Blepharipodidae

Blepharipodidae
	Blepharipoda occidentalis
Systematics
Class :	Higher crabs (Malacostraca)
Order :	Decapods (decapoda)
Subordination :	Pleocyemata
Partial order :	Crayfish (anomura)
Superfamily :	Hippoidea
Family :	Blepharipodidae
Scientific name
	Blepharipodidae
	Boyko , 2002

The Blepharipodidae are a family of decapods from the sub-order of the medium- sized crabs (Anomura). It comprises 10 species in two genera, four of which are only known to be fossilized. The more recent species occur on the coasts of the Pacific with one exception.

features

The carapace of this 3 to 7 cm long crustacean is longer than it is wide and broadly keel-shaped. There are three or four forward-facing spines on its sides. The rostrum is triangular and only slightly prickly. The gills are hair-shaped (trichobranchiat). The eye stalks are cylindrical and the cornea rather large. The first pair of antennas, the antennas, have an unreinforced first segment (without thorns). The antenna whip (flagella) consist of 18 to 85 and 6 to 21 members. In the case of the second pair of antennas, the first segment is also unreinforced on the back. The exopodite is rather short. Your flagella consist of 8 to 44 limbs. The proximal and distal endites of the maxilla differ in width. The dactyl of the first pair of striding legs forms a subchela with a prickly cut edge. The dactyli of the second to fourth striding legs are indented on the sides, and there are small spines on the carpi. The fifth pair of striding legs is reduced and chelated. The abdomen has two to five pleura on the somites . Males lack the pleopods . Uropods are always present. The telson is rather egg-shaped and elongated to the side. Telson's sexual dimorphism is either weak or absent.

distribution and habitat

The species of the Blepharipodidae are widespread on the non-tropical coasts of the Pacific. They occur in Russia, China, Korea, California, Mexico, Peru and Chile. Only Blepharipoda doelloi lives in the Atlantic on the coasts of Argentina and Brazil. The four species of the Blepharipodidae known only as fossils come from the Miocene , Oligocene and Eocene . They were found in Washington state .

The habitat of all Blepharipodidae is a sandy to muddy seabed on the coastline to a maximum depth of 70 meters. There they dig themselves backwards into the sand. The main food is probably carrion and detritus .

Systematics and taxonomy

The Blepharipodidae are divided into the following two genera, which can be distinguished by the number of lateral teeth on the carapace and the morphology of the eye stalks:

Blepharipoda Randall, 1840
Lophomastix Benedict, 1904

Within the Hippoidea , the Blepharipodidae are regarded as sister taxons to the molehill crabs ( Albuneidae) and sand crabs (Hippidae) and are themselves monophyletic . The main distinguishing features of the families are the gills, which are hair-shaped (trichobranchiat) in the Blepharipodidae and leaf-shaped (phyllobranchiat) in the Albuneidae and Hippidae.

Christopher Boyko revised the mole crabs (Albuneidae) in 2002 and, as a partial result, removed the genera Blepharipoda and Lophomastix from this family in order to place them in the newly described family of the Blepharipodidae. Type genus is the genus Blepharipoda .

Individual evidence

↑ ^a ^b ^c ^d ^e ^f Christopher B. Boyko: A worldwide revision of the Recent and fossil sand crabs of the Albuneidae Stimpson and Blepharipodidae, new family (Crustacea: Decapoda: Anomura: Hippoidea) . In: Bulletin of the American Museum of Natural History . tape 272 , 2002, pp. 1–396 , doi : 10.1206 / 0003-0090 (2002) 272 <0001: AWROTR> 2.0.CO; 2 .
↑ Torrey Nyborg, Francisco J. Vega: Three New Fossil Species of Lophomastix (Decapoda: Blepharipodidae) from the Cenozoic of Washington . In: Journal of Crustacean Biology . tape 28 , no. 2 , 2008, p. 361-369 , doi : 10.1651 / 0278-0372 (2008) 028 [0361: TNFSOL] 2.0.CO; 2 .
↑ Christopher B. Boyko: Blepharipodidae Boyko, 2002. In: World Register of Marine Species. Retrieved July 1, 2013 .
↑ Christopher B. Boyko, Patsy A. McLaughlin: Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part IV - Hippoidea . In: The Raffles Bulletin of Zoology . Supplement No. 23, 2010, p. 139–151 ( PDF, 296kB [accessed July 1, 2013]).

Web links

Commons : Blepharipodidae - Collection of images, videos and audio files

[Boyko-1] ↑ ^a ^b ^c ^d ^e ^f Christopher B. Boyko: A worldwide revision of the Recent and fossil sand crabs of the Albuneidae Stimpson and Blepharipodidae, new family (Crustacea: Decapoda: Anomura: Hippoidea) . In: Bulletin of the American Museum of Natural History . tape 272 , 2002, pp. 1–396 , doi : 10.1206 / 0003-0090 (2002) 272 <0001: AWROTR> 2.0.CO; 2 .

[Nyborg-2] Torrey Nyborg, Francisco J. Vega: Three New Fossil Species of Lophomastix (Decapoda: Blepharipodidae) from the Cenozoic of Washington . In: Journal of Crustacean Biology . tape 28 , no. 2 , 2008, p. 361-369 , doi : 10.1651 / 0278-0372 (2008) 028 [0361: TNFSOL] 2.0.CO; 2 .

[Worms-3] Christopher B. Boyko: Blepharipodidae Boyko, 2002. In: World Register of Marine Species. Retrieved July 1, 2013 .

[BoykoMcL-4] Christopher B. Boyko, Patsy A. McLaughlin: Annotated checklist of anomuran decapod crustaceans of the world (exclusive of the Kiwaoidea and families Chirostylidae and Galatheidae of the Galatheoidea) Part IV - Hippoidea . In: The Raffles Bulletin of Zoology . Supplement No. 23, 2010, p. 139–151 ( PDF, 296kB [accessed July 1, 2013]).