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A new deep water species of Odontozona Holthuis (Decapoda, Stenopodidae) from the southern Gulf of California, Mexico

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Odontozona foresti, a new deep water species of Stenopodidae is described from the southern Gulf of California, Mexico. The holotype, an ovigerous female, was collected with a benthic sledge at 1240-1270 m depth. The new species, the largest currently known for this genus (total length, 60.6 mm), is distinguished from other species of Odontozona by the lack of dorsal spines on the telson, the presence of long, anteriorly directed horizontal spines on the posterior margin of both cervical and postcervical grooves, and the absence of spines on the carapace behind these grooves. Unlike most species of the genus, the propodus and carpus of the fourth pereiopod are undivided, while these segments are divided into 2 indistinct segments in the fifth pereiopod. The armature of the carapace resembles that of O . spongicola but in O . foresti the carapace is not swollen and the postcervical groove extends to about midheight of the lateral face of the carapace.

Odontozona foresti, une nouvelle espèce de Stenopodidae d'eaux profondes, est décrite du sud du golfe de Californie, Mexique. L'holotype, une femelle ovigère, a été récoltée à l'aide d'une drague benthique à 1240-1270 m de profondeur. L'espèce nouvelle, la plus grande connue de ce genre de Stenopodidae (longueur totale: 60,6 mm) se distingue des autres espèces de Odontozona par l'absence d'épines dorsales sur le telson, la présence, sur les bords postérieurs des deux sillons cervicaux, de longues épines horizontales, dirigées vers l'avant et par l'absence d'épines sur la carapace à l'arrière de ces sillons. Contrairement à la plupart des espèces de Odontozona , le propode et le carpe des quatrièmes péréiopodes ne sont pas divisés tandis qu'ils sont divisés en deux segments indistincts sur le cinquième péréiopode. L'armature de la carapace ressemble à celle de O. spongicola, mais chez O. foresti, la carapace n'est pas dilatée et le sillon postcervical s'étend seulement jusqu'à mi-hauteur de la face latérale de la carapace.


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