Pycnogonida |
Pantopoda |
Ammotheidae
Environment: milieu / climate zone / Mức độ sâu / distribution range
Sinh thái học
; Mức độ sâu 0 - 70 m (Tài liệu tham khảo 9). Subtropical
Southwest Pacific: Off Norfolk Island.
Length at first maturity / Bộ gần gũi / Weight / Age
Chín muồi sinh dục: Lm ? range ? - ? cm Max length : 0.1 cm LS con đực/không giới tính; (Tài liệu tham khảo 9)
Small species with leg span of only about 0.14 cm. Trunk segmented, without large cowls or dorsomedian tubercles at posterior segmentation lines. Lateral processes like the size of their diameters, separated by less than their diameters, armed with 1 - 3 short dorsodistal or dorsal spines. Ocular tubercle low, shorter than basal diameter, eyes large, prominent, darkly pigmented. Abdomen short, blunt, without distal extension or rounded tubercle, not as long as fourth lateral processes, armed with 3 - 4 short distal spines. Proboscis ovoid, longer than trunk width, about half trunk length, without constrictions. Chelifores entirely lacking. Palps 9 segmented, fourth segment longest, longer than second, first and third short, sub equal. Distal 4 short segments carried anaxially on curved fifth segment, hook-shaped, without ventral extensions or tubercles, moderately setose ventrally and distally. Most setae as long as segment diameters. Oviger 10 segmented, third segment shorter than fourth or fifth which are sub equal in length. Sixth segment with many short spines, seventh placed anaxially on sixth, with lateral apophysis bearing 5 - 6 long spines. Eighth, ninth, and tenth segments each smaller than last, armed with small denticulate spines in formula 1: 1: 2, each with many lateral denticles. Legs long and slender, armed with very few short setae or spines except distal segments. Second tibiae the longest segments. Femoral cement gland small, opening a single small dorsodistal pore at about 0.75 femoral length. Tarsus short, without heel spines. Propodi homogenous in anterior posterior members, short, well curved, sole with three major heel spines, one or two slightly smaller proximal heel spines, and 6 - 7 small sole spines. Claw robust, short, well curved distally, auxiliary claws long, about 0.6 main claw length. Female characters unknown (Ref. 9).
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. 1998 The marine fauna of New Zealand: Pycnogonida (sea spiders). NIWA Biodiversity Memoire 109. National Institute of Water and Atmospheric Research (NIWA). Washington, D.C. 20530, USA. 71 p. + Figure 2A-G, 3A-F, 4, 5. (Tài liệu tham khảo 9)
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
Harmless
Human uses
| FishSource |
Các công cụ
Thêm thông tin
Sinh thái dinh dưỡngFood items (preys)
Thành phần thức ăn
Thành phần thức ăn
Các động vật ăn mồi
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
Fishing Vulnerability
Low vulnerability (10 of 100).
Price category
Unknown.
