Coccodothis
Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246
Coccodothis Theiss. & Syd., Annls mycol. 12(3): 271 (1914)
Saprobic or parasitic on living leaves of Juniperus sp. Sexual morph: Ascostromata solitary, superficial to semi-immersed, epiphyllous, rarely hypophyllous semiorbicular to pulvinate, black. Peridium composed of isodiametric to polyhedric, dark brown, thick-walled cells. Presence of 3–4 loculi per ascostroma, separated from each other by a wall, composed of elongated, thick-walled, brown cells. Paraphyses hyaline, septate, becoming wider at their apices forming an epithecium. Asci bitunicate, fissitunicate, claviform, 8-spored with a distinct ocular chamber. Ascospores bi- to tri-seriate, 1-septate and constricted in their lower third, at first hyaline and covered by a mucous sheath, becoming brown with maturity, upper cell globose, lower cell nearly globose, wall smooth to slightly verrucose. Asexual morph: Undetermined.
Type species – Coccodothis sphaeroidea (Cooke) Theiss. & Syd.
Notes – The monotypic genus Coccodothis was introduced by Theissen & Sydow (1914) for the type species Coccodothis sphaeroidea (= Dothidea sphaeroidea Cooke 1878). The characters of the genus are epiphyllous ascostromata, peridium of isodiametric thick walled cells of textura angularis, claviform, bitunicate, 8-spored asci and one-septate brown ascospores. Muller & Sanwal (1954) placed the genus Coccodothis in the Patellariaceae, based on its similarity to the genus Karshchia Koerb. However, Coccodothis differs from this genus by its clearly formed hypostroma and a hymenium which is divided into several parts. Petrak (1954) included the genus in Polystomellaceae, whereas Muller & von Arx (1962) suggested its inclusion in the Parmulariaceae based on its parasitic lifestyle. Hyde et al. (2013) excluded the genus Coccodothis from Parmulariaceae and accepted it as a genus in Dothideomycetes, genera incertae sedis (Wijayawardene et al. 2014). Cultures and sequences are unavailable. We re-studied the isotype specimen of Coccodothis sphaeroidea from S herbarium under the code S-F51270 and illustrate the morphological characters of the genus. The species lack sequence data. We therefore, retain the genus in Dothideomycetes, genera incertae sedis.
References
Hyde KD, Jones EBG, Liu JK, Ariyawansa H et al. 2013 – Families of Dothideomycetes. Fungal Diversity 63, 1–313.
Müller E, Arx JA von. 1962 – Die Gattungen der didymosporen Pyrenomyceten. Beiträge zur Kryptogamenflora der Schweiz 11(2), 1–922.
Müller E, Sanwal BD – 1954. Uber die Gattungen Microcyclus Sacc., Coccoidella v. Hohn., Coccodothis Theiss. & Sydow und Coccodothella Theiss. & Sydow. Sydowia 8, 231–244.
Petrak F. 1954 – Beiträge zur Pilzflora Australiens. Sydowia 8, 192–220.
Theissen F, Sydow H. 1914 – Dothideazeen-Studien - II. Annales Mycologici 12, 268–281.
Theissen F, Sydow H. 1914 – Dothideazeen-Studien. Annales Mycologici 12, 176–194.
Wijayawardene NN, Crous PW, Kirk PM, Hawksworth DL et al. 2014b – Naming and outline of Dothideomycetes–2014 including proposals for the protection or suppression of generic names. Fungal Diversity 69, 1–5.
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