The Life-Cycle of Peltogasterella (Cirripedia, Rhizocephala) 1)

The Life-Cycle of Peltogasterella (Cirripedia, Rhizocephala) 1) THE LIFE-CYCLE OF PELTOGASTERELLA (CIRRIPEDIA, RHIZOCEPHALA) 1) BY RYUZO YANAGIMACHI Zoological Institute, Hokkaido University, Sapporo, Japan All the known Rhizocephala except a few species belonging to the family Sylonidae have been described as hermaphroditic animals. In 1958, Ichikawa and Yanagimachi reported that Peltogasterella gracilis ( Boschma ) ( syn. Peltoga.rterella .rociali.r Kruger; cf. Reischman, 1959) is not a hermaphrodite, but is structurally a female. The "testes" of this rhizocephalan are actually female organs which function as a reservoir to hold the cells of the larval cypris male. Ichikawa and Yanagimachi suggested that the "testes" should be called "spermathecae" (Ichika- wa and Yanagimachi, 1958 ) or "cypris-cell receptacles" (Ichikawa and Yanagi- machi, 1960 ) . Recently, the following facts have been elucidated in Peltoga.rterella gracili.r: (1) An adult female produces exclusively either large eggs (160-170 p. in diam- eter) or small eggs (140-150 1-t in diameter). Females on a single host-crab are uniformly either "large-egg-producing" or "small-egg-producing." (2) The large eggs develop into large larvae, while the smaller eggs develop into small larvae. In the nauplius stage, the two types of the larvae are distinguishable only by their size. In the cypris stage, however, the larvae differ not only http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crustaceana Brill

The Life-Cycle of Peltogasterella (Cirripedia, Rhizocephala) 1)

Crustaceana, Volume 2 (3): 183 – Jan 1, 1961

Loading next page...
 
/lp/brill/the-life-cycle-of-peltogasterella-cirripedia-rhizocephala-1-iM3w2D77qQ
Publisher
Brill
Copyright
© 1961 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0011-216x
eISSN
1568-5403
D.O.I.
10.1163/156854061X00158
Publisher site
See Article on Publisher Site

Abstract

THE LIFE-CYCLE OF PELTOGASTERELLA (CIRRIPEDIA, RHIZOCEPHALA) 1) BY RYUZO YANAGIMACHI Zoological Institute, Hokkaido University, Sapporo, Japan All the known Rhizocephala except a few species belonging to the family Sylonidae have been described as hermaphroditic animals. In 1958, Ichikawa and Yanagimachi reported that Peltogasterella gracilis ( Boschma ) ( syn. Peltoga.rterella .rociali.r Kruger; cf. Reischman, 1959) is not a hermaphrodite, but is structurally a female. The "testes" of this rhizocephalan are actually female organs which function as a reservoir to hold the cells of the larval cypris male. Ichikawa and Yanagimachi suggested that the "testes" should be called "spermathecae" (Ichika- wa and Yanagimachi, 1958 ) or "cypris-cell receptacles" (Ichikawa and Yanagi- machi, 1960 ) . Recently, the following facts have been elucidated in Peltoga.rterella gracili.r: (1) An adult female produces exclusively either large eggs (160-170 p. in diam- eter) or small eggs (140-150 1-t in diameter). Females on a single host-crab are uniformly either "large-egg-producing" or "small-egg-producing." (2) The large eggs develop into large larvae, while the smaller eggs develop into small larvae. In the nauplius stage, the two types of the larvae are distinguishable only by their size. In the cypris stage, however, the larvae differ not only

Journal

CrustaceanaBrill

Published: Jan 1, 1961

There are no references for this article.

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

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

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

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.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create lists to
organize your research

Export lists, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off