A MORPHOLOGICAL STUDY ON THE VENOM APPARATUS OF THE SPIDER ERESUS CINNABARINUS (OLIVIER, 1789) (ARANEAE, ERESIDAE)

Year 2007, Volume: 2 Issue: 2, 126 - 135, 01.12.2007

Kültiğin Çavuşoğlu

Abstract

In this study, morphological structure of the venom apparatus of Eresus cinnabarinus was studied using scanning electron microscope (SEM). Venom apparatus situated in the prosoma is composed of a pair of chelicerae and venom glands. Each chelicera consists of two parts, a stout basal part covered by hair, and a movable venom fang. A venom pore is situated on subterminal part of the fang. There are parallel grooves at out surface of the venom fang. Just below the venom fang, there is a chelicera groove next to the teeth. Each side of the groove is covered with cuticular teeth. The venom glands are rather big and they are similar to clapper in shape. Each gland is surrounded by completely striated muscular fibers. The venom produced in the venom glands by contraction of these muscular fibers is ejected into the venom fang through a canal, and is thrown out by the venom pore. 

Keywords

Eresus cinnabarinus, Chelicerae, morphology, venom gland, scanning electron microscope

ERESUS CINNABARINUS (OLIVIER, 1789) (ARANEAE, ERESIDAE) ÖRÜMCEĞİNİN ZEHİR AYGITI ÜZERİNE MORFOLOJİK BİR ÇALIŞMA

Abstract

Bu çalışmada Eresus cinnabarinus’un zehir aygıtının morfolojik yapısı taramalı elektron mikroskop kullanılarak (SEM) incelenmiştir. Prosoma’da yer alan zehir aygıtı, bir çift keliser ile bir çift zehir bezinden oluşmuştur. Keliserlerin her biri, kıllarla kaplı olan şişkin bir bazal parça ve hareketli bir zehir dişine sahiptir. Dişin uca yakın kısmında bir zehir deliği yer almaktadır. Zehir dişinin dış yüzeyinde düzgün ve paralel dizilmiş oluklar bulunmaktadır. Zehir dişinin hemen altında, bu dişin oturduğu keliser oluğu bulunmaktadır. Bu oluğun her iki tarafı kutikular dişler ile örtülüdür. Zehir bezleri oldukça büyüktür ve şekil itibarı ile dile benzemektedir. Bezlerin etrafı tamamen çizgili kas lifleri ile sarılmıştır. Bu kas liflerinin kasılmasıyla zehir bezinde üretilen zehir bir kanal vasıtasıyla zehir dişine gelmekte ve burada yer alan zehir deliğinden dışarıya verilmektedir. 

Keywords

Eresus cinnabarinus, keliser, morfoloji, zehir bezi, taramalı elektron mikroskop (SEM)

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