Primnoella biserialis Wright & Studer 1889
- Dataset
- New records of octocorals (Cnidaria, Anthozoa) from the south western Atlantic Ocean, with zoogeographic considerations
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Cnidaria
- class
- Anthozoa
- order
- Alcyonacea
- family
- Primnoidae
- genus
- Primnoella
- species
- Primnoella biserialis
description
Description. Finely planar colony, branching dichotomously, 32 cm in height. Terminal branches whiplike. Polyps appear in whorls of 6 – 7 polyps, which are uniformly spaced along the stem. Polyps 1.2 – 1.5 mm in height. Polyp scales placed in two abaxial longitudinal rows with 13 – 15 scales. Scales with multituberculate warts. Opercular scales ovoid with concentric lines (0.087 – 0.10 mm wide and 0.15 – 0.21 mm long); triangulated marginal scales with a small terminal point (0.18 mm wide and 0.23 mm long); and basal and medial scales rounded, rectangular, polygonal (0.23 mm wide and 0.16 mm long). Coenenchymal scales rounded with few warts (0.06 – 0.1 mm wide and 0.098 – 0.15 mm long), small tuberculated rods (0.036 mm wide and 0.078 mm long) and a few tuberculate clubs (0.053 mm wide and 0.11 mm long).
diagnosis
Diagnosis. See Wright and Studer 1889: 87 – 88, pl. XVII, fig. 3, pl. XXI, fig. 14. Material examined. ARGENTINA, Chubut, San Matías Gulf, 41 º 13 ’ S, 65 º 59 ’ W, 30 April 1971, st. 110, 90 m, “ Survey S. A. O. II ”, (MLP s / n).
discussion
Remarks. The present record is the first off the Argentinian continental slope.
distribution
Distribution (Fig. 1). Macaé (39 m) (Brazil), Montevideo (35 º 05 ’ S, 52 º 33 ’ W, 115 m) (Uruguay) (TixierDurivault 1969 – 70); Tom Bay (50 º 10 ’ S, 74 º 42 ’ W, 815 m) (Chile) (Wright & Studer 1889); Smyth Canal (15 m) (Chile) (May 1899); Burdwood Bank (54 º 43 ' S, 60 º 14 ' W, 202 m) (Broch 1965). New record. San Matías Gulf, Chubut (Argentina).