Dothideomycetes » Dothideomycetes, genera incertae sedis » Lautitia

Lautitia danica

Lautitia danica (Berl.) S. Schatz, Can. J. Bot. 62(1): 31 (1984).

            Leptosphaeria danica Berl., Icon. fung. (Abellini) 1(2): 87 (1892).

 Index Fungorum number: IF 106972; Facesoffungi number: FoF 00288, Fig. 1, 2

 Description:

Biotrophic in red algae. Sexual morph: See Phookamsak et al. (2014). Asexual morph: Conidiomata 150–170 µm diam., 95–110 µm high brown to dark brown or black, stromatic, pycnidial, solitary to gregarious, subepidermal, immersed to semi-immersed or erumpent, globose to subglobose, glabrous, papillate, ostiolate. Ostiole 70–95 µm single, cylindrical to circular, centrally located. Conidiomatal wall 8–11 µm composed of thick-walled, pale brown to hyaline cells of textura angularis to textura epidermoidea. Conidiophores 15–20 × 1–3 µm (x̅ = 18.0 × 2.3 µm, n = 10), formed from the innermost layers of conidiomata wall, hyaline, subcylindrical, branched, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, with percurrent proliferation at apex, annellidic, cylindrical to ampulliform, discrete or integrated, smooth-walled. Conidia 5–8 × 3–5 µm (x̅ = 6.9 × 4.0 µm, n = 10), hyaline, cylindrical, straight or slightly curved, unicellular, smooth-walled, eguttulate.

      Material examined: Denmark, Klitmøller, on Chondrus crispus (Gigartinaceae), V. Sarauw, 1 September 1887 (C-F-70866, holotype).

Fig. 1 Lautitia danica (C-F-169758, holotype). ac Microslides and herbarium specimen. d Section of conidioma. e Conidiomatal wall. f Ostiole. g, h Conidiophores and Conidiogenesis. i Conidia. Scale bars: d = 100 μm, e, g, h = 20 μm, f, i = 10 μm.

Fig. 2 Lautitia danica (NY 01390859, sexual morph). a, b Herbarium material. c Ascostromata on host substrate. d Cross section of ascostroma (stained in congo red). e Section through peridium stained in congo red. f Pseudoparaphyses. g−i Asci. j−p Ascospores (p: stained in Indian ink). Scale bars: c = 500 µm, d, f−i = 50 µm, e = 40 µm, j−p = 20 µm.

Importance and distribution

Lautitia comprises only one species known on Chondrus crispus (Gigartinaceae) in Europe (France).

 

References

Hyde KD, Jones EBG, Liu JK, Ariyawansa H et al. 2013 – Families of Dothideomycetes. Fungal Diversity 63, 1–313.

Phookamsak R, Liu JK, McKenzie EH, Manamgoda DS et al. 2014 – Revision of Phaeosphaeriaceae. Fungal Diversity 68, 159–238.

Schatz S. 1984 – The life history, developmental morphology, and taxonomy of Lautitia danica gen. nov., comb. nov. Canadian Journal of Botany 62, 28–32.

Zhang Y, Crous PW, Schoch CL, Hyde KD. 2012 – Pleosporales. Fungal Diversity 53, 1–221.

 

About Dothideomycetes

The website Dothideomycetes.org provides an up-to-date classification and account of all genera of the class Dothideomycetes.

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