BIOTIC Species Information for Anoplodactylus spp.
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| Researched by | Sean Lindsley-Leake |
Data supplied by | MarLIN |
| Refereed by | This information is not refereed |
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| Taxonomy |
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| Scientific name | Anoplodactylus spp. |
Common name | A sea spider |
| MCS Code | Q42 |
Recent Synonyms | |
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| Phylum | Chelicerata |
Subphylum | |
| Superclass | |
Class | Pycnogonida |
| Subclass | |
Order | Pantopoda |
| Suborder | |
Family | Phoxichilidiidae |
| Genus | Anoplodactylus |
Species | |
| Subspecies | |
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| Additional Information | |
| Taxonomy References |
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| General Biology |
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| Growth form | |
Feeding method | |
| Mobility/Movement | Burrower
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Environmental position | |
| Typical food types | |
Habit | Free living |
| Bioturbator | |
Flexibility | High (>45 degrees) |
| Fragility | Fragile |
Size | Very small(<1cm) |
| Height | |
Growth Rate | |
| Adult dispersal potential | |
Dependency | Independent |
| Sociability | Solitary |
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| Toxic/Poisonous? | No |
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| General Biology Additional Information | |
| Biology References |
Jarvis & King, 1978, |
| Distribution and Habitat |
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| Distribution in Britain & Ireland | |
| Global distribution | |
| Biogeographic range | |
Depth range | |
| Migratory | |
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| Distribution Additional Information | |
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| Substratum preferences | |
Physiographic preferences | |
| Biological zone | |
Wave exposure | |
| Tidal stream strength/Water flow | |
Salinity | |
| Habitat Preferences Additional Information | |
| Distribution References |
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| Reproduction/Life History |
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| Reproductive type | Gonochoristic
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Developmental mechanism | Planktotrophic
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| Reproductive Season | Spring to Summer |
Reproductive Location | As adult |
| Reproductive frequency | Annual episodic |
Regeneration potential |
No |
| Life span | Insufficient information |
Age at reproductive maturity | Insufficient information |
| Generation time | Insufficient information |
Fecundity | See additional information |
| Egg/propagule size | 0.12mm |
Fertilization type | Internal |
| Larvae/Juveniles |
| Larval/Juvenile dispersal potential | 10-100m |
Larval settlement period | Spring |
| Duration of larval stage | 11-30 days |
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| Reproduction Preferences Additional Information | Jarvis (1978) refers to Anoplodactylus as having similar eggs to Nymphon, but this is an inference drawn from other sources. Lebour (1946) mentions that the larval stage is ~12 days spent in a parasitic phase within Lobelia hydroids. The larval pycnogonids are also seen to be carried by the medusae of Obelia (Lebour, 1916) which may represent an important means of dispersal.
Eggs are initially carried by female before being transferred to male. Fertilisation is thought to take place on the transferal of mature eggs to the male, happens in deeper waters during winter migration. It is possible for two broods per year with early brood maturing in late summer. The male carrys more than one brood, 30-40 eggs are produced by a female, and 300-400 carried by male. |
| Reproduction References |
Jarvis & King, 1978, Lebour, 1946, Lebour, 1916, |
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