Abstract
Amphipod material collected from Brazil on Ilha do Arvoredo, (Santa Catarina), Campos Basin, (Rio de Janeiro) and Espírito Santo Basin (Espírito Santo) in the southwestern Atlantic Ocean yielded new taxonomic findings for the subfamily Phtisicinae Vassilenko, 1968. Hemiproto wigleyi McCain, 1968, previously recorded from the Gulf of Mexico to the Caribbean Sea, is herein redescribed and recorded for the first time from the Brazilian coast. The type material of Phtisica verae Quitete, 1979, a poorly described species recorded from Brazil and based only on its original description, was examined and considered herein as a junior synonym of P. marina Slabber, 1769, a well-known and widely distributed species from the Atlantic Ocean and the Mediterranean Sea. In this paper, Phtisica marina is redescribed, with its two morphotypes of male gnathopod two, and compared with previous descriptions. The geographic distribution of both H. wigleyi and P. marina is provided.
Highlights
Caprellids are one of the frequently groups of Crustacea inhabiting mainly shallow water ecosystems, especially in tropical to temperate regions (Takeuchi & Lowry 2015)
We examined the type material of P. verae and concluded that it is a junior synonym of P. marina
Hemiproto wigleyi was first described by McCain (1968) who stated that the mandible setal formula is very similar to that of Phtisica, which is confirmed in the present study, regarding mandible setal formula (1–5–1 pattern for both Phtisica and Hemiproto)
Summary
Caprellids are one of the frequently groups of Crustacea inhabiting mainly shallow water ecosystems, especially in tropical to temperate regions (Takeuchi & Lowry 2015) They are part of an amphipod group that exhibits degenerated abdomens and pereopods 3–4 variously reduced (Barnard & Karaman 1991; Laubitz 1993; Ito et al 2008). As a result of some controversial evolutionary scenarios (Laubitz 1976, 1993; Takeuchi 1993; Ito et al 2008) The former suborder Caprellidea Leach, 1814 comprised seven families: Caprellidae Leach, 1814, Caprellinoididae Laubitz, 1993, Caprogammaridae Kudrjaschov & Vassilenko, 1966, Paracercopidae Vassilenko, 1968, Pariambidae Laubitz, 1993, Phtisicidae Vassilenko, 1968 and Protellidae McCain, 1970. This classification is followed in the present study, many arguments regarding molecular and morphological aspects have been presented against the validity of the suborder Senticaudata, which remains controversial. (Verheye et al 2015; d’Udekem d’Acoz & Verheye 2017)
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