Dothideomycetes » Dothideomycetes, genera incertae sedis

Limaciniopsis

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

 

Limaciniopsis J.M. Mend., in Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 58 (1925)

Saprobic and parasitic on leaves of Rollandia racemosa. Sexual morph: Mycelium perisporioid, hyaline, filiform. Ascomata few, solitary, or in small groups, superficial, globular, amber-colored to dark brown, gelatinous, ostiolate, setae absent. Peridium thin, carbonaceous or membranaceous, 23-layered, composed of dark brown cells of textura angularis. Hamathecium of dense asci, lacking pseudoparaphyses. Asci 8-spored, bitunicate, fissitunicate, broadly clavate, with a short pedicel. Ascospores oblong to ellipsoid, hyaline when young, turning reddish brown at maturity, 4-celled, slightly constricted at the septum with two end cells hyaline. Asexual morph: Undetermined.

 

Type species Limaciniopsis rollandiae J.M. Mend.

 

Notes – Mendoza (1925) described the genus Limaciniopsis amongst the Capnodiaceae for the single species found related with a blue-green alga on leaves of Rollandia racemosa in Oahu, Hawaii. Batista & Vital (1957) reported that the species was a pyrenomycete and was parasitic on the mycelium of Sporoschisma sp. Batista and Vital (1957) described the asci as unitunicate in their illustrated account which matches that of Mendoza reasonably well. We could not observe the asci in the specimen that we examined. However, Batista & Ciferri (1963) referred to Limaciniopsis as a synonym of Phragmocapnias Theiss. & Syd. (q.v.), and consequently Limaciniopsis rollandiae was referred as a synonym of Phragmocapnias callitris (McAlpine) Cif. & Bat. (= Capnodium callitris McAlp. = Capnodium salicinum Mont. fide Fraser, 1935b). The asci of Phragmocapnias callitris were defined as bitunicate by Batista & Ciferri (1963) but no reference was made to 'Sporoschisma' which accompanies Limaciniopsis rollandiae. On other hand, Limaciniopsis was cited as a synonym of Capnodium by Von Arx & Muller (1975). We examined the type collection from BISH under the code BISH 499971. Unfortunately, we could not observe the asci as the specimen was in poor condition. However, it is clear that the genus is characterized by oblong to ellipsoidal, reddish brown ascospores. The genus Limaciniopsis is retained in Dothideomycetes, genera incertae sedis until fresh collections and molecular data are obtained.

 

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