On two species of Periclimenaeus Borradaile, 1915 (Caridea: Palaemonidae) from colonial tunicates in the southwestern Atlantic

Abstract

Two species of the palaemonid genus Periclimenaeus Borradaile, 1915, P. ascidiarum Holthuis, 1951 and P. maxillulidens (Schmitt, 1936, are reported from the offshore Escalvada Island, Espírito Santo, Brazil. The location represents a new southernmost record for these species in the western Atlantic. Both species were found inside an undescribed tunicate species of Diplosoma, dwelling inside the circulatory channels, among the zooid clusters. Although P. ascidiarum is known to occur in tunicates, the finding of the rare P. maxillulidens inside an ascidian host represents the first record of this association. Illustrations for both species and a taxonomic key for the southwestern Atlantic Periclimenaeus are provided based on the present material and literature records.

The marine palaemonid shrimps (Crustacea, Deapoda, Caridea) of the Dutch Caribbean

“…Remarks. The morphological characters of the present two small specimens agree well with the original description by Schmitt (1936) and the descriptions by Holthuis (1951b) and Ferreira et al (2020). Rostrum (Fig.…”

“…10-15, video Remarks. The morphological characters of the present specimens agree very well with the original description of Holthuis (1951b) and diagnosis in Ferreira et al (2020). Rostrum with three dorsal teeth, without ventral teeth, distally upturned, overreaching cornea and basal segment of antennular peduncle (figs.…”

“…Ecology. Its host was unknow until Ferreira et al (2020) recorded the species inside an ascidian of the genus Diplosoma, which is here confirmed.…”

“…Distribution. Known from Florida and Colombia (Holthuis 1951b), Dominica (Chace 1972), Cuba (Martínez-Iglesias 1986), Caribbean coast of Panama (Pachelle et al 2018), Los Roques (Rodriguez 1986) to Brazil (Vieira et al 2012, Ferreira et al 2020) in depths of 1-73 m. This is the first record of the species for Bonaire. Remarks.…”

“…Ecology. Known as an endosymbiont, living in the cloacal cavity of unidentified compound ascidians (Holthuis, 1951b) and a compound ascidian of the genus Diplosoma (Ferreira et al 2020).…”