Family HYDRIDAE Dana, 1846
Ecological Descriptors
No medusa phase or gonophore development, asexual reproduction. Freshwater.
Diagnosis
Hydroid solitary, with hollow filiform tentacles, but often moniliform distally, in one whorl under hypostome; lower part of hydranth with simple pedal disc, no perisarc except on encysted embryos.. Without medusa phase or gonophore development, eggs and sperm developed directly in epidermis of polyps in wart-like protuberances; asexual reproduction by lateral buds, leading only to temporary colonies. [Diagnosis from WoRMS: http://www.marinespecies.org/aphia.php?p=notes&id=155927].
History of changes
Note that this list may be incomplete for dates prior to September 2013.
| Published | As part of group | Action Date | Action Type | Compiler(s) |
|---|---|---|---|---|
| 03-Sep-2018 | HYDROZOA Owen, 1843 | 31-Jul-2018 | MODIFIED | Dr Narissa Bax |
| 13-Aug-2013 | ADDED |