Petrarca V, Carrara G C, Di Deco M A, Petrangeli G
Istituto di Parassitologia, Università di Roma La Sapienza.
Parassitologia. 1984 Dec;26(3):247-59.
Four species of the Anopheles gambiae complex were identified in Mozambique (East Africa) by chromosomal analysis. They were An. merus, An. gambiae s.s., An. arabiensis and An. quadriannulatus. An. merus was observed in coastal zones as well as in inner areas where the rivers are tidal and brackish and/or the soil is salty. An. gambiae s.s. is present in the central-northern regions (north of Save river) from the coast to the western mountains. On the coast it is often sympatric with An. merus. It is apparently absent south of Save river. An. arabiensis was observed in samples from the north-western hilly and mountainous areas, sympatrically with An. gambiae s.s., as well as south of Save river where often it is sympatric with An. merus. Only one specimen of An. quadriannulatus was observed. It was from a small sample collected feeding on bovid in a southern locality (Bela Vista-Maputo area). No inversion polymorphism was observed in the 446 An. merus identified. A quite low degree of inversion polymorphism was shown by both An. gambiae s.s. and An. arabiensis, involving 2Rb, 2La and 2Rb inversion systems respectively. By morphological analysis of cytogenetically identified samples of three species of the complex, number of sensilla coeloconica and palpal ratio were confirmed to be useful to distinguish An. merus from An. gambiae s.s./An. arabiensis. The overlapping areas between brackish and freshwater species become smaller when both characters are considered together, 1.5% and 3.5% being the probabilities of confusing An. merus with An. gambiae s.s. and An. arabiensis respectively.
通过染色体分析在莫桑比克（东非）鉴定出冈比亚按蚊复合体的4个物种。它们是梅氏按蚊、冈比亚按蚊指名亚种、阿拉伯按蚊和四带按蚊。梅氏按蚊在沿海地区以及河流受潮汐影响且咸淡混合和/或土壤含盐的内陆地区被观察到。冈比亚按蚊指名亚种分布在中北部地区（萨韦河以北），从海岸到西部山区。在海岸地区，它常与梅氏按蚊同域分布。在萨韦河以南显然没有该物种。在西北部丘陵和山区的样本中观察到阿拉伯按蚊，它与冈比亚按蚊指名亚种同域分布，在萨韦河以南也常与梅氏按蚊同域分布。仅观察到1只四带按蚊标本。它来自在南部某地（贝拉维斯塔 - 马普托地区）采集的一个以牛为宿主的小样本。在所鉴定的446只梅氏按蚊中未观察到倒位多态性。冈比亚按蚊指名亚种和阿拉伯按蚊均表现出相当低程度的倒位多态性，分别涉及2Rb、2La和2Rb倒位系统。通过对该复合体3个物种的细胞遗传学鉴定样本进行形态学分析，证实腔锥感器数量和触须比例有助于区分梅氏按蚊与冈比亚按蚊指名亚种/阿拉伯按蚊。当同时考虑这两个特征时，咸淡水物种之间的重叠区域变小，将梅氏按蚊误判为冈比亚按蚊指名亚种和阿拉伯按蚊的概率分别为1.5%和3.5%。
