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The larva of some bryozoans is a spheroidal trochophore, while other bryozoans
may have a flattened trochophore (Fig. 7.2a) or a laterally compressed larva with
a triangular, bivalved shell, called a cyphonautes (Fig. 2.1i). Trochophore larvae
...
2
Biology of the Hard Clam
In 12-14 h, at room temperature, the embryo, now an early pear-shaped
trochophore, and more elongated in form than the gastrula, escapes and swims
away from the gelatinous envelope in a spiral path. How escape occurs, has not
been ...
John Norman Kraeuter, Michael Castagna, 2001
3
Horizontal Gene Transfer
Others spend weeks in the plankton either as a trochophore or as a shelled larva
called a cyphonautes, and, in these cases, the subsequent metamorphosis is
drastic. The larva, whether trochophore or cyphonautes, has well developed ...
Michael Syvanen, Clarence I. Kado, 2001
THE FINE STRUCTURE OF THE TROCHOPHORE OF HARMOTHOE
IMBRICATA P. L. HOLBOROW Gatty Marine Laboratory, University of St Andrews
, Scotland INTRODUCTION The annelid trochophore has been studied with the
light ...
A generalized trochophore larva. Molluscs and annelids with primitive embryonic
development have trochophore larvae, as do several other phyla. Most molluscs
have a pair of kidneys (metanephridia), a type of nephridium in which the inner ...
Cleveland P. Hickman, Larry S. Roberts, Allan Larson, 2003
The trochophore theory, elaborately developed by Hatschek (1857), is to the
effect that the trochophore is the larva of an ancestral form, the irochozoon, which
was the common ancestor of most, if not all, the bilateral phyla, and which, of
living ...
7
The Ultrastructure and Phylogeny of Insect Spermatozoa
Onychophora appear to have diverged from the annelidan-arthropodan line at a
very remote period, before the modern annelids had acquired a characteristic
trochophore larva (my italics). Whether protoannelids possessed a trochophore
or ...
Barrie Gillean Molyneux Jamieson, 1987
8
Practical Handbook of Marine Science, Third Edition
Polyplacophora Trochophore Aplacophora Trochophore Bivalvia Trochophore,
veliger, pericalymma Scaphopoda Trochophore and veliger Cephalopoda
Incomplete None Arthropoda Superficial/holoblastic spiral Merostomata Trilobite
...
9
Invertebrate Relationships: Patterns in Animal Evolution
But if the mouth appears below the ring we have a trochophore, even though the
secondary nature of the mouth should characterise a deuterostome. It is probably
true that the relation between ciliary bands and mouth is much more variable ...
10
Zooplankton of the Atlantic and Gulf Coasts: A Guide to ...
Late Trochophore Larva The trochophore larva is recognized by its ciliary bands.
The example shown is typical, but there is considerable variability in appearance
among different polychaete families. The ciliary bands gradually disappear.
William S. Johnson, Dennis M. Allen, 2012
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Mantle margin morphogenesis in Nodipecten nodosus (Mollusca …
Periostracum and shell secretion (grey) is continuous throughout development since the onset of shell field formation in the trochophore stage. Both muscle (red) ... «BMC Blogs Network, 五月 15»
Where am I? > Home > Wildlife > Leeches...and Limpets...and Wo...
... segmented worms and even earthworms, most of which develop from an egg to an intermediate larval stage called a trochophore before metamorphosing to ... «Environmental News Network, 十二月 12»
New genomes hint at evolution's slimy past
This scanning electron microscope image shows an 18-hour-old trochophore of the owl limpet, Lottia gigantea. (Credit: Eric Edsinger-Gonzales, UC Berkeley). «Futurity: Research News, 十二月 12»
What do leeches, limpets and worms have in common?
Scanning electron microscope image of an 18-hour-old trochophore of the owl limpet, Lottia gigantea. Image courtesy of Eric Edsinger-Gonzales, UC Berkeley. «UC Berkeley, 十二月 12»
Giant clam (Tridacna gigas)
The fertilised eggs quickly enter a swimming stage (where they are known as trochophores), before entering a planktonic stage. During this stage, the larvae, ... «ARKive, 四月 11»
Clams: the wonder of their reproduction
The first stage of larval clamhood is known as a trochophore, these look like little flying saucers or tops with a fringe of cilia (tiny hairs) around the edge. «Seacoastonline.com, 六月 09»
Acoel development indicates the independent evolution of the …
Our results indicate that the expression in the foregut of the trochophore and tornaria larva was inherited from a bilaterian ancestor in which a larval form was ... «Nature.com, 九月 08»
Horizontal endosymbiont transmission in hydrothermal vent …
We examined several segmented trochophore larvae (200–250 µm in length) (Supplementary Fig. 1). These animals had a larval locomotory ciliary girdle ... «Nature.com, 五月 06»
