Pycnogonida |
Pantopoda |
Ammotheidae
Environment: milieu / climate zone / Mức độ sâu / distribution range
Sinh thái học
. Tropical
Western Central Pacific: Philippines.
Length at first maturity / Bộ gần gũi / Weight / Age
Chín muồi sinh dục: Lm ? range ? - ? cm
Small. Leg span: less than 10 mm. Trunk: completely segmented; compact, robust, lateral processes close to each other; short, armed dorsodistally with two or three low, slender tubercles, bifurcate at tips. Cephalic segment: broad, flaring laterally at anterior, margins without tubercle or setae. Ocular tubercle: situated at anterior of segment, only taller than maximum diameter, with two apical low conical tubercles. Eyes: large well pigmented. Abdomen: long, bent posteriorly, with dorsodistal field of two feathered spines, one clubbed hollow spine, and four short lateral setae. Proboscis: massive, a very inflated oval, compressed at lips. Chelifores of three segments, scape second segment slightly longer than first, armed with three tubular clubbed spines and five long feathered spines on distal segment, and one long feathered spine on proximal segment. Chelae fingers: complete, well curved, toothless, with single long feathered spine. Palps: 9 segments. Ovigers: small U-shaped unsegmented tubercles in juvenile. Legs: with long feathered spines; 4 on first coxae, two on second, none on third, six dorsodistally on femur, seven dorsally and laterally on first tibiae, two dorsally on second tibiae, and five dorsally on propodi, with long tubular clubbed spines singly or in pairs dorsally on the major leg segments. Second tibia the longest segment with first tibia and femur increasingly shorter. Cement gland undeveloped. Propodus with 3 large heel spines and several shorter sole spines. Claw less than half propodal length with auxiliaries about 0.7 main claw length (Ref. 6).
Life cycle and mating behavior
Chín muồi sinh dục | Sự tái sinh sản | Đẻ trứng | Eggs | Sự sinh sản | 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. 1988 Pycnogonida of the Western Pacific Islands, III: Recent Smithsonian-Philippine Expeditions. Smithsonian Contribution to Zoology No. 468. Smithsonian Instition Press. Washington, DC. 32 p. + Figure 1 -3. (Tài liệu tham khảo 6)
IUCN Red List Status
(Tài liệu tham khảo 130435: Version 2025-1)
CITES status (Tài liệu tham khảo 108899)
Not Evaluated
CMS (Tài liệu tham khảo 116361)
Not Evaluated
Threat to humans
Human uses
| FishSource |
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Sinh thái dinh dưỡngFood items (preys)
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Population dynamicsSự sinh trưởng
Max. ages / sizes
Length-weight rel.
Length-length rel.
Length-frequencies
Mass conversion
Sự phong phú
Life cycleSự tái sinh sảnChín muồi sinh dụcSự sinh sảnĐẻ trứngEggsEgg developmentLarvae PhysiologyThành phần ô-xy
Human RelatedStamps, coins, misc.
Các nguồn internet
Estimates based on models
Price category
Unknown.
