Fungalpedia – Note 269, Clarkeinda

 

Clarkeinda Kuntze

Citation if using this entry: Sysouphanthong et al. 2024 (in prep) – Fungalpedia Basidiomycota 3. 

Index Fungorum, Facesoffungi, MycoBank, GenBank, Figs. 1 & 2

Classification: Agaricaceae, Agaricales, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi

Clarkeinda, a small saprobic genus of Agaricaceae Chevall., was established in 1891 to compile four species, which were Clarkeinda pedilia (Berk. & Broome) Kuntze from Sri Lanka is a type species,  Clarkeinda coprinus (Fr.) Kuntze,  Clarkeinda poderes (Berk. & Broome) Kuntze, and Clarkeinda rubriceps (Cooke & Massee) Kuntze [= Macrometrula rubriceps (Cooke & Massee) Donk & Singer] (Kuntze 1891, He et al. 2019). Morphologically, basidiomata medium to large size; pileus ovoid and appendiculate when mature, top of pileus covered with dark remnant of volva or patch, furfuraceous surface; lamella white and turned dull green when mature; stipe long and thick, hollow, wider at base with broad stellate volva, slightly attenuated above, covered with white woolly tufts; annulus membranous; ellipsoidal to broadly ovoid basidiospores with truncate apex and germ pore, white to pale green; cheilocystidia clavate to broadly clavate, pileus covering epithelium composed of oblong to short clavate elements (Hosen & Ge 2011, Sysouphanthong et al. 2021). Currently, five species have been accepted by He et al. (2019). However, seven species are listed in the Species Fungorum (http://www.indexfungorum.org). Only sequences of Clarkeinda trachodes (Berk.) Singer are available in the GenBank (https://www.ncbi.nlm.nih.gov/); and some studies showed that the analysis of ITS and LSU sequences certify the species is in Agaricus clade of Agaricaceae (Vellinga 2011, Sysouphanthong et al. 2021).  

Type species: Clarkeinda pedilia (Berk. & Broome) Kuntze

Synonymy: Agaricus subgen. Chitonia Fr.,Chitonia (Fr.) P. Karst., Chitoniella Henn., Chitonis Clem.

Other accepted species:

 

 

Figure 1 – Clarkeinda trachodes in situ. a,b = MFLU 19-2351. Photos from Sysouphanthong et al. (2021).

 

 

 

Figure 2 – Clarkeinda trachodes (MFLU 19-2351). a. Basidiomata. b Basidiospores. c Cheilocystidia. d A trichodermal pileus covering. Scale bars: a = 5 µm, b = 10 µm, c = 10 µm, d = 20 µm. Redrawn from Sysouphanthong et al. (2021).

 

References

He MQ, Zhao RL, Hyde KD, Begerow D, Kemler M et al. 2019 – Notes, outline and divergence times of Basidiomycota. Fungal Diversity 99, 105–367.

Hosen MI, Ge, ZW 2011 – Clarkeinda trachodes (Agaricales, Basidiomycetes), first record from Bangladesh. Mycotaxon 118, 331–336.

Kuntze O 1891 – Revisio generum plantarum (in Latin) 2. Leipzig, Germany: A. 9017 Felix. 848pp.

Sysouphanthong P, Thongklang N, Liu JK, Vellinga EC 2021 – Description of lepiotaceous fungal species of the genera Chlorophyllum, Clarkeinda, Macrolepiota, Pseudolepiota, and Xanthagaricus, from Laos and Thailand. Diversity 13, 666.

Vellinga EC, Sysouphanthong P, Hyde KD 2011 – The family Agaricaceae: Phylogenies and two new white-spored genera. Mycologia 103, 494–509.

 

Entry by

Phongeun Sysouphanthong, Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand

 

(Edited by Kevin D Hyde, S N Wijesinghe, Samaneh Chaharmiri-Dokhaharani, & Achala R. Rathnayaka)

 

Published online 21 May 2024

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