Huynh Cuong, Veenstra A.A. 2014. Reproduction, egg morphology and development observed in Monographis queenslandicus (Diplopoda: Polyxenidae) // Invertebrate Zoology. Vol.11. No.2: 335–345 [in English].

Centre for Cellular and Molecular Biology (CCMB), Deakin University, 221 Burwood Hwy, Burwood, Melbourne, Australia 3125, e-mail: cuong.huynh@deakin.edu.au

ABSTRACT: This study provides new insight into penicillate sexual behaviour and egg development as observed in Monographis queenslandicus Huynh et Veenstra, 2013 (Polyxenidae). The developing eggs were found to have two distinct stages, namely the chorion and pupoid, which both proved to be of 12–14 days duration. Both stages were characterized by distinctive external morphology. Morphological features observed pre ecdysis included the development of a smooth, tough membrane of the chorion. In contrast, the pupoid stage exhibited an embryonic cuticle with tiny spines, which were later being used to rupture the chorion. Additionally, an aperture bordered by protective sensilla located on the anterior of the pupoid is described for the first time.

KEY WORDS: Chorion, pupoid, aperture, ecdysis.

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