Skip to main content

THE SALIVARY GLAND CHROMOSOMES OF THE BLACK FLY SIMULIUM VITTATUM ZETT.

Buy Article:

$50.00 plus tax (Refund Policy)

Abstract:

Neuroblast and salivary gland chromosomes were studied in Feulgen squash preparations of SIMULIUM VITTATUM larvae. The haploid complement consists of three metacentric chromosomes; the arm ratio of the longest (1) and shortest (3) is approximately as 1: 1, that of the second as 1: 2. Centromere regions of salivary gland chromosomes are expressed as characteristic expanded drums with large disorganized chromomeres. The third salivary gland chromosome bears the single large nucleolus and a smaller granular structure comparable to the Ring of Balbiani of chironomids. Pairing of the two constituents of salivary gland chromosomes is quite loose regardless of the degree of polyteny. Photographic maps are given of the standard band sequence of the entire complement. Relatively short inversions are the commonest type of structural rearrangement. From preliminary observations on further black fly species and an eclectic treatment of the nematocerous literature, morphological characteristics of salivary gland chromosomes are discussed with respect to their value in delimiting taxonomic segregates and determining phylogenetic relationships.

Document Type: Research Article

DOI: https://doi.org/10.1139/z53-020

Publication date: 1953-06-01

More about this publication?
  • Published since 1929, this monthly journal reports on primary research contributed by respected international scientists in the broad field of zoology, including behaviour, biochemistry and physiology, developmental biology, ecology, genetics, morphology and ultrastructure, parasitology and pathology, and systematics and evolution. It also invites experts to submit review articles on topics of current interest.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free ContentFree content
  • Partial Free ContentPartial Free content
  • New ContentNew content
  • Open Access ContentOpen access content
  • Partial Open Access ContentPartial Open access content
  • Subscribed ContentSubscribed content
  • Partial Subscribed ContentPartial Subscribed content
  • Free Trial ContentFree trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more