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Psaromenia septentrionalis C.W.Schneid., Popolizio & G.W.Saunders

Publication details
Psaromenia septentrionalis C.W.Schneid., Popolizio & G.W.Saunders 2019: 420, fig. 4, A-F

Published in: Schneider, C.W., Popolizio, T.R. & Saunders, G.W. (2019). Collections from the mesophytic zone off Bermuda reveal three species of Kallymeniaceae (Gigartinales, Rhodophyta) in genera with transoceanic distributions. Journal of Phycology 55(2): 415-424, 4 figs.

Type species
The type species (holotype) of the genus Psaromenia is Psaromenia berggrenii (J.Agardh) D'Archino, W.A.Nelson & Zuccarello.

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

Origin of species name
Adjective (Latin), from the North.

No synonyms are currently included in AlgaeBase.

General environment
This is a marine species.

Rosy-red plants composed of subdichotomously branched ligulate blades, arising to 13 cm tall from small discoidal holdfasts, stipes lacking, the blades bearing marginal proliferations that eventually develop into fusiform to lanceolate blades, 300-500 µm thick; structure multiaxial, the cortex with cell layers increasing in size from the outermost pigmented cell layer to the innermost non-pigmented cell layer connecting to the filamentous medulla; pigmented cortex composed of one (-two) layers, the outermost cells polyhedral in surface view, subglobose or elongated to irregular in section, 3.5-7.5 µm in diameter; inner cortex of three layers of subglobose cells increasing inwardly in size and elongating parallel to the blade surface, the innermost 33.5-67.5 µm in diameter and connecting to the filamentous medulla; subsurface cortical cells often with clusters of refractive globules; medulla composed of a loose network of elongated filaments 7-12 µm in diameter, connected to stellate ganglia morphed from the innermost cortical cells; monocarpogonial supporting cells bearing a single 3-celled carpogonial branch and 3-4 sterile subsidiary cells, carposporophytes formed in groups within a cystocarp, in part separated by vegetative filaments, distally producing carpospores towards the center of the cystocarp; carpospores obpyriform to spherical and irregular, 9.5-17.0 µm in longest dimension; cystocarps formed over blades, at times on margins, when fully developed raising one surface or the other as pustule-like, irregular cystocarps to 1.3 mm in diameter, formed singly or at times in clusters of 3-4, ostioles lacking; spermatangia and tetrasporangia unknown.

Endemic to the mesophotic zone (90 m) off Bermuda, western Atlantic Ocean.

Key characteristics
Distinguished from the generitype, Psaromenia berggrenii, by its COI-5P (GenBank MH777603)and rbcL (GenBank MH777607) sequence data, its geographic location, lack of a mottled appearance and monocarpogonial supporting cells.

Type information
Holotype locality: north northeast of St. George’s I., 32°28’58.05”N, 64°35’04.31”W, Bermuda, western Atlantic Ocean (Schneider, Popolizio & Saunders 2019: 420). Holotype: Craig W. Schneider/Thea R. Popolizio 16-13-1 [BDA1993] ; 31 July 2016; deep ledge, depth 90 m, bottom temp. 19.4°C. UNB (Schneider, Popolizio & Saunders 2019: 420, fig. 4A ). Notes: Isotypes: BAMZ, Herb. CWS (CWS/TRP 16-13-1 [BDA1994]), MICH (CWS/TRP 16-13-3 [BDA1996]).

Detailed distribution with sources (Click to Load)

Created: 20 May 2019 by Craig Schneider

Verified by: 07 June 2019 by Wendy Guiry

Accesses: This record has been accessed by users times since it was created.

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Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=172452

Citing AlgaeBase
Cite this record as:
Wendy Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 26 June 2019.

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