vermisporus

Bathyascus Kohlm., 1977. Rev. Mycol., 41: 191.

Type species:

Bathyascus vermisporus Kohlm., 1977. Rev. Mycol., 41: 191.

Sexual morph. Saprobic, Ascomata; 150-260 µm high (including necks), 215-480 µm in diam., solitary, subglobose or ellipsoidal, partly or completely immersed, ostiolate, papillate, coriaceous, dark brown above, light brown to almost hyaline at the base. Peridium: 40-45 µm thick around the ostiole, 20-30 um at the base and sides, composed of 5 or 6 layers of thin-walled, polygonal, elongated cells with large lumina, forming a textura angularis, mearging into the pseudoparenchyma of the centrum. Necks: 60-380 µm long, 60-70 µm in diam., cylindrical or obtusely conical, dark brown; ostiolar canal about 15 µm in diam., periphyses absent; walls of some necks extend into lumina of wood vessels and, thus, appear warty. Catenophyses: absent, center of immature ascomata filled with hyaline, thin-walled pseudoparenchymatous cells that become compressed by the developing asci. Asci: 70-80 x 12-14 µm, 8-spored, fusiform to clavate, unitunicate, thin-walled, early deliquescing, maturing simultaneously on a small-celled ascogenous tissue at the base of the ascomata venter. Ascospores: 50-72 x 4-5.5 µm, filiform, or rarely elongate fusoid, straight or curved, attenuate, thick-walled, non-septate, hyaline, without appendages. Asexual morph: Undetermined (Description based on Kohlmeyer (1977), and Borse et al. (2012)).

Key to species of Bathyascus:

1. Ascospores 1-septate, 70-100 x 8-9 µm                                    B. tropicalis

1. Ascospores non-septate                                                           2

2. A deep sea species, 50-72 x 4-6 µm,                                        B. vermisporus 

2. Intertidal species                                                                    3

3. Ascospores 90-145 x 2.5-4 µm                                                B. avicenniae  

3. Ascospores 205-300 x 9-15 µm                                               B. grandisporus

3. Ascospores 125-160 x 2.5-5 µm                                              B. mangrovei

Key references:

Hyde KD, Jones EBG (1987) Marine fungi from Seychelles. VII. Bathyascus grandisporus sp. nov. from mangrove wood. Bot. Mar. 30: 413 416.

Jones EBG, Chatmala I, Pang KL (2006) Two new genera isolated from marine habitats in Thailand: Pseudolignincola and Thalespora (Halosphaeriales, Ascomycota). Nova Hedwigia 83: 219-232.

Kohlmeyer J (1980) Tropical and subtropical filamentous fungi of the Western Atlantic Ocean. Botanica Marina. 23(8):529-544.

Ravikumar DR, Vittal BPR (1991) A new species of Bathyascus from Indian mangroves. Mycological Research. 95(3):370-371.