Howella gorgoniarum C.W.Schneider, Popolizio & G.W. Saunders 2019

Publication Details
Howella gorgoniarum C.W.Schneider, Popolizio & G.W. Saunders 2019: 692, figs 9-14

Published in: Schneider, C.W., Popolizio, T.R., Kraft, L.G.K. & Saunders, G.W. (2019). New species of Galene and Howella gen. nov. (Halymeniaceae, Rhodophyta) from the mesophotic zone off Bermuda. Phycologia 58(6): 690-697.

Publication date: published on line 27 October 2019

Type Species
This is the type species (holotype) of the genus Howella.

Status of Name
This name is of an entity that is currently accepted taxonomically.

Type Information
Holotype locality: west of High Point, Bermuda Island (32°15.31200'N, 65°02.19600'W); (Schneider et al. 2019: 692) Holotype: Craig W. Schneider; 24 August 2010; depth 35-36 m; UNB; 10-29-10 [BDA0443] (Schneider et al. 2019: 692, fig. 9) Notes: Isotype: Herb. CWS [BDA0444].

General Environment
This is a marine species.

Cartilaginous plants epizoic above the bases of soft corals as clusters of blades to 3.5 cm tall arising from short stipes off small to large common discoidal holdfasts that penetrate the outer layer of soft corals; blades ligulate, simple to bifurcate, to 2–6 mm wide and 70–300 µm thick, the undulate margins entire to denticulate and erose; stipes slightly penetrating into the base of blades as short midribs that thicken the blades more than 3 times the areas lacking midribs; in basal portions lacking midribs, blades thickest centrally and thinning to the margins; cortex consisting of 2–3(–5) layers, the outer cortex in surface view a mosaic of small to large circular clusters of rounded irregular cells 4.5–9.0 µm in longest dimension, and rounded elongate rectangular to square, 4.5–7.5 µm long in transverse section; inner cortical layers slightly larger, elongating transversely to twice the size of the outer cortex; medulla connected to inner cortical cells, at maturity comprised of a tight matrix with densely packed, intertwining and swirling, often parallel, elongate filaments, 1.5–6.0 µm diam.; sporangia unknown; gametophytes monoecious, spermatangia borne from elongated mother cells raised above the outer cortex; cystocarps borne in wart-like clusters at apices of branches thickening the blades, 150–200 µm diam.; carposporangia obpyriform to irregular, to 19 µm long.

Grows near the bases of living soft whip and fan corals, thus “of the gorgonians” (= alcyonarians) in deep water.

Created: 07 January 2020 by G.M. Guiry.

Last updated: 21 January 2020

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Citing AlgaeBase
Cite this record as:
Craig Schneider in Guiry, M.D. & Guiry, G.M. 21 January 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 27 September 2023

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