Pence D B, Bergan J F
Department of Pathology, Texas Tech University Health Sciences Center, Lubbock 79430, USA.
J Med Entomol. 1996 May;33(3):467-72. doi: 10.1093/jmedent/33.3.467.
A new species of hypoderatid deutonymph is described from the subcutaneous adipose tissues of the black-bellied whistling-duck, Dendrocygna autumnalis (L.), from Texas. Thalassornectes dendrocygnae n. sp. is most similar to thalassornectes rwandae Fain from the white-backed duck, Thalassornis leuconotos Eyton, in Africa. The new species is distinguished by a complete genital apodeme, the interrupted pattern of midventral cuticular sclerotization between coxal fields II and III, the dense cuticular sclerotization of the posterior idiosoma, and the long filiform seta d5, which is longer than the other idiosomal setae. In T. rwandae, the anterior and posterior parts of the genital sclerite are separated in the middle, the pattern of midventral cuticular sclerotization is continuous in the midventer, there is no dense sclerotization in the posterior idiosoma, and seta d5 is not figured (broken or absent?). There also are minor differences in chaetotaxy and solenidiotaxy of legs I and III of these 2 species. T. dendrocygnae is only the 2nd species of hypoderatid described from the host order Anseriformes. The 2 Thalassornectes spp. are described exclusively from each of the 2 genera in the host family Dendrocygnidae, respectively. Reevaluation of the suite of characters used to differentiate subgenera in the genus Thalassornectes indicates that Thalassornectes Fain, Rallidectes Fain, and Alcidectes Pence & Hoberg should be considered invalid.
从得克萨斯州黑腹树鸭（Dendrocygna autumnalis (L.)）的皮下脂肪组织中描述了一种新的皮蝇科若虫。黑腹树鸭皮蝇新种（Thalassornectes dendrocygnae n. sp.）与非洲白背鸭（Thalassornis leuconotos Eyton）的卢旺达皮蝇（Thalassornectes rwandae Fain）最为相似。新物种的特征在于完整的生殖腹片、coxal区II和III之间腹中线角质化的中断模式、后体躯密集的角质化以及长丝状刚毛d5，其比其他体躯刚毛更长。在卢旺达皮蝇中，生殖骨片的前部和后部在中间分开，腹中线角质化模式在腹部中部是连续的，后体躯没有密集的角质化，并且刚毛d5未被描绘（折断或缺失？）。这两个物种的第I和第III对足的毛序和感觉毛序也存在细微差异。黑腹树鸭皮蝇是从雁形目宿主中描述的第二个皮蝇科物种。这两个皮蝇属物种分别仅从宿主树鸭科的两个属中描述。对用于区分皮蝇属亚属的一系列特征的重新评估表明，皮蝇属（Thalassornectes Fain）、秧鸡皮蝇属（Rallidectes Fain）和阿尔西德皮蝇属（Alcidectes Pence & Hoberg）应被视为无效。
