''Rostraureum tropicale'' is a species of fungus from genus ''

Rostraureum ''Rostraureum'' is a genus of fungi in the family Cryphonectriaceae Cryphonectriaceae is a family of fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts ...

'' that is found in Ecuador.

Distribution and habitat

''Rostraureum tropicale'' is a pathogen of '' Terminalia ivorensis'' and causes

basal Basal or basilar is a term meaning ''base'', ''bottom'', or ''minimum''. Science * Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure * Basal (medicine), a minimal level that is nec ...

stem

cankers A plant canker is a small area of dead tissue, which grows slowly, often over years. Some cankers are of only minor consequence, but others are ultimately lethal and therefore can have major economic implications for agriculture and horticultur ...

on dying trees. The fungus is distributed in the lowland tropics of Ecuador. Hosts include '' Terminalia ivorensis'' and '' Terminalia superba'' (both in family '' Combretaceae'' of the ''

Myrtales The Myrtales are an order of flowering plants placed as a sister to the eurosids II clade as of the publishing of the ''Eucalyptus grandis'' genome in June 2014. The APG III system of classification for angiosperms still places it within the eur ...

'').

Morphology

Morphologically, ''Rostraureum tropicale'' has characteristics similar to those for ''

Cryphonectria ''Cryphonectria'' is a fungal genus in the order Diaporthales. The most well-known and well-studied species in the genus is '' Cryphonectria parasitica'', the species which causes chestnut blight. The genus was, for a time, considered synonymous ...

'', ''

Endothia ''Endothia'' is a genus of fungi within the family Cryphonectriaceae Cryphonectriaceae is a family of fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts ...

'' and ''

Chrysoporthe ''Chrysoporthe'' is a genus of fungi in the family Cryphonectriaceae Cryphonectriaceae is a family of fungi A fungus ( : fungi or funguses) is any member of the group of eukaryotic organisms that includes microorganisms such as yeasts ...

'', but appears to be superficially closest to '' Cryphonectria longirostris''. The fungus displays characteristics typical of diaporthalean fungi, with periphysate ostiolar canals with no

paraphyses Paraphyses are erect sterile filament-like support structures occurring among the reproductive apparatuses of fungi, ferns, bryophytes and some thallophytes. The singular form of the word is paraphysis. In certain fungi, they are part of the fe ...

, and

asci ASCI or Asci may refer to: * Advertising Standards Council of India * Asci, the plural of ascus, in fungal anatomy * Accelerated Strategic Computing Initiative * American Society for Clinical Investigation * Argus Sour Crude Index * Association of ...

are

unitunicate An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or ...

with refractive apical rings. Fruiting structures are orange to yellow, and

ascospores An ascus (; ) is the sexual spore-bearing cell produced in ascomycete fungi. Each ascus usually contains eight ascospores (or octad), produced by meiosis followed, in most species, by a mitotic cell division. However, asci in some genera or ...

are one- septate and

fusoid Fusiform means having a spindle-like shape that is wide in the middle and tapers at both ends. It is similar to the lemon-shape, but often implies a focal broadening of a structure that continues from one or both ends, such as an aneurysm on a b ...

ellipsoid An ellipsoid is a surface that may be obtained from a sphere by deforming it by means of directional scalings, or more generally, of an affine transformation. An ellipsoid is a quadric surface; that is, a surface that may be defined as the ...

. ''Rostraureum tropicale'' can be distinguished from ''

'', ''

'' and ''

'' by the observation that perithecial necks are not embedded in well-developed stromatic tissue. Additionally, it can be distinguished from ''Chrysoporthe'' by the presence of orange perithecial necks instead of

fuscous {{Short pages monitor