Baseodiscus unicolor, Stiasny-Wijnhoff, 1925

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 : 527

publication ID	https://doi.org/ 10.1093/zoolinnean/zlac015
publication LSID	lsid:zoobank.org:pub:78C56409-FCCF-4116-8D8C-FF66B247C56C
persistent identifier	https://treatment.plazi.org/id/038A8132-EE73-ED5E-FF48-CA64FA84FD14
treatment provided by	Plazi
scientific name	Baseodiscus unicolor
status

Treatment

BASEODISCUS UNICOLOR View in CoL View at ENA STIASNY- WIJNHOFF, 1925

( FIG. 2L View Figure 2 )

Baseodiscus unicolor Stiasny-Wijnhoff, 1925: 103 View in CoL , textfig.3, pl. V, fig.7 (Spanish Water, Curaçao); Schwartz, 2009: 68, figs 22E, 23A–F (Cat Cay, Belize); Kvist et al., 2014: 291, in part (Bocas del Toro, Panama).

Sequences: KF935284 View Materials , 18S (1770 bp) ; KF935340 View Materials , 28S (2061 bp) ; KF935396 View Materials , H3 (238 bp) ; KF935451 View Materials , 16S (506 bp) ; KF935505 View Materials , COI (658 bp); determined by Kvist et al. (2014) and deposited in GenBank as isolate SK68, based on MCZ DNA 106302 View Materials , derived from a specimen found in the Bocas del Toro Archipelago , Panama, ~ 17 m depth, 18 March 2011, collected and identified by G. Giribet and deposited in MCZ under catalogue number IZ-135323 . EF124865 View Materials , 16S (539 bp), from isolate 694, collected and identified by M. Schwartz ‘from an extensive field of Porites sp. coral rubble around the edges of a mangrove channel at a depth of 0.5 m’ at Cat Cay, Belize ( Schwartz, 2009: 68) .

External features: Body brown to reddish brown in colour, without any distinctive pattern ( Fig. 2L View Figure 2 ) (cf. Schwartz, 2009: 69).

Distribution: Spanish Water, Curaçao (type locality; S t i a s n y - W i j n h o f f, 1 9 2 5); C a t C a y, B e l i z e

( Schwartz, 2009); Manawar Cay, Bocas del Toro Archipelago, Panama ( Kvist et al., 2014).

Remarks: We regard the two specimens analysed to represent B. unicolor . Stiasny-Wijnhoff (1925: 103) described the body colour as ‘a dark reddish brown without any markings’ after ‘preservation with sublimate and alcool [sic]’. There appear to be two distinct species along the Caribbean coasts of Central and South America, both having brownish body colour without any distinctive patterning. They seem to differ in the shade/depth of the brown colour; the dark-brown form should be referred to by the name B. unicolor in reference to Stiasny-Wijnhoff ’s (1925) original description. For the pale-coloured form, we establish B. giribeti ; see Remarks for that species (following).