Acaulidae Fraser 1924
Creators
Description
Family Acaulidae Fraser, 1924b
Αcaulidae Fraser, 1924b: 173.
Current status. Valid.
Remarks. Stimpson (1853) described and illustrated Acaulis primarius, a remarkable new genus and species of solitary hydroid from Grand Manan Island, New Brunswick, Atlantic Canada. His polyp was unusual in having a very short, spike-shaped hydrocaulus beneath a large hydranth having scattered capitate tentacles and an irregular whorl of filiform tentacles at the base. Some early authors (e.g., Allman 1872) believed Stimpson’s hydroid constituted a hydranth that had detached from its stalk. Even though G.O. Sars (1874) subsequently described and accurately illustrated A. primarius from Lofoten, Norway, uncertainty persisted over the morphological structure of the species (e.g., Fewkes 1890; Dendy 1902; Fraser 1918c). Fraser (1924b) confirmed the morphology of its hydrocaulus, and established the family Acaulidae to accommodate the species.
The taxonomy of A. primarius has recently been reviewed by Schuchert (2006). As noted therein, two species were mistakenly included under that binomen by Stimpson (1853). However, Schuchert concluded that Allman (1872), in effect, had designated a lectotype (ICZN 74.5) by fixing its identity in conformity with that matching the longstanding concept of the species. That concept accords with the only illustration of A. primarius provided by Stimpson (1853, pl. 1, fig. 4). Type material of the species exists at the MCZ (Invertebrate Zoology Coel-162).
Notes
Files
Files
(1.9 kB)
Name | Size | Download all |
---|---|---|
md5:2989ab91df7b903615511f6a49885f54
|
1.9 kB | Download |
System files
(10.7 kB)
Name | Size | Download all |
---|---|---|
md5:aa23c76356c129cb1d3e8dbccecb60f4
|
10.7 kB | Download |
Linked records
Additional details
Identifiers
Biodiversity
- Family
- Acaulidae
- Kingdom
- Animalia
- Order
- Anthoathecata
- Phylum
- Cnidaria
- Scientific name authorship
- Fraser
- Taxon rank
- family
- Taxonomic concept label
- Acaulidae Fraser, 1924 sec. Calder & Choong, 2018
References
- Fraser, C. M. (1924 b) Acaulis primarius Stimpson. Transactions of the Royal Society of Canada, Series 3, Section 5, 18, 167 - 173. [Read May 1924; 1924]
- Stimpson, W. (1853) Synopsis of the marine Invertebrata of Grand Manan: or the region about the mouth of the Bay of Fundy, New Brunswick. Smithsonian Contributions to Knowledge, 6 (5), 1 - 67.
- Sars, G. O. (1874) Bidrag til kundskaben om norges hydroider. Forhandlinger i Videnskabs-Selskabet i Christiania, 1873, 91 - 150.
- Fewkes, J. W. (1890) Α zoological reconnoissance in Grand Manan. American naturalist, 24, 423 - 438. https: // doi. org / 10.1086 / 275123
- Dendy, Α. (1902) On a free-swimming hydroid, Pelagohydra mirabilis, n. gen. et sp. Quarterly Journal of Microscopical Science, New Series, 46, 1 - 24.
- Fraser, C. M. (1918 c) Hydroids of eastern Canada. Contributions to Canadian Biology, 1917 - 1918, 329 - 367. [1918: dated following Huntsman & Fraser (1922); taken to be 31 December 1918 under ICZN Αrt. 21.3.2]
- Schuchert, P. (2006) The European athecate hydroids and their medusae (Hydrozoa, Cnidaria): Capitata Part 1. Revue Suisse de Zoologie, 113, 325 - 410. https: // doi. org / 10.5962 / bhl. part. 80356