holoblastic


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holoblastic

[¦häl·ə¦blas·tik]
(embryology)
Pertaining to eggs that undergo total cleavage due to the absence of a mass of yolk.
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References in periodicals archive ?
Opisthobranch embryology involves spiral, typically holoblastic, cleavage, which is highly conserved within annelids, molluscs, and nemerteans (Wilson, 1892; Casteel, 1904; Thompson, 1958; Maslakova et al.
Complete development of the northeast Pacific arminacean nudibranch Janolus fuscus
scaura: (1) transition from holoblastic cleavage to superficial cleavage, (2) germdisc condensation, (3) germband formation and elongation, (4) germband flexure and limb bud formation, (5) limb bud elongation and segmentation, and (6) dorsal closure and reversal of cephalic direction.
Embryonic development and expression analysis of Distal-less in Caprella scaura (Crustacea, Amphipoda, Caprellidea)
The early holoblastic cleavages are diagrammed in Fig.
The slipper snail, Crepidula: an Emerging lophotrochozoan model system[dagger]
Owenia collaris embryos undergo holoblastic spiral cleavage to form a coeloblastula, which, although exceptionally hollow (again like some nemerteans), conforms to the ancestral pattern for annelids (Okada, 1970).
Unusual development of the mitraria larva in the polychaete Owenia collaris
pentagona through the stages of holoblastic radial cleavage, early blastula, wrinkled blastula, and gastrula was typical of development in lecithotrophic sea stars (Byrne, 1995).
Reproduction and larval morphology of broadcasting and viviparous species in the Cryptasterina species complex
The zygote then undergoes radial, holoblastic cleavage and forms a hollow coeloblastula.
Early development and acquisition of zooxanthellae in the temperate symbiotic sea anemone Anthopleura ballii (cocks)
Although microtubules have been correlated with cytoplasmic movements that follow fertilization in amphibians (4), ascidians (5), and annelids (6), these embryos do not form blastodisc caps and, unlike the squid, they undergo complete or holoblastic cleavage.
Ooplasm segregation in the squid embryo, loligo pealeii
After fertilization, early cleavage events were holoblastic, progressing by furrow formation.
Early Development of Zooxanthella-Containing Eggs of the Corals Pocillopora verrucosa and P. eydouxi with Special Reference to the Distribution of Zooxanthellae

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