Sertularella curta Galea & Schories 2014
- Dataset
- Taxonomic revision of the genus Sertularella (Cnidaria: Hydrozoa) from southern South America and the subantarctic, with descriptions of five new species
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Cnidaria
- class
- Hydrozoa
- order
- Leptothecata
- family
- Sertulariidae
- genus
- Sertularella
- species
- Sertularella curta
description
Description: Colonies arising from creeping, branching stolon. Stems erect, up to 1.8 cm high, monosiphonic; basal part very short and ahydrothecate, either smooth or with up to 4 annuli; remainder of stem slightly geniculate, divided into short internodes by means of inconspicuous constrictions of the perisarc; a hydrotheca to the distal end of each internode. Side branches, when present (up to 3 per stem), short and arising irregularly from below a stem hydrotheca, either in front or the rear side of the colony; occasionally, the branches arise from within the stem hydrothecae; up to 2 nd order branching observed. Hydrothecae biseriate, alternate, fusiform, adnate for about 2 / 3 rd their length to the corresponding internode; free adaxial wall with about 3 transverse ridges prolonged abaxially; abaxial wall slightly concave, aperture expanding below rim, and perpendicular to long axis of the theca; margin with 4 equally-developed, triangular cusps separated by rounded, moderately-deep embayments; a 4 - flapped operculum; 3 internal, submarginal cusps (2 latero-adaxial, 1 abaxial), not always noticeable. Gonothecae (only male known) originating from below the hydrothecal bases; ovoid-fusiform, walls with 6 - 7 transverse ridges, aperture surrounded by 4 perisarc projections. Dimensions: Internodes 340 - 490 μm long and 170 - 210 μm wide at nodes. Hydrothecal free adaxial length 345 - 380 μm, adnate adaxial length 230 - 270 μm, abaxial length 485 - 515 μm, maximum width 250 - 270 μm, diameter at aperture 210 - 230 μm. Male gonotheca 1440 - 1660 μm long and 575 - 620 μm wide.
description
Fig. 7 M, N
discussion
Remarks: The gonotheca of this species is illustrated by Galea et al. (2014, fig. 7 C).
distribution
Distribution: Chile – Región de Antofagasta [Bahía de Tocopilla (Leloup, 1974, as S. geniculata), Taltal (Galea et al., 2014)].
materials_examined
Material examined: MHNG-INVE- 86236; Chile, Región de Antofagasta, Taltal, - 25.38333 ° - 70.51667 °, 12 - 20 m, coll. D. Schories, lot # 24; 24.04.2012; a 1.8 cm high, male colony (holotype). – MHNG- INVE- 86237; Chile, Región de Antofagasta, Taltal, - 25.38333 ° - 70.51667 °, 12 - 20 m, coll. D. Schories, lot # 25; 22.04.2012; a 1.6 cm high, male colony (paratype).