The repeated observation of dog dung covered by abundant white cottony mycelium in a private garden in the city of Rio de Janeiro, state of Rio de Janeiro (Brazil) prompted an investigation to clarify the identity of the fungus involved. Three different species of mucoralean fungi (together with some ascomycete asexual morphs) were present. Two were identified as belonging to Mycotypha sp. and Thamnostylum sp., and the third belonged to Mucor sp. This publication deals with the full taxonomic elucidation of the latter. Based on morphological, physiological, and molecular data (ITS and LSU rDNA regions), it was recognized that this Mucor differed from all other species. It produces strongly sympodially circinate branched sporangiophores (some with up to four septa) with numerous swellings resembling abortive sporangia. It also has cylindrical, obovoid, pyriform, or ovoid columellae and its sporangiospores are mostly ellipsoid, although some are subglobose and others are irregular. Based on the evidence of the analyzed datasets, the new species Mucor merdophylus is hereby proposed.

中文翻译：

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来自令人厌恶的基质的新型毛霉菌真菌：Mucor merdophylus sp。十一月，从狗粪中分离出来

在里约热内卢（巴西）州里约热内卢市的一个私人花园中，反复观察被大量白色棉状菌丝覆盖的狗粪促使一项调查以澄清所涉真菌的身份。存在三种不同种类的毛囊真菌（连同一些子囊菌无性变体）。两个被确定为属于Mycotypha sp。和 Thamnostylum sp.，第三个属于 Mucor sp。本出版物涉及后者的完整分类学阐明。根据形态学、生理学和分子数据（ITS 和 LSU rDNA 区域），人们认识到这种毛霉与所有其他物种不同。它产生强烈的同节环状分枝孢子囊（有些具有多达四个隔膜），具有许多类似于流产孢子囊的肿胀。它也有圆柱形，倒卵球形、梨形或卵球形的小柱及其孢子囊孢子大多是椭圆形的，虽然有些是近球形的，有些是不规则的。根据分析数据集的证据，特此提出新物种 Mucor merdophylus。