BIOTIC Species Information for Anoplodactylus spp.
Researched bySean Lindsley-Leake Data supplied byMarLIN
Refereed byThis information is not refereed
Taxonomy
Scientific nameAnoplodactylus spp. Common nameA sea spider
MCS CodeQ42 Recent Synonyms

PhylumChelicerata Subphylum
Superclass ClassPycnogonida
Subclass OrderPantopoda
Suborder FamilyPhoxichilidiidae
GenusAnoplodactylus Species
Subspecies   

Additional Information
Taxonomy References
General Biology
Growth form Feeding method
Mobility/MovementBurrower
Environmental position
Typical food types HabitFree living
Bioturbator FlexibilityHigh (>45 degrees)
FragilityFragile SizeVery small(<1cm)
Height Growth Rate
Adult dispersal potential DependencyIndependent
SociabilitySolitary
Toxic/Poisonous?No
General Biology Additional Information
Biology References Jarvis & King, 1978,
Distribution and Habitat
Distribution in Britain & Ireland
Global distribution
Biogeographic range Depth range
Migratory   
Distribution Additional Information

Substratum preferences Physiographic preferences
Biological zone Wave exposure
Tidal stream strength/Water flow Salinity
Habitat Preferences Additional Information
Distribution References
Reproduction/Life History
Reproductive typeGonochoristic
Developmental mechanismPlanktotrophic
Reproductive SeasonSpring to Summer Reproductive LocationAs adult
Reproductive frequencyAnnual episodic Regeneration potential No
Life spanInsufficient information Age at reproductive maturityInsufficient information
Generation timeInsufficient information FecunditySee additional information
Egg/propagule size0.12mm Fertilization typeInternal
Larvae/Juveniles
Larval/Juvenile dispersal potential10-100m Larval settlement periodSpring
Duration of larval stage11-30 days   
Reproduction Preferences Additional InformationJarvis (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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