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A monograph of the entomopathogenic genera Hypocrella, Moelleriella, and Samuelsia gen. nov. (Ascomycota, Hypocreales, Clavicipitaceae), and their aschersonia-like anamorphs in the Neotropics.

Chaverri P, Liu M, Hodge KT - Stud. Mycol. (2008)

Bottom Line: Hypocrella s. str. has filiform to long-fusiform ascospores that do not disarticulate and Aschersonia s. str. anamorphs with fusoid conidia.The new genus proposed here, Samuelsia, has filiform to long-fusiform ascospores that do not disarticulate and aschersonia-like anamorphs with small allantoid conidia.In addition, the present study presents and discusses the evolution of species, morphology, and ecology in Hypocrella, Moelleriella, and Samuelsia based on multigene phylogenetic analyses.

View Article: PubMed Central - PubMed

Affiliation: Department of Biology, Howard University, 415 College Street NW, Washington D.C. 20059, U.S.A.

ABSTRACT
The present taxonomic revision deals with Neotropical species of three entomopathogenic genera that were once included in Hypocrella s. l.: Hypocrella s. str. (anamorph Aschersonia), Moelleriella (anamorph aschersonia-like), and Samuelsia gen. nov (anamorph aschersonia-like). Species of Hypocrella, Moelleriella, and Samuelsia are pathogens of scale insects (Coccidae and Lecaniidae, Homoptera) and whiteflies (Aleyrodidae, Homoptera) and are common in tropical regions. Phylogenetic analyses of DNA sequences from nuclear ribosomal large subunit (28S), translation elongation factor 1-alpha (TEF 1-alpha), and RNA polymerase II subunit 1 (RPB1) and analyses of multiple morphological characters demonstrate that the three segregated genera can be distinguished by the disarticulation of the ascospores and shape and size of conidia. Moelleriella has filiform multi-septate ascospores that disarticulate at the septa within the ascus and aschersonia-like anamorphs with fusoid conidia. Hypocrella s. str. has filiform to long-fusiform ascospores that do not disarticulate and Aschersonia s. str. anamorphs with fusoid conidia. The new genus proposed here, Samuelsia, has filiform to long-fusiform ascospores that do not disarticulate and aschersonia-like anamorphs with small allantoid conidia. In addition, the present study presents and discusses the evolution of species, morphology, and ecology in Hypocrella, Moelleriella, and Samuelsia based on multigene phylogenetic analyses.

No MeSH data available.


A-J. Hypocrella viridans. A-C. Stromata. A-B. Stromata containing conidiomata. C. Stromata containing perithecia. D-E. Section of stroma showing perithecia. F-G. Asci and ascospores. H. Phialides and paraphyses. I. Conidia. J. Colony on PDA at 25 °C after ca. 3 wk. A: K(M)120253 (type); B: CUP 067849; C-G: IMI 346739 (epitype); H-I: CUP 067850, J: CUP 067851. Bars: A-C = 1 mm; D-E = 100 μm; F-I = 10 μm.
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fig19: A-J. Hypocrella viridans. A-C. Stromata. A-B. Stromata containing conidiomata. C. Stromata containing perithecia. D-E. Section of stroma showing perithecia. F-G. Asci and ascospores. H. Phialides and paraphyses. I. Conidia. J. Colony on PDA at 25 °C after ca. 3 wk. A: K(M)120253 (type); B: CUP 067849; C-G: IMI 346739 (epitype); H-I: CUP 067850, J: CUP 067851. Bars: A-C = 1 mm; D-E = 100 μm; F-I = 10 μm.

Mentions: 5. Hypocrella viridans (Berk. & M.A. Curtis) Petch, Ann. Roy. Bot. Gard. Peradeniya 7: 236. 1921. Fig. 19A-J.


A monograph of the entomopathogenic genera Hypocrella, Moelleriella, and Samuelsia gen. nov. (Ascomycota, Hypocreales, Clavicipitaceae), and their aschersonia-like anamorphs in the Neotropics.

Chaverri P, Liu M, Hodge KT - Stud. Mycol. (2008)

A-J. Hypocrella viridans. A-C. Stromata. A-B. Stromata containing conidiomata. C. Stromata containing perithecia. D-E. Section of stroma showing perithecia. F-G. Asci and ascospores. H. Phialides and paraphyses. I. Conidia. J. Colony on PDA at 25 °C after ca. 3 wk. A: K(M)120253 (type); B: CUP 067849; C-G: IMI 346739 (epitype); H-I: CUP 067850, J: CUP 067851. Bars: A-C = 1 mm; D-E = 100 μm; F-I = 10 μm.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2275321&req=5

fig19: A-J. Hypocrella viridans. A-C. Stromata. A-B. Stromata containing conidiomata. C. Stromata containing perithecia. D-E. Section of stroma showing perithecia. F-G. Asci and ascospores. H. Phialides and paraphyses. I. Conidia. J. Colony on PDA at 25 °C after ca. 3 wk. A: K(M)120253 (type); B: CUP 067849; C-G: IMI 346739 (epitype); H-I: CUP 067850, J: CUP 067851. Bars: A-C = 1 mm; D-E = 100 μm; F-I = 10 μm.
Mentions: 5. Hypocrella viridans (Berk. & M.A. Curtis) Petch, Ann. Roy. Bot. Gard. Peradeniya 7: 236. 1921. Fig. 19A-J.

Bottom Line: Hypocrella s. str. has filiform to long-fusiform ascospores that do not disarticulate and Aschersonia s. str. anamorphs with fusoid conidia.The new genus proposed here, Samuelsia, has filiform to long-fusiform ascospores that do not disarticulate and aschersonia-like anamorphs with small allantoid conidia.In addition, the present study presents and discusses the evolution of species, morphology, and ecology in Hypocrella, Moelleriella, and Samuelsia based on multigene phylogenetic analyses.

View Article: PubMed Central - PubMed

Affiliation: Department of Biology, Howard University, 415 College Street NW, Washington D.C. 20059, U.S.A.

ABSTRACT
The present taxonomic revision deals with Neotropical species of three entomopathogenic genera that were once included in Hypocrella s. l.: Hypocrella s. str. (anamorph Aschersonia), Moelleriella (anamorph aschersonia-like), and Samuelsia gen. nov (anamorph aschersonia-like). Species of Hypocrella, Moelleriella, and Samuelsia are pathogens of scale insects (Coccidae and Lecaniidae, Homoptera) and whiteflies (Aleyrodidae, Homoptera) and are common in tropical regions. Phylogenetic analyses of DNA sequences from nuclear ribosomal large subunit (28S), translation elongation factor 1-alpha (TEF 1-alpha), and RNA polymerase II subunit 1 (RPB1) and analyses of multiple morphological characters demonstrate that the three segregated genera can be distinguished by the disarticulation of the ascospores and shape and size of conidia. Moelleriella has filiform multi-septate ascospores that disarticulate at the septa within the ascus and aschersonia-like anamorphs with fusoid conidia. Hypocrella s. str. has filiform to long-fusiform ascospores that do not disarticulate and Aschersonia s. str. anamorphs with fusoid conidia. The new genus proposed here, Samuelsia, has filiform to long-fusiform ascospores that do not disarticulate and aschersonia-like anamorphs with small allantoid conidia. In addition, the present study presents and discusses the evolution of species, morphology, and ecology in Hypocrella, Moelleriella, and Samuelsia based on multigene phylogenetic analyses.

No MeSH data available.