Heteroconium tulsiense Rashmi Dubey, 2022

Dubey, Rashmi & Pandey, Amit D., 2022, Heteroconium tulsiense (Antennulariellaceae): a novel microfungus from Sanjay Gandhi National Park, Maharashtra, India, Phytotaxa 536 (2), pp. 190-196 : 192

Heteroconium tulsiense Rashmi Dubey sp. nov. ( Figs 1 , 2 )

Mycobank MB-839843

Etymology:—Named after place of collection, Tulsi Range of Sanjay Gandhi National Park, Maharashtra, India.

Holotype:— INDIA. Maharashtra: Mumbai, Sanjay Gandhi National Park , Tulsi Range , Tiger Reserve areas, on dry twig litter, 22 January 2017, Rashmi Dubey, BSI (WC) 209274 , deposited in herbarium of Botanical Survey of India, Western Regional Centre, Pune, Maharashtra, India .

Description:— Colonies on natural substrate, effuse, hairy. Mycelium superficial and immersed, composed of septate, smooth-walled, dark brown or brown hyphae, 1–2 μm diam. Conidiophores macronematous, mononematous, simple, erect, mostly unbranched but aggregated near the base, straight or slightly flexuous, cylindrical, smooth, thickwalled, 3–9-septate, brown to dark brown, 33–62 × 7–9 μm. Conidiogenous cells monoblastic, terminal, cylindrical, integrated, determinate or percurrent, brown, smooth, truncate at the apex, 5–9 × 5.75–7.0 μm. Conidial secession schizolytic. Conidia holoblastic, acrogenous, blastocatenate in chains of up to four, smooth, obclavate, brown, unevenly pigmented, pale brown ends, rounded at apex, truncate at base, thick-walled, 31–45 × 7.5–8.7 μm, 4–7-septate, slightly constricted at the septa.

Known distribution:— Only known from type locality in the Sanjay Gandhi National Park , Maharashtra, India.

Figures

FIGURE 1. Heteroconium tulsiense sp. nov. A. Host, B. Conidiophores attached to host surface, C. Conidiogenesis, D, E. Conidia in chain of three, F, G. Conidia in chain four, H. Conidia with pale brown ends. Scale bars: B, C, E–G = 20 µm; D, H = 10 µm.

FIGURE 2. SEM Images of Heteroconium tulsiense sp.nov. A. Aggregated conidiophores attached to the host substratum; B. Septation in conidiophores, C, D. Conidialchain having 4 conidia; E. Conidia with narrow apical endand broad truncate base, F. Ends of conidia. Scale bars:A, C, D = 20 µm, B, F = 2 µm, E = 10 µm.