Euborlasia Vaillant, 1890 (Nemertea: Pilidiophora) from Bocas del Toro: description of a new species, with comments on t
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ORIGINAL PAPER
Euborlasia Vaillant, 1890 (Nemertea: Pilidiophora) from Bocas del Toro: description of a new species, with comments on the systematics of the genus Natsumi Hookabe 1,2
&
Hiroshi Kajihara 3
Received: 18 January 2020 / Revised: 13 June 2020 / Accepted: 6 July 2020 # Senckenberg Gesellschaft für Naturforschung 2020
Abstract Members of the lineid heteronemertean genus Euborlasia Vaillant, 1890 are relatively large-bodied ribbon worms, often with mottled, dark coloration. We describe Euborlasia maycoli sp. nov. from Bocas del Toro, Panama, which represents the 11th member, as well as the first Caribbean representative of the genus. We infer the phylogenetic position of the new species among the family Lineidae based on phylogenetic analyses using partial sequences of the mitochondrial 16S rRNA and cytochrome c oxidase subunit I, the nuclear 18S and 28S rRNA, and histone H3 genes. The resulting phylogenetic tree suggests that Euborlasia is likely related closely to Corsoua Corrêa, 1963. Keywords COI . Heteronemertea . Marine invertebrates . Tropical
Introduction The Caribbean nemertean fauna was first explored by Bürger (1895a), who described Baseodiscus antillensis (Bürger, 1895a) and recorded Baseodiscus delineatus (Delle Chiaje, 1825) from Barbados. To date, approximately 60 species of nemerteans are known from the Caribbean (Table 1). These are from Barbados (Bürger 1895a; Kirsteuer 1974), Belize (Kirsteuer 1974; Schwartz and Norenburg 2005), Colombia (Kirsteuer 1977; Gonzalez-Cueto et al. 2014, 2017), Curaçao (Stiasny-Wijnhoff 1925; Corrêa 1963), Jamaica (Kirsteuer 1974), Panama (Coe 1940, 1951; Kirsteuer 1974; Schwartz and Norenburg 2005; Collin et al. 2005; Andrade et al. 2012; This article is registered in ZooBank under http://zoobank.org/ C0AE82B0-BB5A-4F6A-A3F3-A4E36668A341. Communicated by A. Martínez García * Natsumi Hookabe [email protected] 1
Graduate School of Science, Hokkaido University, Sapporo, Hokkaido 060-0180, Japan
2
Present address: Misaki Marine Biological Station, The University of Tokyo, Miura, Kanagawa 238-0225, Japan
3
Faculty of Science, Hokkaido University, N10W8 Kita-ku, Sapporo, Hokkaido 060-0180, Japan
Kvist et al. 2014), Puerto Rico (Coe 1901), Venezuela (Kirsteuer 1973), and the Virgin Islands (Corrêa 1961). The lineid heteronemertean genus Euborlasia Vaillant, 1890 consists of relatively large-bodied ribbon worms having a darkcolored body with a pale cephalic tip; the body surface is often ornamented with mottles and/or thin rings encircling the body and arranged at intervals. The type species Borlasia elizabethae McIntosh, 1874 was described based on material dredged at a depth of 146 m in the Northeast Atlantic, off Cape Finisterre on the west coast of Galicia, Spain. In addition to the type species, Euborlasia currently contains nine species: E. gotoensis Iwata, 1952 from Japan (Iwata 1952); E. hancocki, Coe 1940 from Mexico, Panama, and Peru (Coe 1940); E. inmaculata (Bürger, 1892) from Naples, Italy (Bürger 1892, 1895b); E. maxima Coe, 1905 from Ca
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