【摘要】 报道了横断山区无壳缝目硅藻的13个中国新记录种，包括：截形粗肋藻(Odontidium truncatum(Mayer) Luo&Wang nov. comb.)、吉尔曼等杆藻Distrionella germainii(Reichardt&Lange-Bertalot) Morales, Bahls&Cody)、绒毛平板藻线形变种(Tabellaria flocculosa var.linearis Koppen)、二头端脆型藻纯正变种(Fragilariforma bicapitata var.genuina Ta?kin&A9ikg9z)、爪哇脆型藻(Fragilariforma javanica(Hustedt) Wetzel, Morales&Ector)、水生脆杆藻(Fragilaria aquaplus Lange-Bertalot&Ulrich)、北方脆杆藻(Fragilaria boreomongolica Kulikovskiy, Lange-Bertalot, Witkoxski&Dorofeyuk)、桑德里亚脆杆藻(Fragilaria sandelii Van de Vijcer&Jarlman)、石南脆杆藻(Fragilaria heatherae Kahlert&Kelly)、近菱形脆杆藻(Fragilaria crassirhombica Metzelitin, Lange-Bertalot&Soninkhishig)、宾西法尼亚脆杆藻(Fragilaria pennsylvanica Morales)、米萨雷脆杆藻(Fragilaria misarelensis Almeida, Delgado, Novais&Blanco)和窄肘形藻(Ulnaria macilenta Morales, Wetzel&Rivera)。本文对新记录种的形态特征进行了详细描述，给出了每个种的地理分布、生境信息和理化指标，并对新记录种及其相似种的形态特征进行讨论。更多还原

【Abstract】 Thirteen species of Araphidiales(Bacillariophyta) are newly recorded from the Hengduan Mountains, including Odontidium truncatum(Mayer) Luo & Wang nov. comb., Distrionella germainii(Reichardt & Lange-Bertalot) Morales, Bahls & Cody, Tabellaria flocculosa var. linearis Koppen, Fragilariforma bicapitata var. genuina Ta?kin & A9 ikg9 z, Fragilariforma javanica(Hustedt) Wetzel, Morales & Ector, Fragilaria aquaplus Lange-Bertalot & Ulrich, Fragilaria boreomongolica Kulikovskiy, Lange-Bertalot, Witkoxski & Dorofeyuk, Fragilaria sandelii Van de Vijcer & Jarlman, Fragilaria heatherae Kahlert & Kelly, Fragilaria crassirhombica Metzelitin, Lange-Bertalot & Soninkhishig, Fragilaria pennsylvanica Morales, Fragilaria misarelensis Almeida, Delgado, Novais & Blanco, and Ulnaria macilenta Morales, Wetzel & Rivera. Herein, we describe in detail the morphological characteristics of the newly recorded species, as well as their geographic distribution, habitat information, and physicochemical indicators. The morphological characteristics of the newly recorded species and similar species are also discussed.更多还原