Trichoglossum cf. octopartitum Mains

Ekanayaka, Anusha H., Hyde, Kevin D., Jones, E. B. Gareth, Zhao, Qi, Elgorban, Abdallah M. & Bahkali, Ali H., 2017, A new species of Trichoglossum (Geoglossales, Ascomycota) from Thailand, Phytotaxa 316 (2), pp. 161-170 : 167

Trichoglossum cf. octopartitum Mains ( Fig. 3 )

Facesoffungi number: FoF 03237

Description:— Saprobic on soil. Sexual morph: Apothecia 5–10 mm diam. × 30–40 mm high, scattered, stipitate, slender, clavate, fan to dumbbell-shaped, hirsute, black, ascogenous portion and sterile portion are not clearly distinguishable. Ascogenous portion flattened clavate to lanceolate, sometimes curved and branched, black, densely hirsute from setae. Sterile portion cylindrical or flexuous, densely hirsute from setae, concolorous with fertile part. Ascomatal core composed of dark brown cells of textura epidermoidea to intricata. Hymenial setae 140–160 × 6–8 μm, blackish-brown, acuminate, tapered at the apex and base, thick-walled, septate, sometimes protruding above hymenium. Paraphyses 2.5–3.5 μm wide, numerous, filiform, septate, apically enlarged and curved, light brown at the base and darker at the apex, walls granulate. Asci 180–220 × 22–32 μm, 8-spored, cylindrical-clavate, narrow below, apex rounded, amyloid, arising from croziers. Ascospores 95–105 × 4–6 μm, hyaline when immature and dark brown at maturity, fusoid to fusoid-clavate, immature spores aseptate, mature spores 7 to 9-septate, guttulate. Asexual morph: Unknown.

Material examined:— CHINA. Guangdong Province. Feng Kai County, Heishiding Mountains, on soil, 19 June 2013, Li Fang 1383.1 (HKAS 82228).

Notes:— Trichoglossum octopartitum is distinct from all the other species in the genus in having fusoid to fusoid-clavate ascospores, which are aseptate and hyaline when immature and brown and 7 to 9-septate at maturity ( Table 2). Morphology of our collection is similar to the type description ( Mains 1954) except the size of asci and ascospore septation. In our collection asci are slightly larger than that of in type collection from British Hondurus described by Mains (1954). Moreover there are only 7-septations in ascospores were observed in type collection. However we observed ascospores with 7 to 9-septa in our collection. Molecular data of T. octopartitum from type collection or any other collection from type locality is not available. However Hustad et al. (2013) provided molecular data of T. octopartitum from Europe and North America. Our collection from China cladded with North American collection (ILLS 67356) but with slightly long branch length. In here we kept our collection as Trichoglossum cf. octopartitum , because of its morphological and phylogenetic similarities to the type collection and to previously described collections of T. octopartitum ( Mains 1954; Maas Geesteranus 1965, Kučera et al. 2010, Hustad et al. 2013).

Figures

FIGURE 3. Trichoglossum cf. octopartitum (HKAS 82228). a. Apothecia, b. Vertical section, c. Close up of hymenium, d. Dark brown hymenial setae, e. Septate, unbranched paraphyses, f–i. Cylindrical asci, j. J+, apical apex in Melzer’s reagent, k–n. Elongate-subfusiform ascospores. Scale bars b=400 μm, c=100 μm, d–i=50 μm, j=15 μm, k–n=30 μm.