Cilunculus sewelli

Cilunculus sewelli   Calman, 1938


Native range | All suitable habitat | Point map | Year 2050
This map was computer-generated and has not yet been reviewed.
Cilunculus sewelli  AquaMaps  Data sources: GBIF OBIS
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Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Pycnogonida | Pantopoda | Ammotheidae

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

Bathypelagic; depth range 183 - 1789 m (Ref. 9).  Subtropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Southeast Atlantic and Indo-West Pacific.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm

Short description Morphology

Trunk: fully segmented with long neck and closely spaced lateral processes. Tall dorsomedian trunk tubercles have 2 to 3 long lateral setae, ocular tubercle at extreme anterior of segment is tall slender cone without eyes, with pair of long setae flanking posterior base. Anterior of cephalic segment flaring, with low tubercles each having short seta which match dorsodistal rims of lateral processes. Some short setae on anterior and posterior of each lateral process. Proboscis: large, ovoid, without constrictions. Abdomen: moderately long, distally swollen, bearing 2 to short dorsal setae. Chelifores: very short, scapes 2 segmented, first segment extremely short, hidden by cephalic segment hood, both armed with several long setae. Chelae: atrophied, tiny slender cones with lateral stub representing movable finger. Palps: typical, 9 segmented. Ovigers: Ammothella-like, with non-functioning strigilis having 2 to 3 slender denticulate spines. Terminal: segment not longer than wide. Legs: long, slender, with many long lateral and dorsal setae. Propodus: slender, well curved, with 3 larger heel spines and many smaller sole spines. Claw: quite long, strongly curved, auxiliaries very short. Male cement gland tube: not within conical tubercle, situated at about 0.6 length of femur dorsum, angled distally (Ref. 9).

Biology     Glossary (e.g. epibenthic)

Depth based on occurrence record; to be replaced with better reference.

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

Human uses


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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): 5.1 - 11.8, mean 7.9 (based on 332 cells).
Price category (Ref. 80766): Unknown.

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