Canalisporium Nawawi & Kuthub., Mycotaxon 34(2): 477 (1989)
Savoryellomycetidae, Savoryellales, Savoryellaceae, Canalisporium
Saprobic on submerged wood. Sexual morph: Ascomata superficial or immersed to semi-immersed, globose to sub-globose, perithecial, dark brown to black, solitary, dispersed, long neck, ostiolate. Ostiole mostly central but if ascomata are lying straight to the host surface, then at one end and curving upwards, short or long, mostly black or brown, periphysate. Paraphyses hypha like, many, narrowing towards the end, not embedded in a gelatinous matrix. Asci 8-spored, unitunicate, long cylindrical, pedunculated, persistent, apically truncate, with a refractive, J-apical ring. Ascospores overlapping uniseriate or uniseriate, fusiform, straight or curved, 3-euseptate and versicolurus. Asexual morph: Colonies white to yellow when young, sporodochial, punctiform, dispersed, glistening, dark brown to black when mature. Mycelium hyaline to pale brown hyphae, immersed, comprising branched, septate, smooth, thin-walled. Conidiophores hyaline, semi-macronematous, unbranched, septate, smooth, thin-walled, becoming vesiculate and disintegrating as conidia mature. Conidiogenous cells hyaline or pale brown, monoblastic, combined, terminal, determinate, and oblong or often becoming swollen. Conidia pale olive brown or brown, acrogenous, solitary, smooth, thick-walled, generally ellipsoidal to obovoid in surface view, cylindrical to clavate in side view, muriform, with well-ordered arrangement of a single, straight or slightly curved column vertical septum and 2–6 rows diagonal septa, slightly constricted at the septa; septa becoming darker progressively with conidial maturity; basal cell pale brown, cuneiform. Conidial secession rhexolytic. (adapted from Maharachchikumbura et al. 2016).
Type species: Canalisporium caribense (Hol.-Jech. & Mercado) Nawawi & Kuthub., Mycotaxon 34(2): 479 (1989)
Notes: Canalisporium was introduced to accommodate Berkleasmium caribense, B. pulchrum (Holubová-Jechová & Mercado Sierra 1984) and Canalisporium elegans (Nawawi & Kuthubutheen 1989). At present, 15 species are recognized in this genus (Zhao et al. 2012). Sri-indrasutdhi et al. (2010) described a sexual morph for C. grenadoideum and introduced Ascothailandia, typified by A. grenadoidea. Dayarathne et al. (2019) showed that this genus emerged at the crown age of 56 (23–94) MYA.
Species illustrated in this entry:
Canalisporium caribense (Hol.-Jech. & Mercado) Nawawi & Kuthub.
Dayarathne MC, Maharachchikumbura SSN, Jones EBG, Dong W et al. 2019a – Phylogenetic revision of Savoryellaceae and evidence for its ranking as a subclass. Frontiers in Microbiology 10, 840
Holubová-Jechová V, Mercado Sierra A. 1984 – Studies on Hyphomycetes from Cuba II. Hyphomycetes from the Isla de la Juventud. eskáMykol 38, 96–120
Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC et al. 2016 – Families of Sordariomycetes. Fungal Diversity 79, 1–317
Nawawi A, Kuthubutheen AJ. 1989 – Canalisporium, a new genus of lignicolous Hyphomycetes from Malaysia. Mycotaxon 34, 475–487
Sri-indrasutdhi V, Boonyuen N, Suetrong S, Chuaseeharonnachai C et al. 2010 – Wood inhabiting freshwater fungi from Thailand: Ascothailandia gen. et sp. nov., Canalisporium sp. nov. with a key to Canalisporium species (Sordariomycetes Ascomycota). Mycoscience 51, 411–420
Zhao G, Yu P, Liu X. 2012 – Cancellidium and Canalisporium (Hyphomycetes) from China. Nova Hedwigia 96, 221–223