Hydrallmania spp.

Researched By	Sean Lindsley-Leake	Data Supplied By	MarLIN
Refereed by	This information is not refereed
Taxonomy
Scientific name	Hydrallmania spp.	Common name	A hydroid
MCS Code	D423	Recent Synonyms	Not researched
Phylum	Cnidaria	Subphylum
Superclass	Hydrozoa	Class	Leptolida
Subclass	Leptothecatae	Order	Conica
Suborder		Family	Sertularidae
Genus	Hydrallmania	Species
Subspecies
Additional Information
Taxonomy References
General Biology
Growth form		Feeding method
Mobility/Movement	Permanent attachment	Environmental position
Typical food types		Habit	Erect
Bioturbator	Not relevant	Flexibility	High (>45 degrees)
Fragility	Fragile	Size	Medium(11-20 cm)
Height	Up to 64 cm	Growth Rate
Adult dispersal potential	10-100m	Dependency	Independent
Sociability	Colonial
Toxic/Poisonous?	No
Additional Information
Biology References
Distribution and Habitat
Distribution in Britain & Ireland	Widespread off all British and Irish coasts.
Global distribution	Found from the Arctic to south-west Europe.
Biogeographic range	Cold temperate to temperate.	Depth range	20 to 100 m.
Migratory
Distribution Additional Information
Substratum preferences		Physiographic preferences
Biological zone		Wave exposure
Tidal stream strength/Water flow		Salinity
Habitat Additional Information
Distribution References
Reproduction/Life History
Reproductive type	Budding, Permanent hermaphrodite	Developmental mechanism	Lecithotrophic
Reproductive Season	December to April	Reproductive Location	Insufficient information
Reproductive frequency	Annual episodic	Regeneration potential	Yes
Life span	Insufficient information	Age at reproductive maturity	Insufficient information
Generation time	Insufficient information	Fecundity	Insufficient information
Egg/propagule size	140 µm	Fertilization type	Internal
Larvae/Juveniles Larval/Juvenile dispersal potential Insufficient information Larval settlement period Insufficient information Duration of larval stage Insufficient information
Additional Information	The reproductive mechanisms of Hydrallmania are thought to be: planktotrophic planula larvae, with budding within colony.
Reproduction References	Kosevich, 2006