Luticola quadriscrobiculata Van de Vijver 2008
Publication Details
Luticola quadriscrobiculata Van de Vijver 2008: 457, figs 18-28
Published in: Van de Vijver, B. & Mataloni, G. (2008). New and interesting species in the genus Luticola D.G. Mann (Bacillariophyta) from Deception Island (South Shetland Islands). Phycologia 47(5): 451-467, 104 figs, 1 table.
Request PDFPublication date: 2008
Type Species
The type species (holotype) of the genus Luticola is Luticola mutica (Kützing) D.G.Mann.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Near Crater Lake, Deception Island, South Shetland Islands; (Van de Vijver & Mataloni 2008: 457) Holotype: Mataloni; 14 February 2002; See habitat data for L. gigamuticopsis/L. caubergsii; BR; 4113 (Van de Vijver & Mataloni 2008: 457) Notes: Isotypes: PLP-107 (UA), BRM-ZU6/53.
General Environment
This is a freshwater species.
Description
Valves rhombic to rhombic-elliptic (not simply elliptic) with broadly to obtusely rounded, nonproduced apices. Valve length 15–25 µm, valve width 7.0–8.5 µm. Axial area relatively broad, almost linear, leaving a distinct hyaline area bordering the raphe branches. Central area rather narrow, forming an almost rectangular to slightly wedge-shaped stauros. On both sides of the central area, one series of very small areolae (usually three) is present. One slightly transapically elongated stigma present, located rather isolated in the central area. Four fairly distinct pit-like depressions (visible in LM) present in the central area, located halfway between the valve face margin and the valve center. Raphe branches short and curved. Central raphe endings weakly deflected opposite to the stigma-bearing valve side. Central pores slightly expanded. Terminal raphe fissures very short, weakly deflected. Transapical striae radiate throughout, 20–24 in 10 µm, each stria consisting of two to four small, rounded areolae. Areolae bordering the axial area distinctly larger. All other areolae small to even pinhead-like. Row of areolae alongside the valve face margin somewhat separated from the other areolae in the striae and consisting of somewhat transapically elongated areolae which increase in size towards the poles. Internally, poroids of the valve face usually occluded by hymenes, confluent with the striae, forming a continuous strip across the stria. Scrobiculi not visible in the central area. Internal stigma opening consisting of a curved, irregularly lipped slit.
Habitat
See habitat of type. Another soil sample from near Irizar Lake is dominated by several Muelleria taxa, Pinnularia borealis Ehrenberg s.l. and Psammothidium germainii.
Created: 11 November 2008 by G.M. Guiry.
Last updated: 10 January 2017
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=133848
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 10 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 April 2024
