Malacostraca |
Decapoda |
Geryonidae
Environment: milieu / climate zone / ระดับความลึก / distribution range
นิเวศวิทยา
; ระดับความลึก 601 - 1228 m (อ้างอิง 105069). Subtropical; 21°S - 35°S, 52°W - 39°W (อ้างอิง 105421)
Southwest Atlantic: Brazil, from Rio de Janeiro to Rio Grande do Sul.
Length at first maturity / ขนาด / Weight / Age
วัยเจริญพันธุ์: Lm ? range ? - ? cm Max length : 15.8 cm CW เพศผู้/กระเทย; (อ้างอิง 105069)
A large Chaceon, CL to 143 mm, CW to 158 mm in adults, with 5 anterolateral teeth on the carapace and dorsoventrally depressed dactyli on the walking legs. Carapace 1.1 to 1.2 times broader than long. Median pair of frontal teeth separated by U-shaped sinus. Distance between submedian frontal teeth less than distance between them and lateral frontal teeth. Second, third, and fourth anterolateral teeth obsolete in adults, second and fourth smallest of all; distance from first to third tooth less than that from third to fifth tooth. Carapace with distinct raised ridge mesial to fifth anterolateral tooth, carapace surface finely granular, especially posterolaterally, smooth only at hepatic regions. Suborbital tooth short and broad in adults, not extending to level of lateral frontal teeth. Cheliped merus with sharp tooth subdistally, lacking distal tooth or angled lobe; carpus roughened dorsally, usually with irregular, curved granular ridge extending from middle of proximal margin to inner spine, anterior margin of carpus with at most an angled lobe but no spine; propodus with at most distal angled projection dorsally. Meri of walking legs with at most indistinct distal, dorsal tooth. Dactyli of walking legs depressed, height at midlength less than width. Fifth leg: merus usually less than 5.0 times (range 4.6-4.9 in adults, 6.4 in juvenile male) times longer than high, length 0.65 to 0.66 cb in adult; carpus with line of sharp granules dorsally; propodus length 4.1 to 4.3 times height in adult, 5.1 times height in juvenile, longer than dactylus.
Deep-water species (Ref. 105069). Epibenthonic. Found on muddy and muddy-sandy bottoms. Scavenger and predator; likely to be an opportunistic carnivore (Ref. 104380).
Life cycle and mating behavior
วัยเจริญพันธุ์ | การสืบพันธุ์ | การวางไข่ | Eggs | ความดกของไข่ | Larvae
Manning, R.B., M.S. Tavares and E.F. Albuquerque 1989 Chaceon ramosae, a new deep-water crab from Brazil (Crustacea: Decapoda: Geryonidae). Proc. Biol. Soc. Wash 102(3):646-650. (อ้างอิง 105069)
IUCN Red List Status
(อ้างอิง 130435: Version 2025-1)
CITES status (อ้างอิง 108899)
Not Evaluated
CMS (อ้างอิง 116361)
Not Evaluated
Threat to humans
Harmless
Human uses
การประมง: การค้า
| FishSource |
เครื่องมือ
ข้อมูลเพิ่มเติม
Population dynamicsการเจริญเติบโต
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
อุดมสมบรูณ์
Life cycleการสืบพันธุ์
วัยเจริญพันธุ์
ความดกของไข่
การวางไข่
Eggs
Egg development
Larvae
Human RelatedStamps, coins, misc.
แหล่งที่มาจากอินเตอร์เน็ต
Estimates based on models
Fishing Vulnerability
Low vulnerability (10 of 100).
