Further Indo‐West Pacific palaemonoid shrimps (Crustacea: Decapoda: Palaemonoidea), principally from the New Caledonian region

Abstract

Based on the material deposited in the Muséum national d'Histoire naturelle, Paris, collected from the Indo-West Pacific, principally from the New Caledonian region, the present paper reports 117 palaemonoid shrimp species, which belong, respectively, to Anchistioididae (one genus, one species), Gnathophyllidae (one genus, one species), Palaemonidae Palaemoninae (seven genera, nine species), and Palaemonidae Pontoniinae (30 genera, 106 species), including eight new species. The new species are all Pontoniinae: Mesopontonia brevicarpalis sp. nov., Palaemonella komaii sp. nov., Periclimenes crosnieri sp. nov., Periclimenes forgesi sp. nov., Periclimenes loyautensis sp. nov., Periclimenes paralcocki sp. nov., Periclimenes paraleator sp. nov., and Periclimenes pseudalcocki sp. nov. The last six new species are members of the deep-water ''Periclimenes alcocki species complex'', which has more than two (usually four) pairs of dorsolateral telson spines anterior to the posterior telson margin, the cornea is usually reduced, the dactyl of the major second chela is generally flanged and the chela is sometimes covered with small tubercles. The complex is usually found at more than 200 m depth in the West Pacific. The species can be distinguished from each other by the armature of ambulatory propod and dactyl, diameter of cornea, rostrum shape and the number of pairs of dorsolateral telson spines. Mesopontonia brevicarpalis sp. nov., from the southeast coast of Africa, is the seventh species of the genus. Palaemonella komaii sp. nov. is very similar to Palaemonella dolichodactylus Bruce, 1991 and Palaemonella hachijo Okuno, 1999. These three species share the features of very long and slender ambulatory pereiopods with the dactyl more than eight times longer than its basal depth and with several long setae on the dorsal dactylar margin. RésuméBasé sur le matériel déposé au Muséum national d'Histoire naturelle, à Paris, récolté dans l'Indoouest Pacifique, principalement dans la région néo-calédonienne, la présente étude porte sur 117 espèces de crevettes Palaemonoidea appartenant respectivement aux familles Anchistioididae (un genre, une espèce), Gnathophyllidae (un genre, une espèce), et Palaemonidae (37 genres et 115 espèces). Chez les Palaemonidae sept genres et neuf espèces appartiennent à la sous-famille Palaemoninae et 30 genres et 106 espèces, donc huit nouvelles, à la sous-famille Pontoniinae. Les espèces sont: Mesopontonia brevicarpalis sp. nov., Palaemonella komaii sp. nov., Periclimenes crosnieri sp. nov., Periclimenes forgesi sp. nov., Periclimenes loyautensis sp. nov., Periclimenes paralcocki sp. nov., Periclimenes paraleator sp. nov, Periclimenes pseudalcocki sp. nov. Les six dernières appartiennent à ce que l'on peut appeler ''le complexe Periclimenes alcocki'' donc les espèces ont un telson portant, en avant de son bord postérieur, plus de deux (habituellement quatre) paires d'épines dorsolatérales, une cornée habituellement réduite, la plus grande des pinces des deuxièmes péréiopodes partois couvert...

Designation of a new genus Bathymenes for the deep-sea pontoniine shrimps of the ‘Periclimenes alcocki species group’ (Decapoda, Caridea, Palaemonidae), with a checklist of the species assigned to the genus

“…Synonymy: Periclimenes paralcocki Li and Bruce, 2006: 707-710, fi g. 27;Li, 2008: 230-231, fi g. 15;Bruce, 2008a: 12-14 Bruce, 1989) Bathymenes pseudalcocki (Li and Bruce, 2006) comb. nov.…”

“…Periclimenes albatrossae Chace and Bruce, 1993 Periclimenes alcocki Kemp, 1922 Periclimenes aleator Bruce, 1991 Periclimenes brevirostris Bruce, 1991 Periclimenes forgesi Li and Bruce, 2006 Periclimenes loyautensis Li and Bruce, 2006 Periclimenes manihine Bruce, 2006 Periclimenes ngi Li et al, 2008 Periclimenes panglaonis Li et al, 2008 Periclimenes paralcocki Li and Bruce, 2006 Periclimenes paraleator Li and Bruce, 2006 Periclimenes poupini Bruce, 1989 Periclimenes pseudalcocki Li and Bruce, 2006 Periclimenes takedai Mitsuhashi et al, 2012 Periclimenes tangeroa Bruce, 2005 Etymology . From Greek word bathus meaning deep, and part of the generic name Periclimenes , indicating the deep water habitat of the members of the genus.…”

Designation of a new genus Michaelimenes (Decapoda: Caridea: Palaemonidae), with new host record and range extension of its type species, M. perlucidus (Bruce, 1969)

“…Bruce (1996) described P. involens as a new species on the basis of 1 male and 3 female specimens from the depths of 92-97 m off Mindoro, Philippines. This species has also been recorded from La Réunion, western Indian Ocean by Li and Bruce (2006).…”

“…It has been additionally recorded from the depths of 73-440 m at Somalia, Kenya, Philippines, Indonesia, New Caledonia and Japan (Hayashi, 2005;Li and Bruce, 2006). Kemp (1922) mentioned that the positional relation between the dactylus and fixed finger of the second pereiopod in P. latipollex resembles that of the blades of scissors, and Bruce (1991) illustrated this structure.…”

“…Type locality: Macclesfield Bank, South China Sea, 16°06.5'N 114°38.3'E-16°05.8'N 114°38.2'E, 78.7-80.5 m depth (Bruce, 1969). Also known from Madagascar, La Réunion, Papua New Guinea, Philippines and Japan (Bruce, 1978a(Bruce, , 1996De Grave, 2000;Kato and Okuno, 2001;Li and Bruce, 2006;present study). Bathymetrically known from 20 to 110 m. Boso Peninsula of Japan is the northernmost record in its known range.…”