''Gerronema'' is a
genus of small- to medium-sized
lignicolous
This glossary of mycology is a list of definitions of terms and concepts relevant to mycology, the study of fungi. Terms in common with other fields, if repeated here, generally focus on their mycology-specific meaning. Related terms can be found ...
agarics with white,
nonamyloid
In mycology a tissue or feature is said to be amyloid if it has a positive amyloid reaction when subjected to a crude chemical test using iodine as an ingredient of either Melzer's reagent or Lugol's solution, producing a blue to blue-black stai ...
,
spores and
decurrent gills.
The genus was
circumscribed
In geometry, the circumscribed circle or circumcircle of a polygon is a circle that passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius.
Not every polyg ...
by American mycologist
Rolf Singer
Rolf Singer (June 23, 1906 – January 18, 1994) was a Germany, German-born mycologist and one of the most important Taxonomy (biology), taxonomists of gilled mushrooms (agarics) in the 20th century.
After receiving his Ph.D. at the University ...
in 1951.
Description
Typically the
cap of the fruit bodies have a shallow to deep central depression, giving the
umbrella-like to funnel-shaped caps the appearance of a belly button, or a belly with a
navel. Similarly shaped agarics are said to be omphalinoid in appearance in reference to a morphologically similar genus, ''
Omphalina
''Omphalina'' is a genus of small agarics with white, nonamyloid, basidiospores and decurrent gills. Typically the cap has a deep central depression giving the umbrella-like to funnel-shaped cap the appearance of a belly button, or a belly with a ...
''. ''Gerronema'' differ from ''Omphalina'' by the absence of incrusting or intraparietal
pigments typical of ''Omphalina'', the occasional occurrence of bright colors, such as yellow or green absent in ''Omphalina'', by the restriction to decay of wood, and by the tough tissues composed of
sarcodimitic hyphae.
Distribution
The species have a primarily
tropical distribution, but also occur in Europe and eastern North America where they fruit during hot muggy, summer weather. One of the most common species in the eastern United States is ''Gerronema strombodes'
https://web.archive.org/web/20071015080552/http://fp.bio.utk.edu/mycology/images/Gerronema_strombodes.ht
Species
,
Index Fungorum lists 55 species in ''Gerronema'':
and a new combination was published in 2019.
*''
G. aconquijense''
*''
G. albidum''
*''
G. albogriseolum''
*''
G. alutaceum''
*''
G. amabile''
*''
G. atrialba''
*''
G. bethlehemicum''
*''
G. brunneum''
*''
G. bryogeton''
*''
G. calongei''
*''
G. candidum''
*''
G. chrysocarpum''
*''
G. chrysocraspedum''
*''
G. cinctum''
*''
G. citrinum''
*''
G. collybiomorphum''
*''
G. corticiphilum''
*''
G. costaricense''
*''
G. cyathiforme''
*''
G. daamsii''
*''
G. daguense''
*''
G. farinolens''
*''
G. fibula''
*''
G. flammeum''
*''
G. glutinipes''
*''
G. hungo''
*''
G. incarnatum''
*''
G. infumatum''
*''
G. josserandii''
*''
G. laccarioides''
*''
G. longipes''
*''
G. majus''
*''
G. mariae''
*''
G. melanomphax''
*''
G. moseri''
*''
G. nemorale''
*''
G. nitriolens''
*''
G. oligophyllum''
*''
G. pantoxanthum''
*''
G. pseudomurale''
*''
G. reclinis''
*''
G. sanguineum''
*''
G. schusteri''
*''
G. sericeum''
*''
G. stevensonii''
*''
G. strombodes''
*''
G. subchrysophyllum''
*''
G. subclavatum''
*''
G. suboreades''
*''
G. subsericellum''
*''
G. sucrense''
*''
G. tenue''
*''
G. theophili''
*''
G. umbilicatum''
*''
G. virgineum''
*''
G. viridilucens'' (bioluminescent)
*''
G. xanthophyllum''
See also
*
List of Agaricales genera
*
List of Marasmiaceae genera
References
External links
*''Gerronema'' (Google Images
{{Taxonbar, from=Q3761254
Marasmiaceae
Agaricales genera
Taxa named by Rolf Singer