Christison Kevin W, Vaughan David B, Shinn Andrew P, Hansen Haakon
Department of Forestry, Fisheries and the Environment, Private Bag X2, Vlaeberg, 8012, South Africa.
Department of Biodiversity and Conservation Biology, University of the Western Cape, Private Bag X 17, Bellville, 7535, South Africa.
Int J Parasitol Parasites Wildl. 2021 Apr 7;15:87-94. doi: 10.1016/j.ijppaw.2021.02.011. eCollection 2021 Aug.
sp. n. is described from the body surface and fins of the South African mullet, (Smith, 1846) collected from Table Bay Harbour, Cape Town and is compared to five other species described from grey mullets globally namely Ling, 1963 and Zhukov, 1970 from (Temminck and Schlegel, 1845); Rawson, 1973 from L. Conroy and Conroy, 1985 from Valenciennes, 1836 and Zang,Yang and Liu, 2001 from (Smith, 1846). Morphologically, sp. n. has prominent ventral bar processes that near cover the hamulus roots, marginal sickles with large rhomboid heels, slender shafts and fine points that extend beyond the sickle toes. sp. n. can, however, be readily differentiated: and have ventral bars with small ventral processes; has marginal hooks sickles with slender shafts and proportionately short points and open-faced blades; possesses marginal hook sickles with deep, rounded heels, forward slanting shafts and an angular, square line to the inner face of the blades. Although the length of the marginal hooks of are similar to sp. n., their hamuli are double the size. A GenBank BlastN search with the 931 bp sequence covering ITS1, 5.8S and ITS2 gave no close hits; the nearest species for which sequences are available is Ogawa and Egusa, 1978 (identity 96.56%, 899/931 bp). The proposal of sp. n. as a new species, therefore, is well supported by both the molecular and morphological analyses presented herein. This species is the first to be described from and only the second species to be described from the marine environment off the African continent.
新物种是从南非鲻鱼（Mugil capensis (Smith, 1846)）的体表和鳍中描述的，该样本采集于开普敦的桌湾港，并与全球其他五种从鲻鱼中描述的物种进行了比较，即Ling（1963年）和Zhukov（1970年）描述的来自日本乌鱼（Mugil cephalus (Temminck and Schlegel, 1845)）的物种；Rawson（1973年）描述的来自Mugil curema Valenciennes, 1836的物种；Conroy和Conroy（1985年）描述的来自Mugil liza (Valenciennes, 1836)的物种；以及Zang、Yang和Liu（2001年）描述的来自南非鲻鱼（Mugil capensis (Smith, 1846)）的物种。形态上，新物种有突出的腹杆突起，几乎覆盖了小钩根部，边缘镰刀有大的菱形后跟，杆细长且尖端细，延伸到镰刀趾之外。然而，新物种很容易区分：日本乌鱼和Mugil curema的腹杆有小的腹侧突起；Mugil liza的边缘钩镰刀杆细长，尖端相对较短且叶片为开放式；Mugil cephalus的边缘钩镰刀有深的圆形后跟，杆向前倾斜，叶片内面有角状方形线。虽然Mugil cephalus边缘钩的长度与新物种相似，但其小钩大小是新物种的两倍。对覆盖ITS1、5.8S和ITS2的931 bp序列进行GenBank BlastN搜索没有得到相近匹配；有可用序列的最接近物种是Ogawa和Egusa（1978年）描述的物种（同一性96.56%，899/931 bp）。因此，本文提出的新物种得到了分子和形态分析的有力支持。该物种是第一个从南非鲻鱼中描述的物种，也是第二个从非洲大陆近海海洋环境中描述的鲻科物种。
