Baseodiscus princeps, (COE, 1901A)

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 : 538-539

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.7043861

persistent identifier

https://treatment.plazi.org/id/038A8132-EE48-ED62-FC6B-CA54FE94F8DE

treatment provided by

Plazi

scientific name

Baseodiscus princeps
status

 

BASEODISCUS CF. PRINCEPS View in CoL ( COE, 1901 A)

( FIG. 3O–Q View Figure 3 )

Baseodiscus curtus: Yamaoka, 1940: 234–236 View in CoL , textfig. 13, pl. XVI, figs 8–11 (Akkeshi, Japan).

Baseodiscus princeps: Iwata, 1954: 15 View in CoL ; Kajihara, 2017: 423, fig. 16.2e (Akkeshi, Japan).

Baseodiscus cf. princeps: Chernyshev, 2008: 271 View in CoL , fig. 1F–I (Amursky Bay, Russia).

? Taeniosoma princeps Coe, 1901a: 173–177 View in CoL , pl. XVI, figs 1–3, pl. XVIII, fig. 6 (Alaska).

Material examined: Three specimens. ICHUM 6339, extracted DNA and remaining body preserved in 99% EtOH; 12 June 2012, intertidal, under boulder, Daikoku-jima (42°57′39″N, 144°52′31″E), Hokkaido, Japan, collected by H. Kajihara. One specimen (DNA voucher: ICHUM 6340 View Materials ) GoogleMaps , 8 July 2011, off Iturup Island (44°53.05′N, 147°15.18′), 114 m depth, collected by A. V . Chernyshev during cruise 41 of the S/ V Akademik Oparin. One specimen (DNA voucher ICHUM 6341 View Materials ) , 25 July 2005, Aniwa Bay (46°06.9′N, 142°15.7′E), 25 m depth, collected by A. V GoogleMaps . Chernyshev during cruise 31 of the S/ V Akademik Oparin.

Sequences: From ICHUM 6339 View Materials : LC178604 View Materials , 18S (1785 bp) ; LC178636 View Materials , 28S (2119 bp) ; LC178685 View Materials , 16S (503 bp) ; LC190957 View Materials , COI (658 bp). From ICHUM 6340 View Materials : LC178605 View Materials , 18S (1797 bp) ; LC178637 View Materials , 28S (2090 bp) ; LC178686 View Materials , 16S (503bp) ; LC190958 View Materials , COI (658bp). From ICHUM 6341 View Materials : LC178606 View Materials , 18S (1796 bp) ; LC178638 View Materials , 28S (1202 bp) ; LC178687 View Materials , 16S (503 bp) ; LC190959 View Materials , COI (658 bp) .

Description: Background body colour bright yellow, dorsally mottled with irregular, light-brown patches often intensively fused together, especially in anterior part of body; dorsal mottling may extend ventrolaterally or even ventrally; body up to 30 cm long ( Fig. 3O–Q View Figure 3 ).

D i s t r i b u t i o n: N o r t h - w e s t Pa c i f i c: i n t e r t i d a l, Akkeshi, Hokkaido, Japan ( Yamaoka, 1940; present study); subtidal, Far East Russia, Aniwa Bay (25 m) and off Iturup (114 m) (present study). Baseodiscus princeps s.s. was originally described from Alaska (Cape Fox, Yakutat, Orca), USA ( Coe, 1901a).

Remarks: This species was first reported as Baseodiscus curtus by Yamaoka (1940) from Daikokujima, Akkeshi Bay, Hokkaido, Japan. Iwata (1954) applied the name Baseodiscus princeps to it. As Chernyshev (2008) pointed out, specimens from Far Eastern Russia differ from B. princeps s.s. in that the dark-coloured markings are present not only dorsally, but also ventrally. Barcode sequences from topotypes should eliminate this uncertainty as to the application of the name princeps .

POTENTIAL FOOD ITEMS

Unidentified terebellid polychaete sequences were detected by BLASTn searches against the NCBI database of COI sequences derived from ICHUM 6315 and ICHUM 6316 ( B. hemprichii ), ICHUM 6320 ( B. quinquelineatus ) and ICHUM 6322 ( B. aff. marmoratus ), and a 28S sequence from ICHUM 6324 ( B. aff. maculosus ), each with ~85% identity values. Some of the cloned COI sequences (658 bp) from ICHUM 6310 ( B. narusei ) were 99% identical (differing by two bases in 658 bp) with AB430534, from an octopus identified by Kaneko et al. (2011) as Octopus cyanea Gray, 1849.

Chernyshev & Polyakova (2018: 124) stated: ‘Some sequences isolated in the process of cloning of COI sequences from the specimen of Sonnenemertes cantelli 38DS belonged apparently to its prey (according to BLAST search, it is an unknown sipunculid – GenBank MF 512129). Moreover, a COI sequence (GenBank MF 512130) of a similar sipunculid was detected in the specimen of S. cantelli 31DS through direct sequencing.’

ICHUM

Invertebrate Collection of the Hokkaido University Museum

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Nemertea

Class

Pilidiophora

Order

Heteronemertea

Family

Valenciniidae

Genus

Baseodiscus

Loc

Baseodiscus princeps

Kajihara, Hiroshi, Abukawa, Shushi & Chernyshev, Alexei V. 2022
2022
Loc

Baseodiscus princeps:

Kajihara H 2017: 423
Iwata F 1954: 15
1954
Loc

Baseodiscus curtus: Yamaoka, 1940: 234–236

Yamaoka T 1940: 236
1940
Loc

Taeniosoma princeps

Coe WR 1901: 177
1901
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