Halecium secundum Jaderholm 1904 ...

• Main Authors: Soto, Joan J., Peña, Álvaro L.
• Format: Text
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Haleciidae; Halecium; Halecium secundum; Weddell; Weddell Sea; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5281/zenodo.5935000; https://zenodo.org/doi/10.5281/zenodo.5935000

Halecium secundum Jäderholm, 1904 (Fig. 14 b–c) Material examined. ANT XV/3: 48-50, one colony, c. 70 mm high, with male gonothecae; 48-58, one colony, c. 65 mm high; ANT XXI/2: PS65/278, mass of stems, c. 140 mm high, with male gonothecae. Remarks. The species had not been found with gonothecae since its original description (Jäderholm 1904), and only male ones are known. Our material is provided with male gonothecae: 1.3–1.5 mm high, 380 µm in maximum diameter; very delicate, easily collapsible; cylindrical, truncated distally; with terminal, circular aperture (Fig. 14c). Jäderholm (1904) mentioned a shallow distal furrow and a proximal sharp keel in the gonothecae. However, given the delicate consistency of the gonothecae, we regard Jäderholm’s observations as a probable artefact that occurred when mounting the microslides. Peña Cantero (2014b) revised the holotype of Halecium brevithecum Watson, 2008, discussed the few differences between H. secundum and H. brevithecum, and noted that the latter was ... : Published as part of Soto, Joan J. & Peña, Álvaro L., 2019, Benthic hydroids (Cnidaria, Hydrozoa) from the Weddell Sea (Antarctica), pp. 1-78 in Zootaxa 4570 (1) on page 42, DOI: 10.11646/zootaxa.4570.1.1, http://zenodo.org/record/2608527 ...