Basionym: Lophistoma triseptatum Peck in Ell. & Ev., N. Am. Pyrenom.: 224. 1892.
Lophiostoma quadrinucleatum var. triseptatum (Peck) P. Karsten et al., Mycol. Pap. 120: 36. 1970.
Description：
Mycelium sparse, superficial, extending into the host tissue at the vicinity of epidermis. Ascomata immersed to subimmersed, subglobose, 330-429 μm wide, 380-468 μm high, scattered, solitary, with a broad, strongly compressed ostiole 117-156 μm wide in long axis. Peridium 16-23 μm wide, composed of 4-6-layers of dark brown, polygonal, thick-walled cells; Peridium near the apex of ascoma is more thickened, widest and 60 μm around the ostiole. Asci 96-145 × 12-15 μm, elliptical to elliptic-clavate, bitunicate, 8-spored, arising basally and peripherally in ascoma, stipitate, stipe up to 36 μm long. Ascospores 16-23 × 6-8 μm, oblong, obtuse or rarely pointed at ends, brown, 3-5-septate, strongly constricted at the middle septum and slightly constricted at other septa, the rounded by minute verrucae.
Specimens：
Taiwan, Nantou County, NCHUPP-2447, Central Cross Road 102k, 22 Dec. 1995, NCHUPP-2447.
Habitat：
On indet. wood.
Distribution：
Asia, North America, Taiwan.
References：
Chen, CY. and Hsieh, WH. 1996; Chesters, CGC and Ann., Bell. 1979.
Provided：
W. H. Hsieh
Note：
Chesters and Bell (1970) state that the separation between Lophiostoma triseptatum Peck (3-Septate) and L. triseptatum var. pleuriseptatum Ell. & Ev. (5-septate) is merely based on number of septa, and these two species and L. pruni Ell. & Ev. are considered to be a small variety of L. quadrinucleatum Karsten. This species examined matches the description of L. trisetatum var. pleuriseptatum that has been the synonym of L. quadrinucleatum Karsten var. triseptatum (Peck) Chesters & Bell.
Phylum：Ascomycota >> Class： Ascomycetes >> Order： Dothideales 
BCRC Number：