Pulis Eric E, Fayton Thomas J, Curran Stephen S, Overstreet Robin M
Department of Coastal Sciences, University of Southern Mississippi, 703 East Beach Drive, Ocean Springs, Mississippi 39564, USA.
J Parasitol. 2013 Jun;99(3):501-8. doi: 10.1645/12-106.1. Epub 2013 Jan 17.
Intromugil alachuaensis n. sp. is described based on specimens collected from the flathead grey mullet ( Mugil cephalus ) from the Santa Fe River in Florida. The new species is the fourth recognized species in the genus and the second from North America, with the other 2 being confined to South America. Intromugil mugilicolus from Louisiana and Mississippi is redescribed based on the holotype and newly collected material that was not flattened prior to fixation. Two generic features not previously reported are apparent in the new material from I. mugilicolus and I. alachuaensis n. sp.: an armed oral sucker and a series of sacs containing glandular material arranged in symmetrical rows in the hermaphroditic duct. Intromugil alachuaensis differs from I. mugilicolus by having an oral sucker longer than wide, body spines smaller and lanceolate rather than longer and hastate, and smaller vitelline follicles. Intromugil alachuaensis n. sp. differs from Intromugil simonei by having a large elongated pharynx rather than a smaller subspherical one, a proportionately larger and longer oral sucker, and a longer prepharynx (greater than 1 pharyngeal length). Intromugil alachuaensis n. sp. differs from Intromugil annakohnae by having a longer than wide pharynx, a relatively large oral sucker, less extensive vitellarium, and smaller body spines. Comparison of more than 2,400 base-pair-long sequences of nuclear rDNA (partial 18S, complete ITS1, complete 5.8S, complete ITS2, and partial 28S) from I. mugilicolus and I. alachuaensis n. sp. reveals 110 pairwise differences, including gaps, thus supporting our proposal of a new species. These represent the first published sequences from species in this genus.
阿拉楚阿湾内吸鱼新种（Intromugil alachuaensis n. sp.）是根据从佛罗里达州圣菲河的鲻鱼（Mugil cephalus）采集的标本描述的。该新物种是该属中第四个被认可的物种，也是来自北美的第二个物种，另外两个局限于南美洲。基于正模标本和新采集的在固定前未压扁的材料，对来自路易斯安那州和密西西比州的路易斯安那内吸鱼（Intromugil mugilicolus）进行了重新描述。在来自路易斯安那内吸鱼和阿拉楚阿湾内吸鱼新种的新材料中，有两个以前未报道过的属的特征很明显：一个有武装的口吸盘和一系列在两性管中呈对称排排列的含有腺物质的囊。阿拉楚阿湾内吸鱼与路易斯安那内吸鱼的区别在于口吸盘长大于宽、体表棘较小且呈披针形而非更长且呈戟形，以及卵黄滤泡较小。阿拉楚阿湾内吸鱼新种与西蒙内内吸鱼（Intromugil simonei）的区别在于有一个大的细长咽而非较小的近球形咽、口吸盘相对更大且更长，以及咽前区长（大于1个咽长）。阿拉楚阿湾内吸鱼新种与安娜科纳内吸鱼（Intromugil annakohnae）的区别在于咽长大于宽、口吸盘相对较大、卵黄腺分布范围较小，以及体表棘较小。对路易斯安那内吸鱼和阿拉楚阿湾内吸鱼新种的超过2400个碱基对长的核核糖体DNA序列（部分18S、完整的ITS1、完整的5.8S、完整的ITS2和部分28S）进行比较，发现有110个成对差异，包括缺口，从而支持了我们提出的新物种的提议。这些是该属物种首次发表的序列。
