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Pleosporales - CBS - KNAW

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Fungal Diversity<br />

minute, unilocular, setose pseudothecia with 2–3 wall<br />

layers; brown, fusoid, 1-septate ascospores, and an anamorphic<br />

stage (Phoma muscivora M.L. Davey & Currah)<br />

(Davey and Currah 2009). Based on an ITS rDNA<br />

sequences analysis, Atradidymella nested within Didymellaceae<br />

(Davey and Currah 2009).<br />

Bertiella (Sacc.) Sacc. & P. Syd., in Saccardo, Syll. fung.<br />

(Abellini) 14: 19 (1899).<br />

≡ Bertia subgen. Bertiella Sacc., Syll. fung. (Abellini) 1:<br />

584 (1882).<br />

Type species: Bertiella macrospora (Sacc.) Sacc. &<br />

Traverso, Syll. fung. (Abellini) 19: 147 (1910).<br />

≡ Bertia macrospora Sacc., Michelia 1(no. 8): 452 (1882).<br />

Bertia subg. Bertiella was raised to generic rank by Saccardo<br />

(1899), and is typified by B. macrospora. After studying the<br />

type specimen of B. macrospora, Eriksson and Yue (1986)<br />

assigned it to Massarina (as M. macrospora (Sacc.) O.E. Erikss.<br />

& J.Z. Yue). Concurrently, Bertiella is treated as a synonym of<br />

Massarina. Hydeetal.(2002) assigned Bertia macrospora to<br />

Lophiostoma as (L. bertiellum Aptroot & K.D. Hyde).<br />

The superficial ascomata, cylindro-clavate asci and<br />

hyaline 1-septate ascospores which may become 3-septate<br />

and pale brown when senescent and, in particular, the<br />

woody habitat indicate that B. macrospora may be related<br />

to Lophiostoma sensu Holm and Holm (1988). A single<br />

isolate of Bertiella macrospora clusters with Byssosphaeria<br />

in the Melanommataceae in a recent DNA based phylogeny<br />

(Mugambi and Huhndorf 2009b). The relationship between<br />

Bertiella and Byssosphaeria needs further study.<br />

Byssothecium Fuckel, Bot. Ztg. 19: 251 (1861).<br />

Type species: Byssothecium circinans Fuckel, Bot. Ztg.<br />

19: 251 (1861).<br />

The isotype of Byssothecium circinans is in FH as<br />

exiccatae (Fungi rhenani 730c); it was described by Boise<br />

(1983) and could not be loaned. Byssothecium circinans is<br />

regarded as a saprobe or weak parasite of Medicago sativa<br />

(Semeniuk 1983), and a Pleospora-type centrum was<br />

observed (Boise 1983). A Chaetophoma-like anamorph<br />

was produced in culture, however, no culture or herbarium<br />

specimen is listed (Boise 1983). Boise (1983) regarded<br />

Byssothecium circinans as closely related to Teichospora,<br />

however, confirmation is required. An isolate of Byssothecium<br />

circinans was sequenced and a multigene phylogeny<br />

placed it in close proximity to members of Massarinaceae<br />

(Schoch et al. 2009; Zhang et al. 2009a; Plate 1).<br />

Caryospora De Not., Micr. Ital. Novi 9: 7 (1855).<br />

Type species: Caryospora putaminum (Schwein.) De Not.,<br />

Micr. Ital., Dec. 9: 7 (1855).<br />

After studying the Caryospora species in North America,<br />

Barr (1979b) indicated that species of Caryospora may<br />

closely relate to Trematosphaeria. Boise (1985) distinguished<br />

Caryospora from Trematosphaeria based on the<br />

structure of ascospores. Currently, 17 taxa, from freshwater,<br />

marine, or terrestrial habitats (Raja and Shearer 2008), are<br />

included within Caryospora and might be polyphyletic.<br />

Celtidia J.D. Janse, Ann. Jard. Bot. Buitenzorg 14: 202 (1897).<br />

Type species: Celtidia duplicispora J.D. Janse, Ann. Jard.<br />

Bot. Buitenzorg 14: 202 (1897).<br />

Celtidia is a monotypic genus, which is characterized by<br />

its echinulate ascospores (Hawksworth 1979). It is only<br />

known from an illustration accompanying the original<br />

description from root nodules of Celtis in Java. A new<br />

collection is needed for further study of this genus.<br />

Chaetopreussia Locq.-Lin., Revue Mycol., Paris 41: 185<br />

(1977).<br />

Type species: Chaetopreussia chadefaudii Locq.-Lin.,<br />

Revue Mycol., Paris 41: 187 (1977).<br />

Chaetopreussia is a monotypic genus characterized by<br />

cleistothecioid ascomata with seta, and 3-septate ascospores<br />

without germ slits. Recent molecular analysis has shown that<br />

cleistothecioid ascomata and the presence of germ slits lack<br />

significance at the generic rank (Kruys and Wedin 2009).<br />

Chaetopreussia is possibly another synonym of Preussia.<br />

Clathrospora Rabenh., Hedwigia 1(18): 116 (1857).<br />

Type species: Clathrospora elynae Rabenh., Hedwigia 1:<br />

116 (1857).<br />

The most striking character of Clathrospora is its<br />

ascomata opening with an intraepidermal discoid lid and<br />

muriform applanate ascospores with more than one row of<br />

longitudinal septa (Shoemaker and Babcock 1992). The<br />

form of opening and applanate ascospores, however, might<br />

have limited significance at generic rank and thus,<br />

Clathrospora may be closely related to Pleosporaceae.<br />

Phylogenetic analysis based on nLSU, nSSU and mtSSU<br />

indicate that C. diplospora (Ellis & Everh.) Sacc. &<br />

Traverso nests in Pleosporaceae (Kruys et al. 2006).<br />

Clathrospora elynae is saprobic on monocots (Shoemaker<br />

and Babcock 1992).<br />

Cochliobolus Drechsler, Phytopathology 24: 973 (1934).<br />

Type species: Cochliobolus heterostrophus (Drechsler)<br />

Drechsler, Phytopathology 24: 973 (1934).<br />

Cochliobolus and its asexual relatives are well studied<br />

taxa in <strong>Pleosporales</strong> because of their economic importance.<br />

Cochliobolus includes both saprobic and pathogenic species<br />

that are significant monocot pathogens worldwide, which<br />

attack corn, rice, barley, sugarcane, wheat, and oats, all<br />

major cereal crops. Cochliobolus is characterized by globose<br />

or subglobose ascomata with a well defined long ostiolar<br />

papilla or cylindrical neck, a peridium composed of

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