Bray Rodney A, Hendrix Sherman S
Department of Zoology, Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom.
J Parasitol. 2007 Aug;93(4):860-5. doi: 10.1645/GE-1084.1.
Malawitrema staufferi n. gen., n. sp., an unusual digenean, is described from Clarias mossambicus (type host) and Bagrus meridionalis from Lake Malawi. It has a small, pyriform body, with a spinous tegument. The ceca are relative short, not reaching to the testes. The 2 testes are symmetrical in the middle hind body. The cirrus sac is long and narrow, reaching into hind body. The genital pore is median, immediately anterior to the ventral sucker. The ovary is pretesticular, and a canalicular seminal vesicle and Laurer's canal are present. The uterus usually reaches distinctly posteriorly to testes. The eggs are small. The follicular vitellarium is in 2 small fields just anterior to testes. The ventrally subterminal excretory pore leads to a claviform vesicle. This species does not fit clearly into any known family of digeneans and is placed in the Macroderoididae as a temporary measure. Other digeneans reported from Lake Malawi include Haplorchoides cahirinus (Looss, 1896) in C. mossambicus and B. meridionalis; Astiotrema turneri Bray, van Oosterhout, Blais & Cable, 2006 in Protomelas annectens, P. cf. taeniolatus, Labeotropheus fuelleborni, Ctenopharynx (Otopharynx) pictus, and Pseudotropheus zebra; Glossidium pedatum Looss, 1899 in C. mossambicus and B. meridionalis; and an unidentifiable sanguinicolid from Bathyclarias nyasensis.
斯氏马拉维吸虫，新属新种，一种罕见的复殖吸虫，是从马拉维湖的莫桑比克胡鲇（模式宿主）和南方巴氏鲇中发现并描述的。它具有一个小的梨形身体，体表有棘。盲肠相对较短，未延伸至睾丸。两个睾丸在身体中后部对称。阴茎囊长而窄，延伸至身体后部。生殖孔位于正中，紧挨着腹吸盘前方。卵巢在睾丸之前，有一个管状精囊和劳氏管。子宫通常明显地向后延伸至睾丸后方。虫卵较小。滤泡状卵黄腺位于睾丸前方的两个小区域内。腹面亚末端排泄孔通向一个棒状囊。该物种不能明确归入任何已知的复殖吸虫科，作为临时措施被置于巨睾科。从马拉维湖报道的其他复殖吸虫包括莫桑比克胡鲇和南方巴氏鲇中的卡氏单睾吸虫（洛斯，1896年）；2006年在连纹原黑丽鱼、似带纹原黑丽鱼、富氏新亮丽鲷、图氏栉咽丽鱼和拟斑马中发现的特纳氏星孔吸虫；莫桑比克胡鲇和南方巴氏鲇中的有足光泽吸虫（洛斯，1899年）；以及尼亚萨湖深胡鲇中一种无法鉴定的血居吸虫。
