Ammothea acheliata

Ammothea acheliata   Child, 1998

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Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Pycnogonida | Pantopoda | Ammotheidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthic; depth range 0 - 70 m (Ref. 9).  Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Southwest Pacific: Off Norfolk Island.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 0.1 cm LS male/unsexed; (Ref. 9)

Short description Morphology

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).

Biology     Glossary (e.g. epibenthic)

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.

Main reference References | Coordinator | Collaborators

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. (Ref. 9)

IUCN Red List Status (Ref. 130435: Version 2025-1)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless

Human uses


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BHL | BOLD Systems | CISTI | DiscoverLife | FAO(Publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates based on models

Fishing Vulnerability (Ref. 71543): Low vulnerability (10 of 100).
Price category (Ref. 80766): Unknown.

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