İLKAY ÇORAK ÖCAL, NAZİFE YİĞİT KAYHAN, Merve ORUÇ

Mesobuthus gibbosus (Brullé, 1832) (Scorpiones: Buthidae) Akrep Türünün Tarak Organının Fonksiyonel Morfolojisi ve Histolojisi

Akrepler, Arachnida sınıfında zehirli arthropodlardan olup; örümcekler, keneler ve akarlar ile akraba oldukları düşünülmektedir. Ancak; akrepler, tarak organ (pektin) adı verilen duyu organı taşırlar ve bu yapılarıyla diğer akrabalarından ayrılırlar. Bu çalışmanın amacı, ışık mikroskobu ve taramalı elektron mikroskop (SEM) kullanarak Mesobuthus gibbosus (Brullé, 1832) (Scorpionidae: Buthidae) akrep türünün tarak organının (pektin) morfolojik ve histolojik özelliklerini belirlemektir. Tarak organı oluşturan dişlerin detaylı morfolojik ve histolojik yapıları rutin yöntemlerle parafine gömülerek, kesitler alınmış ve alınan kesitler hematoksilen-eosin ile boyanarak ışık mikroskobunda mikrografları kayıt edilmiştir. M. gibbosus’un pektinleri bir çift olarak mesosomal ikinci segmentin ventrolateral yerleşmiş olup, tarak şeklindeki her bir pektin organ marjinal lamella, farklı sayılardaki median lamella ve dişler olmak üzere üç kısımdan oluşmaktadır. Pektinlerde, çeşitli kutikular duyu kılları ve her bir dişin uç kısmında çok sayıda peg sensilla gözlenmiştir. M. gibbosus’un pektin organından alınan enine kesitlerde her bir peg sensilumun çok sayıda sinir hücresi ile ilişkili olduğu gözlenmiştir.

Functional Morphology and Histology of Sensory Comb Organ (Pectine) of Mesobuthus gibbosus (Brullé, 1832) Scorpion (Scorpionidae: Buthidae)

Scorpions are venomous arthropods in Arachnida classis; they are thought to be related with the spiders, ticks and mites. However, scorpions have sensory organs called sensory comb organ (pectine) and their structure are distinctive other relatives. The objective of the present study, is to characterize the morphological and histological features of pectines (sensory comb) organ of scorpion species Mesobuthus gibbosus (Brullé, 1832) (Scorpionidae: Buthidae) were identified by using light microscope and scanning electron microscope (SEM). The pectines were prepared by following routine electron microscope procedures and routine paraffin methods and the sections were stained by hematoxylineosin stain. The pectines of M. gibbosus are paired sensory organs located on the ventrolateral of second segments of mesosoma, the comb like each pectin organ consist of marginal lamella, different number of median lamella and teeth. Pectines have several sensory hairs and peg sensilla of tip of the tooth. The transverse sections of pectines organ were observed that each peg sensilum innerved by many sensory neurons.

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