Through our literature review, we found 572 unique scientific records of individuals displaying leucism among the chordate
classes Chondrichthyes, Actinopterygii, Amphibia, Reptilia, Aves, and Mammalia (Fig.
We thank Marco Corrales for the identification of the chordates
. All sample collections were carried out with the permission from La Amistad-Caribe Conservation Area and Cahuita National Park administration.
mydas in Sechura Bay had an omnivorous diet and foraged on a variety of resources, but mainly on animal prey items like mollusks, arthropods and chordates
. They did not appear to focus on any particular prey species.
The first model was developed on the basis of the examination of vertebrate history and the study of ancient chordates
and suggests that the primary function of the ancestral gene that gave rise to the GH/PRL family was GH-like; that is, its original activity was to regulate somatic growth, while PRL activity evolved later, perhaps to allow for the colonization of FW habitats.
(17) At some point between the origin of chordates
and that of jawed vertebrates, an entire genome was duplicated at two different times.
The topics there are viruses, bacteria, and archaea; protists--the simplest eukaryotes; the land plants; fungi; animal evolution among the invertebrates and among the chordates
; and human evolution.
The brain is an ancient structure, and the anterior placode has been considered to be an innovation of vertebrates or chordates
. As stated in Fig.
Humans are part of a group of animals called chordates
, whose defining feature is a rod of cartilage that runs lengthwise along the middle of their body, under their spinal chord.
Deshler, "A ubiquitous and conserved signal for RNA localization in chordates
," Current Biology, vol.
Hemichordates also share many of the same characteristics as chordates
- a group of animals that includes humans - with the name hemichordate roughly translating to 'half a chordate
The truth is that science has not even begun to uncover all the myriad ways in which the small spineless creatures that inhabit every corner of the earth render the planet hospitable to we chordates
. What we do know is that if our species doesn't put vastly more backbone into mitigating human threats to the health of invertebrates, the ecosystems on which both we and they depend risk being irreversibly compromised.
(2007) described that N-T's TR specific motif are present in chordates
in the variable A/B domain (Figs.
Hundreds of thousands of fossils representing a myriad of species of soft-bodied algae, sponges, worms (annelids and priapulids), primitive arthropods (a group that today includes insects and shrimps), and primitive members of the group humans belong to, the chordates
, have been collected.
At some point in their development from embryo to adult, all chordates
have a "notocord", a flexible rod supporting a nerve cord running down the back.