, 131°21′00″E), Kagoshima, Japan, 118 m depth, station 12 of the R / V Toyoshio-maru Cruise 01-06, collected by H. Kajihara. GoogleMaps

Sequences: From the holotype: LC178592 View Materials , 18S (1799 bp) ; LC178622 View Materials , 28S (2117 bp) ; LC178667 View Materials , 16S (456 bp) ; LC190945 View Materials , COI (629 bp) .

Etymology: The new specific name is a noun in the genitive case, from Prof. Susumu Ohtsuka, a Japanese crustacean biologist, leader of marine biodiversity studies with the R/V Toyoshio-maru of Hiroshima University.

Description: Body broad, dorsoventrally flattened, 15 cm long, 4 mm wide; ground colour white, dorsally with wide purplish brown stripe, ventrally with minute flecks of same colour (lacking in front of cephalic furrow); transverse cephalic furrow present, encircling neck; secondary furrows present; small, black ocelli distributed along dorso-lateral surfaces of head; proboscis pore sub-terminal; mouth small ( Fig. 7D, E View Figure 7 ). Found in mucus tube formed with mud and sand particles.

Distribution: So far known only from the type locality, sublittoral, off southern Kyushu in the Pacific (present study).

Remarks: Baseodiscus ohtsukai looks similar to B. urgorrii in that it has a whitish background colour and a broad, mid-dorsal longitudinal stripe, but differs from the latter in the colour of the stripe, which is more reddish than that in B. urgorrii .

R

Departamento de Geologia, Universidad de Chile

V

Royal British Columbia Museum - Herbarium

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