A new species of Henneguya Thélohan, 1892 (Bivalvulida: Myxobolidae) is described from the submucosa of the intestine and pyloric ceca of red drum (Sciaenops ocellatus [Linnaeus, 1766] [Perciformes: Sciaenidae]) from the Gulf of Mexico off Gulf Shores, Alabama. Henneguya albomaculata n. sp. differs from all congeners by the combination of myxospore dimensions, polar tubule coil count, the presence of an iodinophilic vacuole in the sporoplasm, and small-subunit ribosomal deoxyribonucleic acid (SSU rDNA) sequence. A phylogenetic analysis of the SSU rDNA recovered H. albomaculata sister to Henneguya cynosioniDykova, de Buron, Roumillat, and Fiala, 2011 in a clade composed of 11 species of Henneguya and 1 species of Myxobolus Bütschli, 1882 (Bivalvulida: Myxobolidae) that collectively infect fishes in marine or estuarine systems. Histologic sections of infected intestine and pyloric ceca revealed plasmodia of H. albomaculata n. sp. developing in the loose connective tissue of the submucosa. The new species comprises the second species of Henneguya reported from red drum.

Henneguya Thélohan，1892 年（双壳类：Myxobolidae）的一个新种，是从来自墨西哥湾海岸的红石首鱼（Sciaenops ocellatus [Linnaeus，1766] [Perciformes：Sciaenidae]）的肠粘膜下层和幽门盲肠中描述的，阿拉巴马州。Henneguya albomaculata n.亨内古亚白斑 sp。与所有同系物的不同之处在于粘孢子尺寸、极管线圈计数、孢子质中嗜碘液泡的存在以及小亚基核糖体脱氧核糖核酸 ( SSU rDNA) 序列的组合。对SSU rDNA的系统发育分析发现H. albomaculata是Henneguya cynosioni 的姐妹Dykova、de Buron、Roumillat 和 Fiala，2011 年，在一个由 11 种Henneguya和 1 种Myxobolus Bütschli 组成的进化枝中，1882 年（双壳类：Myxobolidae）共同感染海洋或河口系统中的鱼类。受感染肠道和幽门盲肠的组织学切片显示H. abomaculata n. 的疟原虫。sp。在粘膜下层的疏松结缔组织中发育。该新物种包括从红石首鱼报道的第二个Henneguya物种。