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Roberts, Rodney G. Two new Alternaria species from pear fruit. Mycotaxon 100: 159–167.  2007.

ABSTRACT: Two new taxa in Alternaria are here described as A. calycipyricola from the calyces of fruits of Pyrus communis ‘d’Anjou’ grown in Washington State, and A. ventricosa from the stem of a fruit of Pyrus bretschneideri ‘Ya Li’ grown in Hebei, China. Conidia of both species are fundamentally erostrate but may produce elongate apical secondary conidiophores from which chain elongation and lateral branching occur late in the development of individual conidia. A. calycipyricola and A. ventricosa differ from each other in cultural characters, growth rate, and conidial morphology. Combined analyses of RAPD, RAMS and AFLP fingerprints support morphological evidence that A. calycipyricola and A. ventricosa are appropriately placed in the A. infectoria species-group sensu Simmons and are distinct from each other and the other species studied within the group.

KEYWORDS:  Alternaria alternata

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