Nephropsis
Nephropsis rosea
Nephropsis is a meeresbewohnende genus of decapods ( Decapoda ) from the family of lobster -like ( Nephropidae ). Today it includes 15 species that are distributed in the Atlantic, Pacific and Indian Ocean.
Description
In Nephropsis the rostrum is hairy straight and at its lateral edges. It has no or one or two pairs of obliquely forwardly directed lateral spines, but always no ventral spines. Starting from the rostrum run two ridges sometimes spiked dorsal side up on the front of the carapace. Behind the rostrum there is a distinct tubercle ( gastric tubercle ).
Thus, the first of the abdomen is smooth and without burr in the remaining somites can each have a median ridge may be present. The pleura, the lateral resolutions of the somites, are almost triangular in shape and do not overlap. The telson is elongate rectangular and has at the trailing edges directed towards small side ( posterolateral ) peaks.
The non-pigmented eyes are small, and the shaft is relatively short. The flagella of the first antenna pair are shorter than the carapace, the said second pair are longer than the total length of the body. The antenna base ( antennal peduncle ) has no Exopoditen ( Scaphocerite ).
The claws on the first pair of walking legs are equal, can be hairy and sometimes have small thorns. The pointed scissors fingers are bent and cross over. They are about the same length as the scissors hand. The second and third pair of walking legs is hairy on the small scissor long. On the fourth and fifth pair are no scissors. In males the coxa of the third walking leg have a mostly tipped extension.
The first pair of swimming legs of the males is hardened, that of the female is soft and flexible. The uropods are broad and strong, both endo-and exopodite have at their lateral edge a bit. A diaeresis, a transverse depression at Expoditen the uropods may be present or absent.
The total length of the body Nephropsis species may be from 2 cm to 15 cm.
Dissemination
The types of Nephropsis are widespread in the Indo-Pacific, the eastern and western Atlantic and the eastern Pacific at depths of 180 m to 1800 m.
Systematics and Taxonomy
The genus consists of the following Nephropsis, tart known species:
- Nephropsis acanthura Macpherson, 1990
- Nephropsis aculeata Smith, 1881
- Nephropsis agassizii A. Milne -Edwards, 1880
- Nephropsis atlantica Norman, 1882
- Nephropsis carpenteri Wood - Mason, 1885
- Nephropsis ensirostris Alcock, 1901
- Nephropsis holthuisii Macpherson, 1993
- Nephropsis malhaensis Borradaile, 1910
- Nephropsis neglecta Holthuis, 1974
- Nephropsis occidentalis Faxon, 1893
- Nephropsis rosea Bate, 1888
- Nephropsis serrata Macpherson, 1993
- Nephropsis stewarti Wood - Mason, 1872
- Nephropsis suhmi Bate, 1888
- Nephropsis sulcata Macpherson, 1990
Fossil is known another way. Nephropsis is used within the lobster -like with the genus Metanephrops closer. The inclusion of this genus together with Nephropides, Thymops and Thymopsis in the subfamily Thymopinae Holthuis, 1974 is obsolete and is not supported by results of a phylogenetic study.
James Wood - Mason caught a female individual of Nephropsis stewarti in the Andamans from a depth of 260-300 thread (equivalent to 468 m and 540 m) and described on the basis of this type species, the genus Nephropsis. The suffix '- opsis ' means literally ' appearance of', the genus name refers therefore to the morphological similarities with Nephrops.