The family Rhynchocinetidae Ortmann (Crustacea, Decapoda, Caridea) on the Brazilian coast

Abstract

The family Rhynchocinetidae Ortmann, 1890, presently in the superfamily Nematocarcinoidea Smith, 1884 and the genus Rhynchocinetes H. Milne Edwards, 1837, has always had a complex and controversial classification. Until recently, the only species known from the Brazilian coast was Rhynchocinetes rigens Gordon, 1936, which was transferred to the genus Cinetorhynchus. Rhynchocinetes typus H. Milne Edwards, 1837, the type-species of the genus, was known only from the eastern Pacific; but in the carcinological collection of the Museu de Zoologia da Universidade de São Paulo, a specimen of this species collected at Ubatuba, São Paulo was found; this is the first record of this species for the Brazilian coast. These two species are redescribed and illustrated.

Effects of predation and habitat structure on the abundance and population structure of the rock shrimp Rhynchocinetes typus (Caridea) on temperate rocky reefs

“…Fishes were identified to the species level, the total length (TL) measured to the nearest 0.5 cm, and the stomach removed and placed in a plastic container in a 10 % formalin solution. The number of R. typus present in each stomach was quantified from whole individuals or identified body parts (De Melo 2007 ). In the case of identical paired-appendages found apart from the shrimp body, we assumed the presence of two shrimps when we found more than two identical 3rd maxillipeds or pereopods.…”

Shrimps of the family Rhynchocynetidae (Crustacea: Decapoda: Pleocyemata) of the Red Sea and Gulf of Aden, Indian Ocean

“…All currently known species of the family can be divided into the Atlantic and Indo-West Pacific groups, and separately -the only amphi-American species R. typus H. Milne Edwards, 1837 [Melo, 2007], which lives off the coasts of Brazil and Chile. Cinetorhynchus rigens is distributed in the Atlantic Ocean, on coastal island waters, such as Bermuda, the Bahamas, the Azores, the Virgin Islands, Madeira, Cape Verde, Ascension, St. Helena.…”

“…Cinetorhynchus rigens is distributed in the Atlantic Ocean, on coastal island waters, such as Bermuda, the Bahamas, the Azores, the Virgin Islands, Madeira, Cape Verde, Ascension, St. Helena. It is also found off the coast of Florida (USA), Pernambuco (Brazil) [Melo, 2007;Paiva et al, 2007;De Grave et al, 2019]. Another species, Cinetorhynchus manningi Okuno 1996, was found in the waters of the Virgin Islands [Okuno, 1996].…”