Calcarisporium cordycipiticola Jing Z. Sun, Cai H. Dong, Xing Z. Liu & K.D. Hyde, 2016

Sun, Jing-Zu, Dong, Cai-Hong, Liu, Xing-Zhong, Liu, Jian-Kui & Hyde, Kevin D., 2016, Calcarisporium cordycipiticola sp. nov., an important fungal pathogen of Cordyceps militaris, Phytotaxa 268 (2), pp. 135-144 : 139-141

Calcarisporium cordycipiticola Jing Z. Sun, Cai H. Dong, Xing Z. Liu & K.D. Hyde , sp. nov.

Figs. 2–3

Index Fungorum number: IF551382

Faces of Fungi number: FoF 00753

Etymology. cordycipiticola , the stem cordycipit- refers the host fungus Cordycpes militaris , the ending - cola means “dweller, inhabit”.

Parasitic with white mycelium forming a cottony layer on the stromata of Cordyceps militaris . Colonies on PDA reaching 18–22 mm diam. at 20 °C after 10 days. Hyphae 2–3 μm wide. Conidiophores 18–70 × 1–3 μm, erect, hyaline, verticillate, with 1–5 verticils, each verticil with 1–15 conidiogenous cells. Conidiogenous cells 15–70 × 1.2–3 μm, gradually tapering near the apex, conidiogenous denticles 2–2.5 μm long. Conidia 3–5 × 1.5–2.5 μm, holoblastic, unicellular, hyaline, smooth-walled, thin-walled, ovoid, navicular or fusiform, base acuminate.

Holotype. CHINA. Beijing: on fruiting body of Cordyceps militaris , 28 June 2014, Cai-Hong Dong , HMAS

253931, ex-type living culture at CGMCC 3.17905, MFLUCC 15-0686.

Other material examined. CHINA. Shanghai: on fruiting body of C. militaris , 11 Sep. 2012, Xing-Zhong Liu, HMAS 253930 , CGMCC 3.17904 , MFLUCC 15-0685 ;

Notes. Calcarisporium cordycipiticola grows on the young and mature fruiting bodies of Cordyceps militaris . It can be distinguished from the known species of the genus by morphology and phylogeny. It has similar sized conidia to C. arbuscula (4–6 × 1.7–2 μm) and C. ovalisporum (3–5 × 1.2–1.8 μm). However, the length/width ratio of conidia of the new species is lower than that of the above species, and C. cordycipiticola grows more slowly on PDA at 20 °C.

Figures

FIGURE 2. Calcarisporium cordycipiticola (Holotype HMAS 253931) a, b. Calcarisporium cordycipiticola on a fruiting body of Cordyceps militaris. c. Colony of Calcarisporium cordycipiticola; d, e. Conidiophore with and without conidia; f. Conidia. Bars: b = 5 mm; c =1000 mm; d, e, f = 10 μm.

FIGURE 3. Calcarisporium cordycipiticola (ex-type CGMCC 3.17905, MFLUCC 15-0686) a. Surface (left) and reverse (right) of colony of Calcarisporium cordycipiticola on PDA medium 10 days at 20 °C. b, c, d, e, f, g. Conidiophores with conidia; h. i. Conidia. Bars: b, c, d, e, f, g = 10 μm; h, i = 5 μm.