Stenocephalum, a New Genus for Rhinotrichum Subalutaceum (Hyphomycetes)

Autor: C. J. K. Wang, George P. Chamuris
Rok vydání: 1990
Předmět:
Zdroj: Mycologia. 82:528-532
ISSN: 1557-2536
0027-5514
DOI: 10.1080/00275514.1990.12025922
Popis: Peck (1881) described Rhinotrichum subalutaceum from decaying wood in New York. The fungus formed brownish-alutaceous colonies with verrucose, tan-colored hyphae and conidio? phores. One-celled, echinulate conidia were borne on short denticles and were produced sympodially on the tips ofthe conidiogenous cells (Fig. !)? The genus Basifimbria was erected by Subramanian and Lodha (1968) with the single species B. aurea Subramanian & Lodha, isolated from horse dung in India. This fungus was character? ized by a light golden-colored colony on agar; hyaline, smooth hyphae; and pale yellow, smooth, simple or branched conidiophores. One-celled echinulate conidia were borne on denticles and produced sympodially on the upper half of the conidiogenous cell, with rhexolytic conidium secession. Holubova-Jechova (1982) considered B. aurea to be conspecific with R. subalutaceum, transferring R. subalutaceum to Basifimbria. Previ? ously Arx (1981) had reduced Basifimbria to syn? onymy with Dicyma, and proposed the combination Dicyma aurea (Subramanian & Lodha) Arx. Seifert and Kendrick (Seifert et al, 1983) later determined that B. aurea was conspecific with Cephalosporium succineum Massee & Salmon, known from sheep dung (Massee and Salmon, 1902), and made the combination Basifimbria succineum (Massee & Salmon) Seifert & Ken? drick. The "type" of C. succineum is a drawing in Massee and Salmon (1902). In our opinion the drawing agrees well with the illustration of Seifert et al. (1983), and with our dung isolates (Wang 1194 and 1218). Other species having supposed affinities with Basifimbria include B. peruviana (Matsu.) de Hoog (de Hoog and Hermanides-Nijhof, 1977), and Dicyma olivacea (Emoto & Tubaki) Arx (Arx, 1981). In our opinion neither of these species belongs either in Basifimbria or Stenocephalum. Basifimbria peruviana (= Rhinocladiella peru? viana Matsushima, 1975) has close affinities with Rhinocladiella. We agree that D. olivacea belongs in Dicyma. In 1982, a suspected tomentelloid fungus was collected in New York on decaying wood (GPC 1350). The specimen proved to be identical mor? phologically with the type specimen of R. subalutaceum. Two cultures (Wang 1194 and 1218) identified as B. succinea were later isolated from
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