Pleosporales - CBS - KNAW

Fungal Diversity
assigned Entodesmium to Lophiostomataceae. Thehosts
of Entodesmium are restricted to stems of legumes (Barr
1992b; Shoemaker 1984b).
Phylogenetic study
Limited phylogenetic studies indicate that Entodesmium
rude may have affinities to Phaeosphaeriaceae (Liew et al.
2000; Plate 1).
Concluding remarks
Species of Entodesmium share several morphological
characters, such as immersed, papillate ascomata, periphysate
ostioles, pale yellow to light yellowish brown, multiseptate
(≥ 3), narrowly fusoid to filliform ascospores, and
are specific to legumes. All of the above similarities
indicate a close relationship among members of Entodesmium.
We do not agree with Barr (1992b) who assigned
Entodesmium to Lophiostomataceae because the ascomata
are immersed, the papilla are not laterally compressed
and the peridium comprises a single type of cells of
textura angularis. These characters plus multi-septate,
lightly pigmented ascospores, which break up into
partspores and host specificity to legumes support inclusion
in Phaeosphaeriaceae. Entodesmium multiseptatum
(G. Winter) L. Holm and E. niessleanum were originally
described as Leptosphaeria species (Shoemaker 1984b)
indicating their similarity to Phaeosphaeria with which
Leptosphaeria is commonly confused (Shoemaker 1984a;
Shoemaker and Babcock 1989b). Phylogenetic study has
also shown that Entodesmium rude is related to members
of Phaeosphaeriaceae (Liew et al. 2000). Thus we assign
Entodesmium to Phaeosphaeriaceae as a separate genus
until further phylogenetic analysis is carried out on
verified specimens.
Eudarluca Speg., Revta Mus. La Plata 15: 22 (1908).
(?Phaeosphaeriaceae)
Generic description
Habitat terrestrial, parasitic. Ascomata small, solitary,
scattered, immersed to erumpent, subglobose, ostiolate,
papillate. Peridium thin, composed of a few layers cells of
textura prismatica. Hamathecium of dense, cellular pseudoparaphyses,
septate. Asci 8-spored, bitunicate, fissitunicate,
cylindrical to fusoid, with a furcate pedicel.
Ascospores broadly fusoid to fusoid, hyaline to pale yellow,
rarely 1- or 3- septate, mostly 2-septate, constricted at the
primary septum.
Anamorphs reported for genus: Sphaerellopsis (Sivanesan
1984).
Literature: Bayon et al. 2006; Eriksson 1966; Katumoto
1986; Ramakrishnan 1951; Spegazzini 1908.
Type species
Eudarluca australis Speg., Revta Mus. La Plata 15: 22
(1908). (Fig. 31)
Ascomata 160–190 μm high×180–290 μm diam., solitary,
scattered, or in small groups, semi-immersed to erumpent,
subglobose to broadly ellipsoid, wall black, ostiolate, apex
with a short papilla, 40–70 μm broad (Fig. 31a and b).
Peridium