Halopteris alternata ( Nutting 1900 )

Torres-Rodríguez, Javier, Ortiz-Oyola, Daniel, Puentes-Sayo, Alejandra, Lecompte, Orlando P. & Jauregui, Aminta, 2020, Genetic and morphologic identities of hydrozoans (Cnidaria, Hydrozoa) from reef patches of Santa Marta, Colombian Caribbean, Zootaxa 4758 (1), pp. 127-140 : 131

publication ID

https://doi.org/10.11646/zootaxa.4758.1.5

publication LSID

lsid:zoobank.org:pub:B3A6EB2D-0E5B-47F6-AB1D-799712B8B0F8

DOI

https://doi.org/10.5281/zenodo.3812753

persistent identifier

https://treatment.plazi.org/id/03898790-FFA6-FFAD-FF36-057BFE4B5BA8

treatment provided by

Plazi

scientific name

Halopteris alternata ( Nutting 1900 )
status

 

Halopteris alternata ( Nutting 1900)

Fig. 2 View FIGURE 2

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

Halopteris alternata Schuchert 1997: 42 , fig. 14.

Type locality. Bahamas: Barracuda Rocks ( Nutting 1900: 62) .

Voucher material. Reef patches of Santa Marta, Magdalena, Colombia. 53 feet (16 m), October 2015, SCUBA. Apical fragment of a colony 2 cm high, without hydrorhiza and with a male gonotheca.

Description. Segmented obliquely monosiphonic hydrocaulus with alternating hydrocladium, each of the main segments of the hydrocaulus and hydrocladium presents a main hydrothecae and three or four nematothecas: two laterals, one inferior and one upper axillary to the hydrothecae present in the distal part of the colony. The intersegments have a nematotheca in the middle part. Each hydrocladium has lateral apophyses with a first short, square segment devoid of nematothecas, the second segment is elongated, and with a nematotheca in the middle zone, the rest of the hydrocladium has homomerous segmentation. As in the hydrocaulus, the intersegments have a nematotheca in the middle part. The hydrothecae has a cup shape, the adcauline and abcauline wall are straight laterally, and it joins the hydrocaulus from half to three quarters of the adcauline wall. The middle-lower nematotheca is immobile and the margin does not exceed the base of the hydrothecae, the lateral nematotheca is cone-shaped and emerges from a short and mobile pedicel, the margin is smooth and is not everted. The nematothecas of the intersegments are similar to the mid-lower, but are mobile and have a longer adcauline wall. The axillary nematotheca is the same as the rest of nematothecas. All the nematothecas present two cameras (bitalamic). The male gonotheca emerges from the hydrocaulus through a pedicel of a segment and presents an oblong shape.

Reported distribution. The Gulf of Mexico ( Calder & Cairns 2009). Unites States in Florida ( Calder 2013). The Caribbean Sea ( Galea 2008; Calder & Kirkendale 2005). Eastern Atlantic ( Ansín Agís et al. 2001). Brazil ( Oliveira et al. 2016).

Kingdom

Animalia

Phylum

Cnidaria

Class

Hydrozoa

Order

Leptothecata

Family

Halopterididae

Genus

Halopteris

Loc

Halopteris alternata ( Nutting 1900 )

Torres-Rodríguez, Javier, Ortiz-Oyola, Daniel, Puentes-Sayo, Alejandra, Lecompte, Orlando P. & Jauregui, Aminta 2020
2020
Loc

Halopteris alternata

Schuchert, P. 1997: 42
1997
Loc

Plumularia alternata

Nutting, C. C. 1900: 62
1900