The genus Thelopsis was classified in the family Stictidaceae but its systematic position has never been investigated by molecular methods. In order to determine its family placement and to test its monophyly, fungal DNA of recent collections of Thelopsis specimens was sequenced. Phylogenetic analyses using nuLSU, RPB2 and mtSSU sequences reveal that members of Thelopsis form a monophyletic group within the genus Gyalecta as currently accepted. The placement of Thelopsis, including the generic type T. rubella, within the genus Gyalecta challenges the generic circumscription of this group because Thelopsis is well recognized by the combination of morphological characters: perithecioid ascomata, well-developed periphysoids, polysporous asci and small, few-septate ellipsoid-oblong ascospores. The sterile sorediate Opegrapha corticola is also placed in the Gyalectaceae as sister species to Thelopsis byssoidea + T. rubella. Ascomata of O. corticola are illustrated for the first time and support its placement in the genus Thelopsis. The hypothesis that O. corticola might represent the sorediate fertile morph of T. rubella is not confirmed because the species is phylogenetically and morphologically distinct. Thelopsis is recovered as polyphyletic, with T. melathelia being placed as sister species to Ramonia. The new combinations Thelopsis corticola (Coppins & P. James) Sanderson & Ertz comb. nov. and Ramonia melathelia (Nyl.) Ertz comb. nov. are introduced and a new species of Gyalecta, G. amsterdamensis Ertz, is described from Amsterdam and Saint-Paul Islands, characterized by a sterile thallus with discrete soralia. Petractis luetkemuelleri and P. nodispora are accommodated in the new genus Neopetractis, differing from the generic type (P. clausa) by having a different phylogenetic position and a different photobiont. Francisrosea bicolor Ertz & Sanderson gen. & sp. nov. is described for a sterile sorediate lichen somewhat similar to Opegrapha corticola but having an isolated phylogenetic position as sister to a clade including Gyalidea praetermissa and the genera Neopetractis and Ramonia. Gyalecta farlowii, G. nidarosiensis and G. carneola are placed in a molecular phylogeny for the first time. The taxonomic significance of morphological characters in Gyalectaceae is discussed.

中文翻译：

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Thelopsis 挑战 Gyalectaceae 的属界限并为 Ramonia 的分类学带来新的见解

属拟南芥被归入家庭刺科但它的系统位置从未被分子方法研究过。为了确定其家庭位置并测试其最近收集的单系真菌DNA拟南芥标本被测序。使用 nuLSU 进行系统发育分析，RPB2 和 mtSSU 序列揭示了拟南芥在该属内形成一个单系群贾莱克塔目前已接受。的放置拟南芥，包括泛型风疹, 属内贾莱克塔挑战这个群体的一般界限，因为拟南芥由形态特征的组合很好地识别：perithecioid ascomata，发育良好的periphysoids，polysporous asci和小的，很少隔的椭圆形长方形子囊孢子。无菌剂蜈蚣也被放置在姜科作为姐妹物种茯苓+风疹. 子囊O. corticola首次说明并支持其在该属中的位置拟南芥. 假设O. corticola可能代表sorediate 肥沃的形态风疹没有得到证实，因为该物种在系统发育和形态上是不同的。拟南芥被回收为多系的，与T. melathelia被列为姐妹物种拉莫尼亚. 新组合螳螂(Coppins & P.​​ James) Sanderson & Ertz 梳理。十一月 和茯苓(Nyl.) Ertz 梳子。十一月 被引入和一个新的物种贾莱克塔,G. amsterdamensisErtz，来自阿姆斯特丹和圣保罗群岛，其特征是不育的菌体和离散的索拉利亚。荸荠和P. nodispora被纳入新属新腹肌, 不同于泛型类型 (P.克劳萨) 通过具有不同的系统发育位置和不同的光生物。弗朗西斯玫瑰双色厄茨和桑德森 ＆sp。十一月 被描述为一种无菌的鳞状地衣，有点类似于蜈蚣但具有一个孤立的系统发育位置，作为一个进化枝的姐妹，包括大叶蜈蚣和属新腹肌和拉莫尼亚.法罗蚬,G. nidarosiensis和G. carneola首次被置于分子系统发育中。形态特征的分类学意义姜科被讨论。