OLIGOMERIZATION IN COPEPODA CYCLOPOIDA AS A KIND OF ORTHOGENETIC EVOLUTION IN THE ANIMAL KINGDOM BY V. I. MONCHENKO 1 ) and J. C. VON VAUPEL KLEIN 2 ) 1 ) Institute of Zoology of the National Academy of Sciences, B. Khmelnitsky str., 15, UA-252601 Kiev-30, Ukraine 2 ) Division of Systematic Zoology at Leiden University, c/o National Museum of Natural History, P.O. Box 9517, NL-2300 RA Leyden, The Netherlands ABSTRACT The morphological-evolutionary notions on oligomerization (i.e., reduction in numbers of seg- ments) of the thoracic limbs and the ® rst antenna in Copepoda Cyclopoida are examined in detail. It is shown that the process of oligomerization is correlated to a large extent with a decrease in body length. The oligomerization of the thoracic limbs is evolutionarily irreversible, thus capable of channeling the further pathways of morphological development. Consequently, its successive steps in phylogenetic lineages are considered to represent a kind of orthogenetic evolution. R Â ESUM Â E Les notions morphologiques- Â evolutionnaires sur l’ oligom Â erisation (c’ est- Á a-dire sur la r Â eduction du nombre des segments) des pattes thoraciques et de la premi Á ere antenne chez les Cop Â epodes Cyclopoida sont
Crustaceana – Brill
Published: Jan 1, 1999
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera