Acta bot. bras. 22(1): 287-299. 2008.
295
Figures 22-43. 22-24. Leucocoprinus fragilissimus (Ravenel) Pat. 22. Basidioma. 23. Basidiospores. 24. Elements of the pileipellis.
25-29. Lepiota elaiophylla Vellinga & Huijser. 25. Basidioma. 26. Basidiospores. 27. Basidia. 28. Cheilocystidia. 29. Elements of the
pileipellis. 30-34. Lepiota erythrosticta (Berk. & Broome) Sacc. 30. Basidioma. 31. Basidiospores. 32. Basidia. 33. Cheilocystidia.
34. Elements of the pileipellis. 35-39. Micropsalliota brunneosperma (Singer) Pegler. 35. Basidioma. 36. Basidiospores. 37. Basidia.
38. Cheilocystidia. 39. Elements of the pileipellis. Scaly bar is 10 mm for the basidiomata and 10 µm for microscopic features.
Wartchow, Putzke & Cavalcanti: Agaricaceae Fr. (Agaricales, Basidiomycota) from areas of Atlantic forest in...
296
Pegler (1977) regarded this species as a synonym of
M. brunneosperma. Singer described the dark-spored
Lepiota brunneosperma as having basidiospores
5.8-6.5×3.7-4.4 µm and large capitate cheilocystidia,
37-45×3.5-5.8 µm (Singer & Digilio 1952).
Our collection has narrower basidiospores than
M. brunneosperma according to Heinemann’s key
(1989); but the size and shape of the cystidia, the thick
wall difficult to discern at the apex of the spores, the
dark colour of the pileus and the squamules of the stipe
all support our determination of the Brazilian material.
Other species of Micropsalliota occur in the
Americas: M. vinaceoumbrinus (A.H. Sm.) Heinem.
from the U.S.A. has broader basidiospores, 6.2-
7.3×4.8-5.4 µm (Smith 1944); M. violaceosquamulosus
(R.E.D. Baker & W.T. Dale) Heinem. from Trinidad
& Tobago has a densely scaly stipe, brown
basidiospores and cylindrical cheilocystidia (Heinemann
1961); M. purpurea Singer from Ecuador has much
smaller basidiospores, 3.5-4.2×2.5 µm (Singer 1978);
M. cinnamomeopalida Singer from Costa Rica
(Singer & Gómez 1982) and similar taxa reported from
India as M. cf. cinnamomeopalida lacks dark purplish
colour on the pileus (Heinemann & Leelavathy 1991);
the basidiospores of M. roseovinacea from Martinique
have a homogeneous wall and cheilocystidia that are
short cylindrical and capitate (Pegler 1983);
M. cardinalis Heinem. from Argentina and
M. pruinosa Heinem. from Rio de Janeiro State,
Brazil, do not have pileus more than 10 mm wide
(Heinemann 1989); M. heinemanniana Guzm.-Dáv.,
from Mexico has pleurocystidia (Guzmán-Dávalos
1992); and M. subalpina Guzm.-Dáv. & Heinem., also
from Mexico, has a slender basidioma and a cream to
chocolate-brown pileus (Guzmán-Dávalos &
Heinemann 1994).
As observed, Micropsalliota has a wide distribution
in tropical and temperate America. Other species have
been recorded for Brazil: M. arginea (Berk. & Broome)
Pegler & Rayner, M. cfr. campestroides (Heinem.)
Heinem. and M. cephalocystis from Paraná State
(Heinemann 1993), and M. roseovinacea from São
Paulo State (Pegler 1997).
Recently, Maia et al. (2002), based on material
deposited in URM, cited “M. roseovinaceus Pegler”
as occurring in our region of interest. However, the
exsiccatum revised (URM 75654) has basidiospores that
are 5.3-7.4×4-4.5 µm, dextrinoid, metachromatic
endosporium, lack a germ pore and are hyaline. In
addition, the pileal surface is neither sulcate nor striate.
Hence, the revised specimen is a typical Leucoagaricus
and is necessary to exclude M. roseovinacea from the
list of species known from Pernambuco.
Acknowledgements
The senior author is grateful to Dr. Leonor C. Maia
for helping and support, Dr. Else C. Vellinga, Dr. Laura
Guzmán-Dávalos for valuable comments about the
manuscript; Dr. Reinhardt Agerer, Dr. Marcel Bon,
Dr. Gastón Guzmán, Dr. Roy E. Halling, Mr. André
A.R. de Meijer and Dr. Vicenzo Migliozzi for sending
literature; Dr. Iuri G. Baseia, Dr. Leif Ryvarden, Dr.
Tatiana B. Gibertoni, Mr. Bruno T. Goto and M.Sc.
Sueli A.G. Soares for helping with the collections. Dr.
Rodham E. Tulloss and Dr. Paul M. Kirk are
acknowledged for English improvement. Thanks also
to M.Sc. Vagner G. Cortez for preparation of the plates.
This work was supported by CNPq.
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