Decapoda - Anomura - Chirostylidae - Uroptychus

Uroptychus nitidus (A. Milne Edwards, 1880) variety B, Chace, 1942



World Distribution
Cuba, 250-400 fathoms (457-732 m) (Chace, 1942). Also Lesser Antilles, ICA (Guadeloupe to 828 m) from this database.
Baba & Wicksten (2016, in prep. Zootaxa) - East of St. Augustine (Florida), north coast of Cuba, northern and southeastern Gulf of Mexico, southern Caribbean, and Brazil off São Paulo, Paraná and Santa Catarina; 458–808 m

Environnement : Marine - Substrat/Association : Associated with corals (obligate)

Vertical range : Deep (more than 100 m) - Min-Max observed: 457-828 m

Lesser Antilles data
Distribution: Cuba, 250-400 fathoms (Chace, 1942). Lesser Antilles, ICA (Guadeloupe). 457-828 m. WA
Uroptychus nitidus variety B: Chace, 1942 - Guadeloupe (first record for Lesser Antilles), Karubenthos II 2015, field det. J. Poupin/K. Baba [Following Chace, 1942: 10, key, with rostrum distinctly longer than eyes; check on sp. that lateral margin of carapace are -obscurely dentate-], st. DW4510, 7 June 2015, 16°15.1'N, 61°51.3'W, 660-690 m, MNHN-IU-2013-18859 [large cornea, brown]; st. CP4618, 25 June 2015, 16°22.74'N, 60°45.86'W, 780-828 m, MNHN-IU-2013-19095 [large cornea, brown].
Uroptychus nitidus sp. nov. 2 Baba & Wicksten, 2016: in press, Guadeloupe [from Karubenthos 2015].
Comment: see under U. nitidus variety A. Maximum depth for this variety is extended from 732 to 780-828 m.

Comment(s) on data
Comment K. Baba, mail 15/09/2015 - and Mary Wicksten have been revising the Uroptychus nitidus complex. Examining numerous specimens including the syntypes in the collection of the Museum of Comparative Zoology at Harvard, we have come to the conclusion that Uroptychus nitidus typical form of Chace (1942) should be the true U. nitidus; Uroptychus nitidus variety A of Chace is a new species (U. fenneri n. sp. in our manuscript) and your photo 2 will be this species (please confirm that the antennal scale exceeds the antennal peduncle); U. nitidus variety B of Chace is also a new species (U. janiceae n. sp. in our ms), and your photo 1 specimen will be this species, which is characterized by having long pereopod 1 fingers; U. nitidus variety C of Chace is another new species. Part of the syntypes of U. nitidus that Chace (1942) identified as U. uncifer is different from U. uncifer, representing an undescribed species. In addition, we have additional two new species, both resemble U. nitidus.

May I suggest that the tentative naming of yours be:
Photo 1 specimen (large cornea, brown) = Uroptychus nitidus variety B of Chace (1942) [U. janiceae n. sp., Baba & Wicksten, MS]
Photo 2 specimen (small cornea, yellow-light brown) = Uroptychus nitidus variety A of Chace (1942) [U. fenneri n. sp., Baba & Wicksten, MS]

References : PDF list, 214 pp (1.4 Mo)

This species in Worms Database