Comparison of female antennules in some genera of cyclopidae (Copepoda, Cyclopoida): Their significance for phylogengy

Cyclopidae (Copepoda, Cyclopoida) familyasının bazı cinslerine ait temsili türlerin dişilerinin birinci antenleri arasındaki segment . homolojileri antenler üzerindeki ortak setal düzen karşılaştırılarak belirlenmiştir. Setal düzenlerin karşılaştırılması, incelenen tüm cinslerine ait türlerde seta sayısının daima 44 ve aesthetasc sayısının ise daima 3 olduğunu ortaya çıkartmıştır. Cinsler arasındaki filogenetik ilişkilerin açığa çıkartılabilmesi için detaylı homoloji analizinin kesinlikle gerekli olduğu ortaya konulmuştur. Ectocyclops phaleratus ve Paracyclops canadensis türlerinin her ikisinde de antenler 11 segmentli olmasına rağmen, 11 segmentlilik durumu farklı cinslere ait bu türlerde konvergent evrim sonucu ortaya çıkmıştır. Bunlara ek olarak, dişi anten segmentlerinde meydana gelen pek çok segmental kaynaşma, filogenetik analizde kullanılabilecek birçok apomorfi ortaya çıkartmıştır.

Cyclopidae(Copepoda: Cylopoida) Familyasının bazı cinslerine ait türler arasında birinci anten karşılaştırması ve filogenideki önemi

The homology of the antennulary segments of species belonging to some genera of Cyclopidae is determined by comparing the common setation patterns on female antennules. Comparison of the setation pattern has confirmed that there are always 44 setae and 3 aesthetascs on the female antennules of all the genera examined. This study shows that the strict application of homology is essential in order to resolve the phylogenetic relationships between the genera of Cyclopidae. Although both Ectocyclops phaleratus and Paracyclops canadensis have 11 -segmented antennules, the analysis of segmental homologies has shown that the 11 -segmented condition has occurred due to convergent evolution in these two species belonging to different genera. In addition, several segmental fusions of the female antennules have been identified as apomorphic states and can be used in phylogenetic studies.

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