Luticola tomsui Kopalova 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 tomsui; Antarc*; Antarctica; James Ross Island; Ross Island
• Online Access: https://doi.org/10.5281/zenodo.4894487; http://treatment.plazi.org/id/038387FD6044FFD70DE6FAFAFA888B71

Luticola tomsui Kopalová, sp. nov. (Figs 73–87) Valvae lineares ad lineares-ellipticae apicibus late rotundatis. Margines clare sed asymmetrice constrictae in media parte valvae. Longitudo 18.5–23 µm, latitudo 6.5–8.1 µm. Area axialis lata, lanceolata, clare dilatata ad apices areamque centralem. Area centralis formans staurum rectangularem ad paene ellipticum, marginatum serie una areolarum parvarum rotundatarum ad leviter transapicaliter elongatarum. Stigma rimiformis solitaria adest, inter mediam partem valvae marginesque. Raphe filiformis, terminationibus proximalibus recta unilateraliter deflexis opposite stigma poris centralibus indistinctis. Fissurae distales curtae, leviter deflexae. Striae transapicales radiatae omnino, positae prope margines valvae, 16–18 in 10 µm. Areolae 1–2 rimiformes. Ad margines, areola expansa adest. Type :— ANTARCTICA. James Ross Island, Ulu Peninsula, Vondra II Lake, sample D39, leg. L. Nedbalova , coll. date 19/01/2009, slide no. BR-4244 (holotype BR, Fig. 78 is the encircled holotype specimen), slide PLP-192 (isotype University of Antwerp, Belgium), BRM-ZU8/10 (isotype BRM). Valves linear to linear-elliptic with broadly rounded, capitate apices (Figs 73–83). Stigma-bearing side almost straight with opposite side more convex. Valve margins clearly convex but asymmetrically constricted near valve middle. Valve length 18.5–23 µm, valve width 6.5–8.1 µm (n=15). Axial area broad, lanceolate, widening towards apices and central area, (Fig. 84). Central area forming rectangular to almost elliptical stauros, bordered by one series of small rounded to very weakly transapically elongated areolae (Figs 84, 85). One small slit-like solitary stigma present, halfway between valve centre and margin (Fig. 85). External raphe branches straight to weakly curved with unilaterally deflected proximal raphe endings, away from the stigma, terminating in almost unexpanded central pores (Fig. 85). Distal raphe fissures short, weakly deflected (Fig. 86). Transapical striae radiate throughout entire ...