Mycological Progress

, Volume 3, Issue 4, pp 275–290 | Cite as

The coelomycetous genera Chaetomella and Pilidium represent a newly discovered lineage of inoperculate discomycetes

  • Amy Y. RossmanEmail author
  • M. Cathie Aime
  • David F. Farr
  • Lisa A. Castlebury
  • Kristin R. Peterson
  • Robert Leahy


The coelomycetous genera Chaetomella and Pilidium were determined to be closely related to each other, yet are recognized as distinct genera based on both morphological observations and rDNA sequence analyses. Analyses of the SSU and LSU of the nuclear ribosomal RNA genes suggest that Chaetomella and Pilidium along with Sphaerographium tenuirostrum and Synchaetomella lunatospora constitute a distinct lineage within the ascomycetes that is allied with the Leotiomycetes. Chaetomella and Pilidium both produce black pycnidia generally opening by a raphe, acropleurogenous conidiogenous cells, and non-septate, hyaline, usually fusiform to falcate, rarely ellipsoid, conidia. Pycnidia of Pilidium are smooth while those of Chaetomella have setae of various types. A Hainesia sporodochial synanamorph was observed in cultures of C. oblonga and C. raphigera similar to H. lythri, the synanamorph of P. concavum. Specimens of C. oblonga, type species of Chaetomella, C. acutiseta, C. circinoseta, C. raphigera, Pilidium acerinum, type species of Pilidium, and P. concavum were examined. Diagnoses and illustrations are provided for these species along with a key to the accepted species in both genera.


Sequence Analysis Type Species rDNA Sequence Morphological Observation Distinct Genus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Alfieri JR SA, Langdon KR, Wehlburg C, Kimbrough JW (1984) Index of Plant Diseases in Florida. Florida Department. of Agriculture & Consumer Services, Division of Plant Industry. — Bulletin No. 11 (Revised).Google Scholar
  2. Crous PW, Knox-Davies PS, Wingfield MJ (1989) A list of Eucalyptus leaf fungi and their potential importance to South African Forestry. — South African Forestry Journal 149: 17–29.Google Scholar
  3. Crous PW (1991) Two newly reported leaf pathogens of Eucalyptus grandis in South Africa. — South African Forestry Journal 157: 12–15.Google Scholar
  4. Dennis RWG (1986) Fungi of the Hebrides. — Royal Botanic Gardens, Kew.Google Scholar
  5. Dicosmo F, Cole GT (1980) Morphogenesis of conidiomata in Chaetomella acutiseta (Coelomycetes). — Canadian Journal of Botany 58: 1129–1137.Google Scholar
  6. Farr DF, Rossman AY, Palm ME, McCray EB (2004) Fungal Databases, Systematic Botany & Mycology Laboratory, ARS, USDA. Retrieved February 26, 2004, from
  7. Gernandt DS, Platt JL, Stone JK, Spatafora JW, Holst-Jensen A, Hamelin RC, Kohn LM (2001) Phylogenetics of Helotiales and Rhytismatales based on partial small subunit nuclear ribosomal DNA sequences. — Mycologia 93: 915–933.Google Scholar
  8. Ginns JH (1986) Compendium of Plant Disease and Decay Fungi in Canada 1960–1980. — Research Branch of Canada Agriculture Publications 1813: 1–416Google Scholar
  9. Hambleton S, Tsuneda A, Currah RS (2003) Comparative morphology and phylogenetic placement of two microsclerotial black fungi from Sphagnum. — Mycologia 95: 959–975.Google Scholar
  10. Höhnel F von (1915) Über Chaetomella atra Fuck. — Sitzungsberichte der Akademie der Wissenschaften in Wien 124: 114.Google Scholar
  11. Kirk PM, Cannon PF, David JC, Stalpers JA (2001) Ainsworth & Bisby’s Dictionary of the Fungi. 9th Ed., Wallingford, UK: CAB International.Google Scholar
  12. Kirk PM, Spooner BM (1984) An account of the fungi of Arran, Gigha and Kintyre. — Kew Bulletin 38: 503–597Google Scholar
  13. Kunze G, Schmidt JC (1823) — Mycologische Hefte. Vol. 2.Google Scholar
  14. Maas JL (ed.) (1998) Compendium of Strawberry Diseases. American Phytopathological Society, St. Paul, Minnesota.Google Scholar
  15. Mathur RS (1979) The Coelomycetes of India. Bishen Singh Mahendra Pal Singh, India.Google Scholar
  16. Melink VA, Popushoi IS (1992) [Imperfect fungi on species of trees and shrubs (U.S.S.R.)]. Akademiia nauk Respubliki Moldova. Institute fiziologii rastenii, Kishinev.Google Scholar
  17. Mendes MAS, Dasilva VL, Dianese JC (1998) Fungos em Plants no Brasil. Embrapa-SPI/Embrapa-Cenargen, Brasilia.Google Scholar
  18. Palm ME (1991) Taxonomy and morphology of the synanamorphs Pilidium concavum and Hainesia lythri (coelomycetes). — Mycologia 83: 787–796.Google Scholar
  19. Raabe RD, Conners IL, Martinez AP (1981) Checklist of Plant Diseases in Hawaii. College of Tropical Agriculture and Human Resources, University of Hawaii. — Information Text Series No. 22.Google Scholar
  20. Rama Rao P (1963) A new species of Chaetomella from soil. — Mycopathologia 19: 255–256.Google Scholar
  21. Rambaut A (1996–2002) Se-Al. Version 2.0all. Department of Zoology, University of Oxford, Oxford, United Kingdom.Google Scholar
  22. Rayner RW (1970) A Mycological Colour Chart. Commonwealth Mycological Institute and British Mycological Society, Kew, Surrey, England.Google Scholar
  23. Routien JB (1957) Fungi isolated from soils. — Mycologia 49: 188–196.Google Scholar
  24. Saccardo PA (1884) — Sylloge Fungorum 3: 332.Google Scholar
  25. Shear CL, Dodge BO (1921) The life history and identity of Patellina fragariae, Leptothryrium macrothecium, and Peziza oenotherae. — Mycologia 13: 135–170.Google Scholar
  26. Singh HB, Johri JK, Singh M, Singh A, Tripathi A, Singh SP (1999) A new leaf spot disease of Cuphea spp. caused by Chaetomella raphigera. — Bulletin OEPP 29: 213–214.Google Scholar
  27. Smith AL, Ramsbottom J (1917) New or rare microfungi. — Transactions of the British Mycological Society 6: 47–53.Google Scholar
  28. Stolk AC (1963) The genus Chaetomella Fuckel. — Transactions of the British Mycological Society 46: 409–425.Google Scholar
  29. Strimmer K, von Haeseler A (1996) Quartet puzzling: a quartet maximum-likelihood method for reconstructing tree topologies. — Molecular Biology and Evolution 13: 964–969.Google Scholar
  30. Sutton BC (1980) The Coelomycetes. Fungi Imperfecti with Pycnidia, Acervuli and Stromata. Commonwealth Mycological Institute, Kew, Surrey, England.Google Scholar
  31. Sutton BC (1991) Notes on Deuteromycetes III. — Sydowia 43: 264–280.Google Scholar
  32. Sutton BC, Gibson IAS (1977) Pezizella oenotherae. CMI Descriptions of Pathogenic Fungi and Bacteria. No. 535.Google Scholar
  33. Sutton BC, Sarbhoy AK (1976) Revision of Chaetomella and comments upon Vermiculariopsis and Thyriochaetum. — Transactions of the British Mycological Society 66: 297–303.Google Scholar
  34. Swift ME (1930) A new species of Chaetomella on rose. — Mycologia 22: 165–168.Google Scholar
  35. Swofford DL (2002) PAUP*: Phylogenetic analysis using parsimony (*and other methods). Verson 4.10beta. Sinauer Associates, Inc, Sunderland, MA.Google Scholar
  36. Verkley GJM (2001) On Sphaerographium petiolicola and a new species, S. tenuirostrum, taxa from a rarely collected genus of coelomycetes. — Mycologia 93: 205–211.Google Scholar
  37. Verkley GJM (2002) A revision of the genus Sphaerographium and the taxa assigned to Rhynchophoma (anamorphic Ascomycetes). — Nova Hedwigia 75: 433–450.CrossRefGoogle Scholar
  38. Vilgalys R, Hester M (1990) Rapid genetic identification and mapping enzymatically amplified ribosmal DNA from several Cryptococcus species. — Journal of Bacteriology 172: 4238–4246.PubMedGoogle Scholar
  39. Wang CJK, Zabel RA (1990) Identification Manual for Fungi from utility poles in the eastern United States. American Type Culture Collection, Rockville, MD.Google Scholar
  40. White TJ, Bruns T, Lee S, Taylor J (1990) Amplification and direct sequencing of fungal ribosomal RNA genes for phylogenetics. Pp 315–322 in: PCR Protocols: A Guide to Methods and Applications. Eds. Innis MA, Gelfand DH, Sninsky JJ, White TJ. Academic Press, San Diego, CA.Google Scholar

Copyright information

© DGfM 2004

Authors and Affiliations

  • Amy Y. Rossman
    • 1
    Email author
  • M. Cathie Aime
    • 1
  • David F. Farr
    • 1
  • Lisa A. Castlebury
    • 1
  • Kristin R. Peterson
    • 2
  • Robert Leahy
    • 3
  1. 1.Systematic Botany and Mycology LabUSDA/ARSBeltsville
  2. 2.Farlow HerbariumHarvard UniversityCambridge
  3. 3.Florida Department of Agriculture and Consumer ServicesGainesville

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