Fossil fungi with suggested affinities to the Endogonaceae from the Middle Triassic of Antarctica
Fossil fungi with suggested affinities to the Endogonaceae from the Middle Triassic of Antarctica
复制标题
与南极洲中三叠世的内孢菌科有亲缘关系的化石真菌
DOI：
10.3852/11-384
复制
发表时间：
2012
期刊：
影响因子：
2.8
通讯作者：
Gianna Persichini
中科院分区：
文献类型：
--
作者：
M. Krings;T. N. Taylor;Nora Dotzler;Gianna Persichini
接合菌真菌的化石证据是罕见的。在南极洲中三叠世的过矿化泥炭中发现了一种引人注目的真菌化石Jimwhitea circumtecta gen. et sp. nov.。化石被解释为一个覆盖的颧孢子囊，从一个大配子囊中萌发，由一个囊状的大柄支撑。大配子囊在其尖端与由微柄支撑的小配子囊相连。这种结构与某些现代内胆科的合子孢子囊配子囊复合体惊人地相似。与圆叶姜共生的是分离的繁殖体，与圆叶姜的接合孢子囊非常相似，孢子皮中含有接合孢子囊的一部分嵌在球状体中。有些孢子囊生在卵球形或细长的结构上，我们称之为配子囊。这些化石为中生代早期接合菌的形态和繁殖生物学提供了非常详细的观点。
Documented fossil evidence of zygomycetous fungi is rare. A conspicuous fungal fossil, Jimwhitea circumtecta gen. et sp. nov., occurs in permineralized peat from the Middle Triassic of Antarctica. The fossil is interpreted as a mantled zygosporangium that buds from a macrogametangium subtended by a sac-like macrosuspensor. The macrogametangium is united at its tip with a microgametangium which is subtended by a micro-suspensor. This configuration is strikingly similar to the zygosporangium-gametangia complexes seen in certain modern Endogonaceae. Co-occurring with J. circumtecta are isolated propagules closely resembling the zygosporangium of J. circumtecta and a portion of a sporocarp containing zygosporangia embedded in a gleba. Several of the sporangia are borne on ovoid or elongate structures, which we interpret as gametangia. These fossils offer an exceptionally detailed view of the morphology and reproductive biology of early Mesozoic zygomycetes.