Luticola desmetii Kopalova & Van de Vijver 2011, sp. nov.

• Main Authors: Kopalová, Kateŕina, Nedbalová, Linda, Haan, Myriam De, Vijver, Bart Van De
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Chromista; Bacillariophyta; Bacillariophyceae; Naviculales; Diadesmidaceae; Luticola; Luticola desmetii; Antarc*; Antarctica; James Ross Island; Ross Island
• Online Access: https://doi.org/10.5281/zenodo.4923676; http://treatment.plazi.org/id/038387FD604BFFDC0DE6FA89FD5E8D08

Luticola desmetii Kopalová & Van de Vijver, sp. nov. (Figs 2–13) Valvae rhombicae at rhombicae-elloticae marginibus distincte convexis, apicibusque protractis, rostratis. Longitudo 22– 42.5 µm, latitudo 11.3–16.8 µm. Area axialis angustissima, paene linearis ad linearis-lanceolata, leviter dilatata in aream centralem. Sternum lineare adest marginatum depressionibus longitudinalibus. Area centralis irregularis, formans staurum rectangularem asymmetricum, marginatum serie una areolarum rotundatarum ad leviter transapicaliter elongatarum. Stigma solitaria magna rimiformis inter mediam partem valvae marginesque. Depressiones plures in area centrali, visibiles in microscopio photonico. Raphe filiformis, recta, terminationibus proximalibus indistinctis, fissurisque distalibus elongatis, deflexis. Striae transapicales radiatae in centro valvae, fortiter radiatae ad apices, 12–16 in 10 µm. Type :— ANTARCTICA. James Ross Island, Ulu Peninsula, Blue-Green Lake, sample D51, leg. L. Nedbalová , coll. date 27/01/2009, slide no. BR-4241 (holotype BR, Fig. 7 is the encircled holotype specimen), slide PLP-189 (isotype University of Antwerp, Belgium), BRM-ZU8/06 (isotype BRM). Valves rhombic to rhombic-elliptical with inflated, distinctly convex margins (Figs 2–8). Apices typically protracted, rostrate. Valve length 22–42.5 µm, valve width 11.3–16.8 µm (n=37). Axial area quite narrow, almost linear to linear-lanceolate, slightly widening towards the central area, formed by a raised, almost straight, linear sternum; bordered by longitudinal depressions (Fig. 9). Central area irregular, forming a rectangular, asymmetrical stauros, bordered by one series of rounded to very weakly transapically elongated areolae. One large, slit-like isolated stigma present, located halfway between valve margin and valve centre (Figs 9, 11). Multiple irregular, shallow depressions present in central area, visible in LM (Figs 9, 11). External raphe branches usually straight, with inconspicuous straight proximal raphe endings (Figs 9, 11). Distal ...