Marasmiellus is a genus of fungi in the family Omphalotaceae. The widespread genus, circumscribed by American mycologist William Murrill in 1915,[1] contains over 250 species.[2] The name comes from the Greek marasmus meaning wasting.
The morphology of Marasmiellus has received little attention compared to other genera of Omphalotaceae, mainly due to their uncolorful pileus, small basidiocarps, and little variation in morphological characters. These factors complicate delimitations of species within this genus. Species of Marasmiellus have prostrate and diverticulate hyphae, which have no clear orientation. However, it has been observed that other hyphae can aggregate in fascicles and be radially oriented. Furthermore, cheilocystidia arise from horizontal hyphae and are frequently embedded in the hymenium, often being prostrate. Some species of Marasmiellus use basidiospore germination, and distinguishing different genera based on reproduction would depend on the speed of germination. During germination spores of Marasmiellus tend to disperse in dilution platings. Some species are tetrapolar. Additionally, no bipolar or amphithallic taxa in this genus have been reported, which is unexpected, as this mating behavior is common for tropical agarics, by allowing rapid colonizations.[3][4] Their basidiocarps are collybioid or omphalioid and they have a white spore print. The cutis consis of a pileipellis, which sometimes transitions into a trichoderm, either with or without Rameales-structure.[5]
Species of Marasmiellus are distributed around tropical and sub-tropical forested areas around the world, where they play a significant ecological role by being saprotrophic, degrading leafy and woody remains. Some species are parasitic and attack certain plants that are economically important, such as sugar cane, maize, bananas, and coconut palms.[6] Observations of rhizomorph-forming species of Marasmiellus have also been confirmed (e.g Marasmiellus tenerrimus var setulosu and Marasmiellus opacu).[7]
Marasmiellus only represented three species when it was first described by William Murrill (Marasmiellus inconspicuous Murrill (Cuba), Marasmiellus purpureus (Berk. & Curt.) Murrill (Cuba), and Marasmiellus juniperinus Murrill (Jamaica)). Currently the genera consists of more than 250 species, of which the type species, M. juniperinus, remains the same as when the genera was first described.[4] Marasmiellus was traditionally included in Tricholomataceae R. Heim ex Pouzar,[8] but later DNA studies showed that parts of the genus belong to Omphalotaceae, which was described by A. Bresinsky in 1985. Furthermore, several studies show that the Marasmiellus branched as multiple polyphyletic and artificial groups.[9][4] This has led to conflict surrounding its position relative to Gymnopus, and has resulted in two opposing views regarding their taxonomy: 1) Marasmiellus is encompassed within Gymnopus (inclusive), or 2) Marasmiellus remains a distinct genus from Gymnopus (restrictive). The most recent studies have shown that the second hypothesis is the strongest, placing Marasmiellus as a separate genus, but more research is required to confirm this.[10][9]
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{{cite journal}}: Cite journal requires |journal= (help) {{cite journal}}: CS1 maint: multiple names: authors list (link) Marasmiellus is a genus of fungi in the family Omphalotaceae. The widespread genus, circumscribed by American mycologist William Murrill in 1915, contains over 250 species. The name comes from the Greek marasmus meaning wasting.
Marasmiellus es un género de hongos en la familia Marasmiaceae. Es un género con una distribución amplia, fue circunscrito por el micólogo norteamericano William Murrill en 1915,[1] contiene unas 250 especies.[2] Su nombre deriva de la palabra griega marasmus que significa debilitante.
Datos: Q890404
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Especies: Marasmiellus
Marasmiellus es un género de hongos en la familia Marasmiaceae. Es un género con una distribución amplia, fue circunscrito por el micólogo norteamericano William Murrill en 1915, contiene unas 250 especies. Su nombre deriva de la palabra griega marasmus que significa debilitante.
Marasmiellus (ex verbo Graeco marasmus? 'tabescens') est longe lateque diffusum fungorum familiae Marasmiacearum genus, a Gulielmo Murill mycologo Civitatum Foederatarum anno 1915 circumscriptum.[1] Generi sunt circa 250 species.[2]
Haec stipula ad biologiam spectat. Amplifica, si potes! 
Haec stipula ad mycologiam spectat. Amplifica, si potes! Marasmiellus (ex verbo Graeco marasmus? 'tabescens') est longe lateque diffusum fungorum familiae Marasmiacearum genus, a Gulielmo Murill mycologo Civitatum Foederatarum anno 1915 circumscriptum. Generi sunt circa 250 species.
Marasmiellus Murrill (twardziaczek) – rodzaj grzybów z rodziny Omphalotaceae[1].
Pozycja w klasyfikacji według Index Fungorum: Omphalotaceae, Agaricales, Agaricomycetidae, Agaricomycetes, Agaricomycotina, Basidiomycota, Fungi[1].
Nazwę polską podał Władysław Wojewoda w 2003 r. W polskim piśmiennictwie mykologicznym należące do tego rodzaju gatunki opisywane były także jako bedłka, twardzioszek lub pępownik[2].
Wykaz gatunków (nazwy naukowe) na podstawie Index Fungorum. Obejmuje on wszystkie gatunki występujące w Polsce i niektóre inne. Uwzględniono tylko gatunki zweryfikowane o potwierdzonym statusie[3]. Nazwy polskie według Władysława Wojewody[2].
Marasmiellus é um gênero de fungos da família Marasmiaceae. Tem uma distribuição generalizada e contém cerca de 250 espécies. O gênero foi descrito pelo micologista William Murrill em 1915.[1][2]
Marasmiellus é um gênero de fungos da família Marasmiaceae. Tem uma distribuição generalizada e contém cerca de 250 espécies. O gênero foi descrito pelo micologista William Murrill em 1915.
Marasmiellus là một chi nấm trong họ Marasmiaceae, thuộc bộ Agaricales. Chi nấm phân bố rộng rãi trên toàn thế giới và được nhà nghiên cứu người Mỹ, William Murrill miêu tả khoa học lần đầu tiên năm 1915.[1] Chi hiện bao gồm khoảng 250 loài.[2]
Danh pháp khoa học bắt nguồn từ tiếng Hy Lạp: marasmus có nghĩa là "hao mòn".
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Bài viết liên quan đến bộ nấm Agaricales này vẫn còn sơ khai. Bạn có thể giúp Wikipedia bằng cách mở rộng nội dung để bài được hoàn chỉnh hơn. Marasmiellus là một chi nấm trong họ Marasmiaceae, thuộc bộ Agaricales. Chi nấm phân bố rộng rãi trên toàn thế giới và được nhà nghiên cứu người Mỹ, William Murrill miêu tả khoa học lần đầu tiên năm 1915. Chi hiện bao gồm khoảng 250 loài.
Danh pháp khoa học bắt nguồn từ tiếng Hy Lạp: marasmus có nghĩa là "hao mòn".
Marasmiellus Murrill 1915
Типовой видMarasmiéllus (рус. Маразмиеллус) — род грибов семейства Негниючниковые (Marasmiaceae).
Большинство видов произрастает в тропических регионах. Большая часть видов — древесные сапротрофы.
Marasmiéllus (рус. Маразмиеллус) — род грибов семейства Негниючниковые (Marasmiaceae).
