Halopteris alternata ( Nutting, 1900 )

Calder, Dale R., 2013, Some shallow-water hydroids (Cnidaria: Hydrozoa) from the central east coast of Florida, USA, Zootaxa 3648 (1), pp. 1-72 : 41-42

publication ID

https://dx.doi.org/10.11646/zootaxa.3648.1.1

publication LSID

lsid:zoobank.org:pub:22089255-436A-4DBB-BD93-1D3C8CF281FE

persistent identifier

https://treatment.plazi.org/id/039B197E-FFF7-F56D-E6F9-F894FD65171D

treatment provided by

Felipe

scientific name

Halopteris alternata ( Nutting, 1900 )
status

 

Halopteris alternata ( Nutting, 1900)

Fig. 11d, e View FIGURE 11

Plumularia alternata Nutting, 1900: 62 , pl. 4, figs. 1, 2.

Plumularia diaphana .— Weiss, 1948: 158 [not Plumularia diaphana ( Heller, 1868) ]. Type locality. Bahamas: Barracuda Rocks ( Nutting 1900: 62).

Voucher material. West Palm Beach , on reef seaward of the Breakers Hotel, 45 feet (13.7 m), together with Halopteris carinata , January 1991, SCUBA, one colony, 2.5 cm high, without gonophores, coll. P. Humann, ROMIZ B3974 .

Remarks. Halopteris alternata ( Nutting, 1900) was originally described from material collected by Alexander Agassiz and party during the cruise of the steamer Wild Duck to the Bahamas in 1893. Most authors during the twentieth century followed Bedot (1914) in regarding it as coterminous with H. diaphana ( Heller, 1868) , a species originally described from the Adriatic Sea. However, several characters distinguishing H. alternata from H. diaphana were documented by Schuchert (1997): (1) an axillar nematotheca is usually present distal to cauline hydrothecae; (2) segmentation of the hydrocaulus is homomerous rather than heteromerous; (3) hydrocladial internodes usually have one rather than 2–3 nematothecae; (4) female gonothecae are fusiform and straight rather than being cornucopia-shaped. Based on such differences, Halopteris alternata is now taken to be a valid species, and material examined above is assigned to it.

Reported distribution. Atlantic coast of Florida. Biscayne Bay ( Weiss 1948, as Plumularia diaphana ).

Western Atlantic. South Carolina ( Wenner et al. 1984, as Halopteris diaphana ) to Brazil (Oliveira et al. submitted), including Bermuda ( Calder 1997, as H. diaphana ), the Gulf of Mexico ( Calder & Cairns 2009), and the Caribbean Sea ( Galea 2008). It is carried northwards to North Carolina (and probably beyond) on Sargassum and Turbinaria ( Fraser 1912b, as Plumularia alternata ).

Elsewhere. Eastern Atlantic ( Ansín Agís et al. 2001). Records from the Pacific and Indian oceans are questionable (see Ansín Agís et al. 2001; Galea 2008).

Kingdom

Chromista

Phylum

Ochrophyta

Class

Phaeophyceae

Order

Sphacelariales

Family

Stypocaulaceae

Genus

Halopteris

Loc

Halopteris alternata ( Nutting, 1900 )

Calder, Dale R. 2013
2013
Loc

Plumularia diaphana

Weiss, C. M. 1948: 158
Nutting, C. C. 1900: 62
1948
Loc

Plumularia alternata

Nutting, C. C. 1900: 62
1900