Pycnogonida |
Pantopoda |
Ammotheidae
Environment: milieu / climate zone / depth range / distribution range
Ecology
Benthic. Tropical
Pacific and Arctic Oceans: Alaska, Japan and USA.
Length at first maturity / Size / Weight / Age
Maturity: Lm ? range ? - ? cm Max length : 0.2 cm TRKL male/unsexed; (Ref. 2153)
Tiny species, trunk only about 2 mm long, circular in dorsal aspect, lateral processes contiguous with cephalic segment extending slightly beyond circle, ocular tubercle a low cone. Proboscis long, tapering to rounded mouth. Chelifore scapes short, chelae atrophied. Palps very short, 7-segmented. Legs short, robust, with heavily setose integument, femora inflated, larger in females than males. Male second coxae with ventrodistal sexual spur and femora with dorsodistal tubercle. Ovigers and terminal leg segments typical for genus (Ref. 2153, p. 14).
Shelf (Ref. 19). Recorded from many octocoral species (Ref. 121217).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Members of the class Pycnogonida are gonochoric and sexually dimorphic. During copulation, male usually suspends itself beneath the female. Fertilization occurs as the eggs leave the female's ovigers. Males brood the egg masses until they hatch. Life cycle: Eggs hatch into protonymphon larva then to adults.
Child, C.A. 1996 The Pycnogonida types of William A. Hilton. II. The remaining undescribed species. Proceedings of the Biological Society of Washington 109(4):677-686. (Ref. 2117)
IUCN Red List Status
(Ref. 130435: Version 2025-1)
CITES status (Ref. 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
| FishSource |
Tools
More information
Trophic EcologyFood items (preys)
Diet composition
Food consumption
Predators
Population dynamicsGrowth
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Abundance
Life cycleReproductionMaturityFecunditySpawningEggsEgg developmentLarvae PhysiologyOxygen consumption
Human RelatedStamps, coins, misc.
Internet sources
Estimates based on models
Fishing Vulnerability
Low vulnerability (10 of 100).
Price category
Unknown.
