Pleosporales » Pleosporales genera incertae sedis » Camarographium

Camarographium clematidis

Camarographium clematidis Wijayaw., Camporesi, McKenzie & K.D. Hyde, in Wijayawardene et al., Fungal Diversity: 10.1007/s13225-016-0360-2, [71] (2016)

Index Fungorum number: IF 551767; Facesofungi number: FoF 01447

Etymology: Named after the host genus.

Holotype: MFLU 15-3444

Saprobic on twigs, branches and stems of Clematis vitalba. Sexual morph: Undetermined. Asexual morph: Conidiomata 400–450 μm diam., 450–550 μm high, pycnidial, gregarious, immersed, globose, unilocular, dark brown, ostiolate. Ostiole papillate, single, central, circular. Conidiomata wall outer layer thick, 30–40 μm, composed of thin-walled, brown cells of textura angularis, inner layer thin, 3–4 μm, composed of subhyaline-walled cells of textura angularis. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 3–8 × 8–10 μm, enteroblastic, phialidic, determinate, discrete, hyaline, smooth. Conidia 47–57 × 24–34 μm (x̄ = 49.6 × 28.6 μm, n = 20), pale brown, oblong to ellipsoid, globose, base obtuse, guttulate when immature, distoseptate, with 2–4 transverse septa, numerous longitudinal or oblique septa, thin and smooth-walled, guttulate when immature.

Material examined: Italy, Forlì-Cesena [FC] Province, Collina di Pondo - Santa Sofia, dead branch of Clematis vitalba L. (Ranunculaceae), 24 October 2013, Erio Camporesi, IT-1488 (MFLU 15-3444, holotype); (HKAS92551, isotype).

GenBank:

Notes: The distoseptate conidia of Camarographium species separate them from camarosporium-like taxa. Based on morphology (Sutton 1980), we conclude our collection is properly placed in Camarographium. Our collection has wide conidia and is morphologically distinct from other described species (Crous et al. 2011) and it is thus introduced as a new species. Single spore isolation of Camarographium clematidis was successful, but germinated conidia did not grow further in PDA or MEA. In morphology, Camarographium clematidis resembles with Magnicamarosporium iriomotense, the type species of Magnicamarosporium (Tanaka et al. 2015) however, our collection lacks paraphyses (Wijayawardene et al. 2016).

 

Figure x. Camarographium clematisidis (holotype). a, b Conidiomata on host material. c Vertical section of conidioma. d–f Different stages of conidiogenesis. g–j Conidia. Scale bars: c=200 μm, d–j=20 μm.

 

 

References:

 

Crous PW, Groenewald JZ, Lombard L, Wingfield MJ 2012 – Homortomyces gen. nov., a new dothidealean pycnidial fungus from the Cradle of Humankind. IMA Fungus 3, 109–115.

Sutton BC 1980 – The Coelomycetes. Fungi imperfecti with pycnidia, acervuli and stromata.

Tanaka K, Hirayama K, Yonezawa H, Sato G et al. 2015 – Revision of the Massarineae (Pleosporales, Dothideomycetes). Studies in Mycology 82, 75–136.

Wijayawardene NN, Hyde KD, Wanasinghe DN, Papizadeh M et al. 2016 Taxonomy and phylogeny of dematiaceous coelomycetes. Fungal diversity 77, 1316.

 

Last Update: 09 April 2021

 

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