Cryptosphaeria ligniota (Fr.) Auersw.

Vasilyeva, Larissa & Ma, Haixia, 2014, Diatrypaceous fungi in north-eastern China. 1. Cryptosphaeria and Diatrype, Phytotaxa 186 (5), pp. 261-270 : 262

Cryptosphaeria ligniota (Fr.) Auersw. , in Rabenhorst, Fungi europ. exsicc.: no. 1269. 1869. ( Figs. 4 , 15 )

Specimens examined:— CHINA. Heilongjiang Province: Xingkaihu Nature Reserve, on dead branches of Populus tremula , 1 September 2003, L. Vasilyeva, VLA P-1478; Jilin Province: Changbai Mountain National Nature Reserve, Dayangcha area, on dead branches of Populus tremula , 4 August 2008, L. Vasilyeva, VLA P-2185; vicinity of The Red Leaves Valley of Jiaohe, Ai-Lin forest farm, on dead branches of Populus tremula , 30 August 2013, L. Vasilyeva, VLA P-2813.

Stromata immersed in bark remaining unchanged or slightly inflated, irregular, widely effused or spot-shaped, surrounded by a black line deeply in the back, recognized by small and black dots of integrate ostioles scattered on the surface; perithecia monostichous or distichous, scattered or aggregated, singly erumpent, 250–300 µm diam. Asci cylindrical, paraphysate, 25–35 × 7–9 µm in spore bearing part, stalks of different length, containing 8 biseriate or conglobate ascospores, apical ring tiny and non-amyloid. Ascospores one-celled, allantoid, slightly greenish, 8–12 × 2–2.5 µm.

In the north-eastern Asia, this species seems to be restricted to Populus tremula , whereas it is replaced by C. nigrescens on other Populus species.

Figures

FIGURES. 1–5. Surface of stromata of Cryptosphaeria species: 1. C. exornata. 2. C. eunomia. 3. C. nigrescens. 4. C. ligniota. 5. C.venusta. Scale bars: 1 = 1,4 mm; 2–5 = 1 mm.

FIGURES. 14–22. Ascospores Cryptosphaeria and Diatrype species: 14. C. exornata. 15. C. ligniota. 16. C. nigrescens. 17. C. venusta. 18. D. hypoxyloides. 19. D. platystoma. 20. D. stigma. 21. D. subundulata. 22. D. undulata. Scale bars: 14, 15, 20 = 3.5 µm, 16, 18, 21, 22 = 4 µm, 19 = 5 µm, 17 = 6 µm.