Heiomasia, a new genus in the lichen-forming family Graphidaceae (Ascomycota: Lecanoromycetes: Ostropales) with disjunct distribution in Southeastern North America and Southeast Asia

Matthew P. Nelsen; Robert Lücking; Eimy Rivas Plata; Joelle S. Mbatchou

doi:10.1639/0007-2745-113.4.742

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Matthew P. Nelsen,^1,2 Robert Lücking,^2,* Eimy Rivas Plata,³ Joelle S. Mbatchou⁴

¹1Committee on Evolutionary Biology, University of Chicago, 1025 E. 57th Street, Chicago, Illinois 60
²2Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605-2496,
³3Department of Biological Sciences, University of Illinois-Chicago, 845 West Taylor Street (MC 066),
⁴4Department of Biological Sciences, DePaul University, 1 E. Jackson Street, Chicago, Illinois 60604,

^*Corresponding author e-mail: rlucking@fieldmuseum.org

Abstract

Heiomasia is a new genus that includes two sterile species producing unique isidia-like structures for vegetative dispersal. Their systematic position was clarified using molecular analysis of the small subunit of the mitochondrial ribosomal DNA (mtSSU). The two species form a strongly supported clade occupying a somewhat isolated position within Graphidaceae s.lat. The new genus is based on H. sipmanii (Aptroot, Lücking & Rivas Plata) Nelsen, Lücking & Rivas Plata comb. nov., a species from Southeast Asia with disc-shaped isidia-like structures, originally described in the genus Herpothallon. The second species, H. seaveyorum Nelsen & Lücking spec. nov., is known only from Florida; it produces robust, sausage-shaped isidia-like structures.

Citation Download Citation

Matthew P. Nelsen, Robert Lücking, Eimy Rivas Plata, and Joelle S. Mbatchou "Heiomasia, a new genus in the lichen-forming family Graphidaceae (Ascomycota: Lecanoromycetes: Ostropales) with disjunct distribution in Southeastern North America and Southeast Asia," The Bryologist 113(4), 742-751, (1 December 2010). https://doi.org/10.1639/0007-2745-113.4.742

Received: 11 January 2010; Accepted: 1 October 2010; Published: 1 December 2010

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