Mesodermal organogenesis in the embryo of the primitive moth, Neomicropteryx nipponensis Issiki (Lepidoptera, Micropterygidae)

Journal of Morphology
Yukimasa Kobayashi, Hiroshi Ando

Abstract

The formation of somites, coelomic sacs, splanchnic mesoderm, fat bodies, circular system, gonads, and musculature in the embryo of the primitive moth, Neomicropteryx nipponensis Issiki, is described. The following paired somites are formed: the labral, antennal, intercalary, mandibular, maxillary, labial, three thoracic, and 11 abdominal. Small but distinct coelomic cavities appear in all these somites. Labral somites differentiate into the labral muscles, stomodaeal muscles, and dorsal dilator muscles of the pharynx. Antennal somites differentiate into the antennal muscles, aorta, and the ventral dilator muscles of the pharynx. Intercalary somites are short-lived, disintegrating to liberate many free cells into the yolk. The suboesophageal body is not formed. Mandibular somites differentiate into the mandibular flexor and extensor muscles. Maxillary and labial somites differentiate into the splanchnic mesoderm, fat bodies, and into muscles of the maxillolabial region. Three pairs of thoracic and ten pairs of abdominal somites split into the splanchric and somatic mesoderm. The 11th abdominal somites merge into the proctodaeal mesoderm, and differentiate into the musculature of the hindgut. The heart is formed by the fusion of...Continue Reading

Citations

Aug 1, 1986·Roux's Archives of Developmental Biology : the Official Organ of the EDBO·Gerd JürgensChristiane Nüsslein-Volhard
Aug 13, 2014·Development, Growth & Differentiation·Ana Carolina Bahi AymoneAldo Mellender de Araújo

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