Centrolecithal (Greek kentron = center of a circle, lekithos = yolk) describes the placement of the yolk in the centre of the cytoplasm of ova.[1] Many arthropod eggs are centrolecithal.[2]
During cytokinesis, centrolecithal zygotes undergo meroblastic cleavage, where the cleavage plane extends only to the accumulated yolk and is superficial. This is due to the large dense yolk found within centrolecithal eggs and triggers a delayed embryonic development.
^Ryder, John A. (1883). "The Law of Nuclear Displacement, and Its Significance in Embryology". Science. 1 (10): 273–277. Bibcode:1883Sci.....1..273R. doi:10.1126/science.ns-1.10.273. ISSN 0036-8075. JSTOR 1759005. PMID 17771470.
^Müller, Yara; Ammar, Dib; Nazari, Evelise (March 2004). "Embryonic development of four species of palaemonid prawns (Crustacea, Decapoda): pre-naupliar, naupliar and post-naupliar periods". Revista Brasileira de Zoologia. 21: 27–32. doi:10.1590/S0101-81752004000100005. ISSN 0101-8175.
Centrolecithal (Greek kentron = center of a circle, lekithos = yolk) describes the placement of the yolk in the centre of the cytoplasm of ova. Many arthropod...
chondrichthyans and most teleosts], sauropsids [reptiles and birds], monotremes) B. Centrolecithal (yolk in center of egg) Superficial cleavage (most insects)...
where yolk is not incorporated in the cells during cell division. Centrolecithal Isolecithal Early Development in Fish Early Development in Birds v t...
Bilateral cleavage), discoidal (see: Discoidal cleavage), or centrolecithal (see: Centrolecithal). Animals that belong to the basal phyla have holoblastic...
or "egg layers". Lepidopteran eggs, like those of other insects, are centrolecithal in that the eggs have a central yolk surrounded by cytoplasm. The yolk...
The plesiomorphic state of hymenopteran development consists of a centrolecithal, anhydropic (non-swelling) egg which exhibits superficial cleavage and...
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