Meredithia crenata C.W.Schneider, G.W.Saunders & C.E.Lane 2014

Publication Details
Meredithia crenata C.W.Schneider, G.W.Saunders & C.E.Lane 2014: 176, figs 4A-K, 5A-C

Published in: Schneider, C.W., Saunders, G.W. & Lane, C.E. (2014). The monospecific genus Meredithia (Kallymeniaceae, Gigartinales) is species rich and geographically widespread with species from temperate Atlantic, Pacific, and Indian Oceans. Journal of Phycology 50(1): 167-186, 8 figs.

Publication date: 17 February 2014

Type Species
The type species (lectotype) of the genus Meredithia is Meredithia microphylla (J.Agardh) J.Agardh.

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

Type Information
Type locality: "Walsingham Pond, Bermuda I., Bermuda, western Atlantic Ocean, 32°20' 48.2" N, 64°42' 40.9" W, from 5 m on a shaded vertical ledge at the western end of the salt pond."; (Schneider, Saunders & Lane 2014: 176) Holotype: G.W. Saunders GWS001247; November 12, 2001; UNB; (Schneider, Saunders & Lane 2014: 176)

General Environment
This is a marine species.

Gametophytes decumbent, spreading to 6 cm at maturity, arising from short, simple to branched stipes on the lower surface, the stipes central to submarginal, occasional secondary stipes forming from margins or blades. Blades initially elliptical to reniform with smooth margins to 1.5 cm in diam., early on becoming highly crenate; some terminal crenations first developing as finger-like projections on margins, later elongating into flattened blades, at maturity these reaching 0.5 cm diam. and 300 µm thick, the margins mostly remaining crenate. Cortex composed of 4-5 layers of pigmented cortical cells diminishing in size from the medulla to the outer cortex, 2-5 µm diam. in surface view, connecting to a non-pigmented, intertwining, finely filamentous medulla with cells to 1.5 µm diam. and occasional large stellate ganglion cells. Gametophytes monoecious, female supporting cells bearing a 3-celled carpogonial branch and 1-many subsidiary cells. Cystocarps to 400 µm in diam., producing a tight mass of small carpospores to 3 µm. Spermatangia to 2 µm diam. in scattered irregular sori on both blade surfaces. Tetrasporophytes unknown.

Created: 17 February 2014 by M.D. Guiry.

Last updated: 22 February 2014

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 22 February 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 02 October 2022

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