| 词条 | Geryon trispinosus |
| 释义 |
| name = Geryon trispinosus | image = Geryon trispinosus.jpg | regnum = Animalia | phylum = Arthropoda | subphylum = Crustacea | classis = Malacostraca | ordo = Decapoda | infraordo = Brachyura | familia = Geryonidae | genus = Geryon | species = G. trispinosus | binomial = Geryon trispinosus | binomial_authority = (Herbst, 1803) | synonyms =
}} Geryon trispinosus is a species of crab that lives in deep water in the north-eastern Atlantic Ocean. DescriptionGeryon trispinosus is a small crab, reaching a carapace length of up to {{convert|40|mm}}.[2] The carapace is roughly hexagonal in shape, and reddish brown in colour. It is broader than it is long, with three conspicuous teeth on either side at the front.[2] The pereiopods are paler than the carapace; they are quite narrow and long, with the third and fourth pairs being the longest.[2]DistributionGeryon trispinosus is found in the north-eastern Atlantic Ocean. Its range extends from Norway in the north to the Bay of Biscay in the south,[3] and also includes the Canary Islands.[4]Life cycle and ecologyFemales reach sexual maturity at a carapace length of {{convert|12|-|15|mm|abbr=on|1}}, while males reach it at {{convert|35|mm|abbr=on}}.[7] Eggs are laid in April,[2] and the eggs hatch into planktonic larvae, which eventually settle as juveniles at depths greater than {{convert|1000|m}}. As they grow, these crabs migrate upwards, with the adults only found at depths of less than {{convert|800|m|abbr=on}}. Due to the shallow slopes in the north-eastern Atlantic, these migrations involve distances of {{convert|20|-|50|km}}.[5] G. trispinosus occurs in the same localities as the squat lobster Munida sarsi. M. sarsi lives abundantly at depths of {{convert|700|-|800|m}}, and out-competes young G. trispinosus, and limits their survival to those depths where it is absent. Another squat lobster, M. tenuimana, lives at greater depths, but in much lower numbers, and therefore does not impact the survival of G. trispinosus as severely.[5]TaxonomyGeryon trispinosus was first described in 1803 by Johann Friedrich Wilhelm Herbst, as "Cancer trispinosus", although he described the locality erroneously as the East Indies. In 1837, Henrik Nikolai Krøyer erected the genus Geryon, setting "Geryon tridens" as the type species. This was later synonymised with Herbst's species.[6] In 1989, Raymond B. Manning and Lipke Holthuis erected a new genus, Chaceon, to accommodate most of the species previously in Geryon, which was left with only two species, G. trispinosus and G. longipes from the Mediterranean Sea.[7]References1. ^{{cite journal |author=International Commission on Zoological Nomenclature |year=1964 |title=Opinion 712. Forty-seven genera of decapod Crustacea: placed on the Official List |journal=Bulletin of Zoological Nomenclature |volume=21 |issue=5 |pages=336–351 |url=http://biostor.org/reference/4599}} {{Taxonbar|from=Q3934227}}2. ^1 2 3 {{cite web |url=http://species-identification.org/species.php?species_group=crustacea&id=186 |title=Geryon tridens |work=Macrobenthos of the North Sea – Crustacea |publisher=Marine Species Identification Portal |accessdate=June 14, 2012 |author1=Mario de Kluijver |author2=Sarita Ingalsuo }} 3. ^{{cite journal |author1=M. J. Attrill |author2=R. G. Hartnoll |author3=A. L. Rice |year=1991 |title=Aspects of the biology of the deep-sea crab Geryon trispinosus from the Porcupine Seabight |journal=Journal of the Marine Biological Association of the United Kingdom |volume=7 |issue=2 |pages=311–328 |doi=10.1017/S0025315400051626}} 4. ^{{cite journal |author1=J. A. Gonzalez |author2=J. I. Santana |author3=V. Fernandez-Vergaz |year=1996 |title=The family Geryonidae (Decapoda, Brachyura) in the Canary Islands |journal=Crustaceana |volume=69 |issue=5 |pages=627–635 |doi=10.1163/156854096X00637}} 5. ^1 2 {{cite journal |author1=M. J. Attrill |author2=R. G. Hartnoll |author3=A. L. Rice |author4=M. H. Thurston |year=1990 |title=A depth-related distribution of the red crab, Geryon trispinosus (Herbst) [= G. tridens Krøyer]: indications of vertical migration |journal=Progress In Oceanography |volume=24 |issue=1–4 |pages=197–206 |doi=10.1016/0079-6611(90)90030-6 |bibcode=1990PrOce..24..197A}} 6. ^{{cite journal |author=Raymond B. Manning & L. B. Holthuis |year=1987 |title=The status of Geryon trispinosus (Herbst) (Geryonidae) |journal=Investigación Pesquera |location=Barcelona |volume=51 |issue=suppl. 1 |pages=57–62 |url=http://www.icm.csic.es/scimar/index.php/secId/8/IdArt/3603/}} 7. ^{{cite journal |author=Raymond B. Manning & L. B. Holthuis |year=1989 |title=Two new genera and nine new species of geryonid crabs (Crustacea, Decapoda, Geryonidae) |journal=Proceedings of the Biological Society of Washington |volume=102 |issue=1 |pages=50–77 |url=http://decapoda.nhm.org/pdfs/10652/10652.pdf |format=PDF}} 3 : Portunoidea|Crustaceans of the Atlantic Ocean|Crustaceans described in 1803 |
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