Category Archives: fungi

Circulocolumella hahashimensis (S. Ito & S. Imai) S. Ito & S. Imai in Imai

Hahajima Circulocolumnella Mushroom (Circulocolumella hahashimensis)

The Hahajima Circulocolumnella Mushroom was described in 1957, it is the sole member of its genus.

The species appears to be extinct now. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Psathyrella boninensis (S. Ito & S. Imai) S. Ito

Bonin Islands Brittlestem (Psathyrella boninensis)

The Bonin Islands Brittlestem is known only from one locality on Hahajima Island in the Ogasawara group, Japan.

The species is considered extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 30.08.2020

Camarophyllus microbicolor S. Ito

Two-colored Waxy Cap (Camarophyllus microbicolor)

This species is known from specimens that were collected on the islands of Chichijima and Hahajima in the Ogasawara Islands, Japan.

It is considered extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Crepidotus subpurpureus S. Ito & S. Imai

Purple Crepidotus (Crepidotus subpurpureus)

This species is known from a single locality on the island of Hahajima in the Ogasawara group, Japan.

The species is considered extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 02.09.2021

Albatrellus cantharellus (Lloyd) Pouzar

Sendai Polypore (Albatrellus cantharellus)

This species was described in 1915; it is apparently known from an unspecified area in the vicinity of the city of Sendai on the island of Honshu, Japan.

The species appears to haven’t been recorded since and is thought to be possibly extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Pluteus daidoi S. Ito & S. Imai

Daido Shed Fungus (Pluteus daidoi)  

This species, described in 1940, is known only from one locality on Hahajima Island in the Ogasawara group, Japan.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 30.08.2020

Campanella boninensis (S. Ito & S. Imai) Parmasto

Bonin Islands Campanella Mushroom (Campanella boninensis)  

This species is known from a single locality on the island of Chichijima in the Ogasawara group, Japan. 

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Pluteus horridilamellus S. Ito & S. Imai

Hahajima Shed Fungus (Pluteus horridilamellus)  

The Hahajima Shed Fungus, which was described in 1940, is known only from one locality on the island of Hahajima in the Ogasawara group, Japan.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 30.08.2020

Pluteus okabei S. Ito & S. Imai

Okabe’s Shed Fungus (Pluteus okabei)

This species was described in 1940; it is known only from a small area at Mt. Asahiyama on Chichijima Island in the Ogasawara Islands, Japan.

The species wasn’t found during recent field searches and is thought to be possibly extinct.

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References:

[1] Takahito Kobayashi: Type studies of the new species of Pluteus described by Seiya Ito and Sanshi Imai from Japan. Mycoscience 43: 411-415. 2002

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edited: 26.04.2022

Hygrocybe macrospora (S. Ito & S. Imai) S. Ito

Great-spored Waxcap (Hygrocybe macrospora)  

This species is known only from a single locality on the island of Chichijima in the Ogasawara Islands, Japan.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom species thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Lactarius ogasawarashimensis S. Ito & S. Imai

Ogasawara Milk-Cap (Lactarius ogasawarashimensis)

The Ogasawara Milk-Cap was described in 1940; it is known only from the island of Chichijima, Ogasawara Islands, Japan, where it was found growing amongst the roots of Luchu Pines (Pinus luchuensis Mayr), a tree species that is actually not native to the Ogasawara Islands, thus it is quite possible that this fungus might as well not be a native form. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Russula boninensis S. Ito & S. Imai

Bonin Milk-Cap (Russula boninensis)

The Bonin Milk-Cap was described in 1940; it is known only from Chichijima Island in the Ogasawara islands, Japan.

The species was found amongst the roots of the Luchu Pine (Pinus luchuensis Mayr), a tree species that is not native to the Ogasawara Islands but was artificially introduced from the Ryukyu Islands; thus the fungus might in fact also be native to these island group. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Gymnopilus noviholocirrhus S. Ito & S. Imai

Hahajima Gymnopilus (Gymnopilus noviholocirrhus)
 
This species was described in 1940; it is known only from a single locality on the island of Hahajima in the Ogasawara Islands, Japan, where it was found growing on the Bonin Islands Hackberry (Celtis boninensisKoidz.).

The species was apparently not found again since and is considered most likely extinct. [1]


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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Collybia matris S. Ito in S. Ito & S. Imai

Matrice Collybia Fungus (Collybia matris)

This species was described in 1939; it is known from the islands of Chichima and Hahajima in the Ogasawara Islands, Japan.

The species was not recorded during recent field studies and might be extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Hygrocybe miniatostriata (S. Ito & S. Imai) S. Ito

Small-striped Waxcap (Hygrocybe miniatostriata)  

This species is known only from a single locality on the island of Chichijima in the Ogasawara Islands, Japan.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Coprinus boninensis S. Ito & S. Imai

Bonin Islands Ink Cap (Coprinus boninensis)  

This species is known from a single locality on the island of Chichijima in the Ogasawara group, Japan, where it was growing on decaying herbs.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Lentinus lamelliporus Har. & Pat.

Tokyo Lentinus Fungus (Lentinus lamelliporus)

This species was described in 1902; it is apparently known only from a small area within Tokyo, the Japanese capital on the island of Honshu.

The species could not be traced during recent searches and might well be extinct. [1]

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References:

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 26.04.2022

Pleurotus cyatheae S. Ito & S. Imai

Tree Fern Oyster Mushroom (Pleurotus cyatheae)  

This species, described in 1939, is known only from two localities on the island of Chichijima in the Ogasawara Islands, Japan, where it apparently grew on the stems of tree ferns.

The species is considered extinct. [1]

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References:  

[1] Kentaro Hosaka; Takahito Kobayashi; Michael A. Castellano; Takamichi Orihara: The status of voucher specimens of mushroom spwcies thought to be extinct from Japan. Bulletin of the National Museum of Nature and Science Ser. B 44(2): 53-66. 2018

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edited: 31.08.2020

Pluteus machidae S. Ito & S. Imai

Machida’s Shed Fungus (Pluteus machidae)

This species was described in 1940; it is known only from a small area on the island of Hahajima, where it was found growing on a dead trunk in the forest.

The species wasn’t found during recent fieldworks and is considered likely extinct.

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References:

[1] Takahito Kobayashi: Type studies of the new species of Pluteus described by Seiya Ito and Sanshi Imai from Japan. Mycoscience 43: 411-415. 2002

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edited: 26.04.2022