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Achelia assimilis, Sea spiders

Common name (e.g. turtle)

Genus + Species (e.g. Caretta caretta)

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        Ammotheidae
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Achelia assimilis   (Haswell, 1885)

Sea spiders

Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Achelia assimilis  AquaMaps  Data sources: GBIF OBIS
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No photo available for this species.
No drawings available for Ammotheidae.

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

Pycnogonida | Pantopoda | Ammotheidae

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

Reef-associated; depth range 0 - 910 m (Ref. 9).  Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-Pacific and Southwest Atlantic. Tropical to temperate.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 0.1 cm TRKL male/unsexed; (Ref. 1666)

Short description Morphology

Trunk: suture lines complete, partial or lacking. 2 or more dorsomedian tubercles on trunk with or without similar tubercles on abdomen. Lateral processes: broad, more or less contiguous, with distal tubercles which differs in size and number. Proboscis: a slender ovoid as long as trunk. Chelifores: 2-segmented, scape longer than usual, with short dorsodistal tubercles or without. Chelae: tiny nubs, atrophied in adults. Palps: 8 segmented. Ovigers: 10 segmented, smaller in females, armed with 1-2 denticulate spines per distal 3 segments. Legs: slender, with or without low to tall tubercles, mostly dorsal if present. Male femur with 1 dorsodistal cement gland pore. Propodus: well curved, with 3-4 larger heel spines, 7-8 smaller sole spines, robust claw and stout auxiliaries of varying lengths (Ref. 9).

Biology     Glossary (e.g. epibenthic)

Among intertidal tufts of Cladophora prolifera; in coral reefs (Ref. 1666), until to a depth of at least 250 m (Ref. 92910). Inhabits hydrozoan trees, stones, dead corals and red algae (Ref. 92908).

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. (Ref. 9)

IUCN Red List Status (Ref. 130435: Version 2024-2)

  Not Evaluated 

CITES status (Ref. 108899)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses


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Ecology
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Length-length rel.
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References

Internet sources

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

Preferred temperature (Ref. 115969): 4.8 - 21.1, mean 12.5 (based on 1241 cells).
Vulnerability (Ref. 71543): Low vulnerability (10 of 100).
Price category (Ref. 80766): Unknown.

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