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Page number:63 
Remarks (internal):Ceratocystis fimbriata originally was named by Ellis and Halsted (Halsted 1890), but a more detailed description was given by Halsted and Fairchild (1891). A specimen (BPI 595869) deposited by Halsted in 1890 should serve as the holotype. However, this specimen is now crumbled powder and useless as a type specimen. Halsted deposited another sweet potato specimen in 1891 (BPI 595863) with pictures from the Halsted and Fairchild (1891) description. This specimen consists of infected sweet potato shoots and includes mature perithecia and is designated here as the neotype. It fits into the morphological description of C. fimbriata sensu stricto given above.
As reviewed by Baker et al (2003), only isolates of C. fimbriata from sweet potato have been found to be pathogenic to sweet potato in inoculation studies. Fourteen isolates and specimens from diseased sweet potato plants in China, Japan, Papua New Guinea, New Zealand, St. Vincent and the USA have nearly identical ITS-rDNA sequences (AY157956 [GenBank] , AY157957 [GenBank] ). This sequence has differed from those of more than 280 isolates and specimens of C. fimbriata from other hosts (Baker et a 2003, Barnes et al 2001, Barnes et al 2001, unpublished data), including those of Colombian coffee isolates (Marin et al 2003). Microsatellite analyses (Barnes et al 2001, Steimel et al 2004) also have shown C. fimbriata from sweet potato to be nearly uniform and distinct from isolates derived from sycamore, cacao and other hosts.
 
Description type:Non-original description 
Description:Ceratocystis fimbriata sensu stricto Ellis et Halsted, New Jersey Agricultural College Experiment Station Bulletin 76, 1890, p. 14. Figs. 1, 2
Description. - Perithecia superficial or embedded in the substrate, bases dark brown to black, globose, 110-250 µm wide, 120-250 µm tall. Necks dark brown to black, straight, 440-770 µm long, 28-40 µm wide at the base and 16-24 µm wide at the tip. Ostiolar hyphae divergent, light brown to hyaline, non-septate, smooth-walled, 20-120 µm long. Asci not seen. Ascospores hyaline, one-celled, galeate, 5.0-7.5 µm long x 3.5-5.0 µm wide, 3.0-4.5 µm tall, spores accumulating in a cream colored mass at the tip of the neck.
Endoconidiophores arising laterally from vegetative hyphae, scattered or arising in clusters, 1-8 septate, 55-120 µm long, 3.0-8.0 µm wide at the base. Phialides lageniform, 27-60 µm long, 4.0-8.5 µm wide at the middle, 3.0-6.0 µm wide at the tip, hyaline to pale brown. Endoconidia unicellular, hyaline to light brown, smooth, cylindrical with flattened ends, straight, biguttulate, 9-33 x 3.0-5.0 µm, borne in chains of variable length. Doliform endoconidia absent. Aleurioconidiophores arising laterally from the mycelium, with 0-5 septa, 9-98 x 4.5-6.5 µm. Aleurioconidia brown, globose to pyriform, 11-16 x 6.5-12 µm, occurring singly or in short chains.
Specimen examined. - USA. New Jersey: Swedesboro, from Ipomoea batatas, 12 April 1891, col. B. D. Halsted (neotype; BPI 595863).
 
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