Then in 1977, it was thought to be a synonym of
Seimatosporium (another fungi in the
Sporocadaceae family) in Mycol. Pap. 141 Then in 1978, the fungal generic names of
Allelochaeta,
Basilocula,
Ceuthosira,
Pycnidiochaeta, and
Xenodomus were found to be redundant.
Allelochaeta and the single species of
Allelochaeta gaubae was reduced to synonymy with
Seimatosporium and
Seimatosporium dilophosporum, respectively.
Basilocula,
Ceuthosira, and
Xenodomus were then treated as synonyms of
Coleophoma with species
Coleophoma lauricola,
Coleophoma aesculi, and
Coleophoma taxi proposed as new combinations. The names
Microgloeum and
Microgloeum pruni were shown to be applicable to a microconidial state associated with
Cylindrosporium padi. The generic name
Neobarclaya is revived to accommodate
Neobarclaya primaria and was segregated from
Polynema in which
Polynema ornatum and
Polynema radiatum comb. nov. were then accepted.
Pycnidiochaeta and its type species,
Pycnidiochaeta biciliata, are reduced to synonymy with
Dinemasporium and
Dinemasporium gramineum, respectively. In 2018, the appendaged coelomycete genus of
Seimatosporium (
Sporocadaceae, Sordariomycetes) and some of its purported synonyms
Allelochaeta,
Diploceras and
Vermisporium are re-evaluated. Based on
DNA data for five loci (ITS, LSU, rpb2, tub2 and tef1),
Seimatosporium was found to be
paraphyletic. The ex-type species of
Allelochaeta,
Discostromopsis and
Vermisporium represent a distinct sister clade to which the oldest name
Allelochaeta was then used. These genera were traditionally separated based on a combination of conidial pigmentation,
septation (having a septum or dividing wall), and the nature of their conidial appendages.
Allelochaeta was found to include taxa with both branched or solitary appendages, that could be cellular or continuous, with conidia being (2-)3(-5)-septate,
hyaline, or pigmented, concolorous or versicolorous. These differences suggests that these characters should be applied at species, and not at the generic level. Conidial pigmentation appears to have been lost or gained several times during the evolution of species within
Allelochaeta. ==Hosts==