Ceriosporopsis
halima
Linder, Farlowia 1: 409 (1944)
Sordariomycetes, subclass Hypocreomycetidae
Microascales
Halosphaeriaceae
Sexual morph: Ascomata 80-481 μm high, 130-503 μm diam., subglobose, ellipsoidal or cylindrical, immersed or superficial, ostiolate, papillate, coriaceous, dark brown to black, reddish-brown when empty, solitary or gregarious. Necks up to 706 μm long, 16-30(-56) μm diam., centric or eccentric, cylindrical, ostiolar canal at first filled with a small-celled pseudoparenchyma. Peridium 8-26 μm thick, composed of three to four (to ten) layers of thin-walled, elongated cells with large lumina, merging into the pseudoparenchyma of the venter. Pseudoparenchyma of thin-walled, polygonal cells filling venter of young ascomata. Asci 56-89 × 14-22 μm, eight-spored, ellipsoidal, subclavate or subfusiform, short pedunculate, unitunicate, thin-walled, deliquescing before ascospore maturity, without apical apparatus, developing at the base of the ascoma venter. Ascospores 18-27(-35) × 6-12 μm, ellipsoidal to fusiform-ellipsoidal, 1-septate, slightly or strongly constricted at the septum, hyaline, surrounded by a gelatinous, exosporic sheath that is pierced at each apex by a polar appendage that uncoils in water. Appendages 5-8 μm diam., of variable length, terminal, simple, subcylindrical, tapering, finally becoming viscous and filamentous. Chlamydospores from pure cultures 6-17 μm diam., reddish-brown, catenulate, chains up to 90 μm long, up to 13-celled, terminal, simple or rarely ramose, curved, frequently ½ or ¾ times coiled, single cells globose, ellipsoidal or subcylindrical, sometimes increasing in diameter from base to apex. Asexual morph: Undetermined.
Key references:
Abdel-Wahab MA, Dayarathne M, Suetrong S, Guo SY, Siti Alias SA, Bahkali AH et al. (2017) New marine fungi from cellulosic substrates and a new combination. Botanica Marina (In press).
Johnson RG, Jones EBG, Moss ST. (1987) Taxonomic studies of the Halosphaeriaceae: Ceriosporopsis, Haligena and Appendichordella gen. nov. Canadian Journal of Botany 65: 931-942.
Jones EBG. (1994) Fungal adhesion. Mycological Research 98: 961-981.
Jones EBG, Suetrong S, Sakayaroj J, Bahkali AH, Abdel-Wahab MA, Boekhout T, Pang KL (2015) Classification of marine Ascomycota, Basidiomycota, Blastocladiomycota and Chytridiomycota. Fungal Diversity 73: 1-72.
Maharachchikumbura SSN, Hyde KD, Jones EBG, Mckenzie EHC, Huang SK, Abdel-Wahab MA et al. (2015) Towards a natural classification and backbone tree for Sordariomcyetes. Fungal Diversity 72: 199-299.
Réblová M, Seifert KA, Fournier J, Štěpánek V (2016) Newly recognised lineages of perithecial ascomycetes: the new orders Conioscyphales and Pleurotheciales. Persoonia 37: 57–81.
Sakayaroj J, Pang KL, Jones EBG (2011). Multi-gene phylogeny of the Halosphaeriaceae: its ordinal status, relationships between genera and morphological character evolution. Fungal Diversity 46: 87-109.
Key to Ceriosporopsis species:
- Ascospores with equatorial appendages C. caduca
- Ascospores lacking equatorial appendages 2
- Polar appendages > 750 µm C. capillacea
- Polar appendages < 750 µm 3
- Ascospores 15–24 × 5–7.5 µm C. minuta
- Ascospores 13-28 x 6-12 µm C. intricata
- Ascospores 22.5-26 x 8-10 µm C. halima
- Ascospores 29—31.5 x 10.5-14.5 µm C. cambrensis
Image: Ceriosporopsis halima. (a) Section of superficial, ellipsoidal ascoma. (b) Ostiolar canal filled with pseudoparenchymatous cells. (c) One-layered peridium, composed of elongated cells. (d) Clavate, deliquescing asci. (e) Ascospore with bipolar appendages emerging through a gelatinous sheath. Scale bar: a=50 μm; b, c, e=10 μm; d=30 μm. Photo reproduced with the permission of the National Taiwan Ocean University.