You selected Phaeomarasmius exquisitus (Berk.) Raithelh. 1990. This is a synonym for:

Accepted scientific name:
Agaricus arvensis Schaeff. 1774 (accepted name) 1 literature reference for Agaricus arvensis Schaeff. 1774
Synonyms:
Agaricus arvensis var. exquisitus (Vittad.) Cetto 1988 (synonym) 1 literature reference for Agaricus arvensis var. exquisitus (Vittad.) Cetto 1988
Agaricus exquisitus Vittad. 1835 (synonym) 1 literature reference for Agaricus exquisitus Vittad. 1835
Agaricus fissuratus (F.H. Møller) F.H. Møller 1952 (synonym) 1 literature reference for Agaricus fissuratus (F.H. Møller) F.H. Møller 1952
Agaricus leucotrichus (F.H. Møller) F.H. Møller 1952 (synonym) 1 literature reference for Agaricus leucotrichus (F.H. Møller) F.H. Møller 1952
Fungus arvensis (Schaeff.) Kuntze 1898 (synonym) 1 literature reference for Fungus arvensis (Schaeff.) Kuntze 1898
Phaeomarasmius chiliotrichi Singer 1951 (synonym) 1 literature reference for Phaeomarasmius chiliotrichi Singer 1951
Phaeomarasmius exquisitus (Berk.) Raithelh. 1990 (synonym) 1 literature reference for Phaeomarasmius exquisitus (Berk.) Raithelh. 1990
Pratella arvensis (Schaeff.) Gillet 1878 (synonym) 1 literature reference for Pratella arvensis (Schaeff.) Gillet 1878
Psalliota arvensis (Schaeff.) Gillet 1878 (synonym) 1 literature reference for Psalliota arvensis (Schaeff.) Gillet 1878
Psalliota arvensis var. albosquamosa W.G. Sm. 1910 (synonym) 1 literature reference for Psalliota arvensis var. albosquamosa W.G. Sm. 1910
Psalliota arvensis var. hortensis W.G. Sm. 1910 (synonym) 1 literature reference for Psalliota arvensis var. hortensis W.G. Sm. 1910
Psalliota arvensis f. obesa W.G. Sm. 1910 (synonym) 1 literature reference for Psalliota arvensis f. obesa W.G. Sm. 1910
Psalliota campestris var. arvensis (Schaeff.) Cheel 1913 (synonym) 1 literature reference for Psalliota campestris var. arvensis (Schaeff.) Cheel 1913
Psalliota fissurata F.H. Møller 1952 (synonym) 1 literature reference for Psalliota fissurata F.H. Møller 1952
Psalliota leucotricha F.H. Møller 1952 (synonym) 1 literature reference for Psalliota leucotricha F.H. Møller 1952
Common names: -
Classification:
Fungi
Phylum Basidiomycota
Class Agaricomycetes
Order Agaricales
Family Agaricaceae
Genus Agaricus
Distribution: -
Additional data: -
Source database: Species Fungorum, 9.0, Sep 2010
Latest taxonomic scrutiny: Kew Mycology, 2008
Online resource: http://www.speciesfungorum.org/Names/NamesRecord.asp?RecordID=325880
CoL taxon LSID: urn:lsid:catalogueoflife.org:taxon:d70f1bed-2dc5-11e0-98c6-2ce70255a436:col20110201