Staurotheca gracilis CANTERO, 2017, sp. nov. ...

• Main Author: ÁLVARO L. PEÑA CANTERO
• Format: Text
• Language: unknown
• Published: Zenodo 2017
• Subjects: Biodiversity; Taxonomy; Animalia; Cnidaria; Hydrozoa; Leptothecata; Sertulariidae; Staurotheca; Staurotheca gracilis; Antarctic; Ross Sea; New Zealand; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.5281/zenodo.4386826; https://zenodo.org/doi/10.5281/zenodo.4386826

Staurotheca gracilis sp. nov. (Figs 3 B, 10D–H) Material examined. Stn 53, one stem 60 mm high (holotype, NIWA 115614); Stn 139, one monosiphonic stem fragment 35 mm long (paratype, NIWA 115615). Description (Holotype). Stem 60 mm high (Fig. 3 B), basally polysiphonic, irregularly branched in approximately one plane. Branches narrow at origin (Fig. 10 D), basally more or less perpendicular to previous one, strongly curving upwards later. Branches repeatedly branched (up to sixth order present) (Fig. 3 B), with anastomose. A few perisarc constrictions irregularly distributed along stem and branches. Hydrothecae typically arranged in decussate verticils of three, resulting in six longitudinal rows of hydrothecae. Decussate pairs also present in some parts (Fig. 10 D). Hydrotheca elongate (Fig. 10 D–H), roughly cylindrical, almost completely adnate to branch, and with mushroom-shaped diaphragm. Measurements (in µm). Hydrothecae: abcauline wall 700–800, free part of adcauline wall 30–60, adnate part of adcauline ... : Published as part of ÁLVARO L. PEÑA CANTERO, 2017, Benthic hydroids (Cnidaria, Hydrozoa) from the Ross Sea (Antarctica) collected by the New Zealand Antarctic expedition BioRoss 2004 with RV Tangaroa, pp. 1-65 in Zootaxa 4293 (1) on page 32, DOI: 10.11646/zootaxa.4293.1.1, http://zenodo.org/record/828475 ...