Zoological Letters
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Correction: Deep-sea ctenostome bryozoans: revision of the family Pachyzoidae, with description of a new genus and three new species from Zealandia
Zoological Letters - - 2024
Paedomorphosis in the Ezo salamander (Hynobius retardatus) rediscovered after almost 90 years
Zoological Letters - Tập 7 - Trang 1-9 - 2021
Although paedomorphosis is widespread across salamander families, only two
species have ever been documented to exhibit paedomorphosis in Hynobiidae. One
of these two exceptional species is Hynobius retardatus in which paedomorphosis
was first reported in 1924, in specimens from Lake Kuttara in Hokkaido. This
population became extinct after the last observation in 1932; since then, no
paedomorphs ...
Evidence for a cordal, not ganglionic, pattern of cephalopod brain neurogenesis
Zoological Letters - Tập 1 - Trang 1-13 - 2015
From the large-brained cephalopods to the acephalic bivalves, molluscs show a
vast range of nervous system centralization patterns. Despite this diversity,
molluscan nervous systems, broadly considered, are organized either as medullary
cords, as seen in chitons, or as ganglia, which are typical of gastropods and
bivalves. The cephalopod brain is exceptional not just in terms of its size; its
rela...
X-ray imaging of a water bear offers a new look at tardigrade internal anatomy
Zoological Letters - Tập 5 - Trang 1-11 - 2019
Tardigrades (water bears) are microscopic invertebrates of which the anatomy has
been well studied using traditional techniques, but a comprehensive
three-dimensional reconstruction has never been performed. In order to close
this gap, we employed X-ray computed tomography (CT), a technique that is
becoming increasingly popular in zoology for producing high-resolution,
three-dimensional (3D) scans...
Combined pigmentary and structural effects tune wing scale coloration to color vision in the swallowtail butterfly Papilio xuthus
Zoological Letters - Tập 1 - Trang 1-10 - 2015
Butterflies have well-developed color vision, presumably optimally tuned to the
detection of conspecifics by their wing coloration. Here we investigated the
pigmentary and structural basis of the wing colors in the Japanese yellow
swallowtail butterfly, Papilio xuthus, applying spectrophotometry,
scatterometry, light and electron microscopy, and optical modeling. The about
flat lower lamina of the...
The phylum Vertebrata: a case for zoological recognition
Zoological Letters - Tập 4 - Trang 1-20 - 2018
The group Vertebrata is currently placed as a subphylum in the phylum Chordata,
together with two other subphyla, Cephalochordata (lancelets) and Urochordata
(ascidians). The past three decades, have seen extraordinary advances in
zoological taxonomy and the time is now ripe for reassessing whether the
subphylum position is truly appropriate for vertebrates, particularly in light
of recent advance...
The importance of being integrative: a remarkable case of synonymy in the genus Viridiscus (Heterotardigrada: Echiniscidae)
Zoological Letters - Tập 7 - Trang 1-10 - 2021
There are two predominant sources of taxonomically useful morphological
variability in the diverse tardigrade family Echiniscidae: the internal
structure and surface sculpture of the cuticular plates covering the dorsum
(sculpturing) and the arrangement and morphology of the trunk appendages
(chaetotaxy). However, since the appendages often exhibit intraspecific
variation (they can be reduced or c...
Developmental fates of shark head cavities reveal mesodermal contributions to tendon progenitor cells in extraocular muscles
Zoological Letters - Tập 7 - Trang 1-11 - 2021
Vertebrate extraocular muscles (EOMs) function in eye movements. The EOMs of
modern jawed vertebrates consist primarily of four recti and two oblique muscles
innervated by three cranial nerves. The developmental mechanisms underlying the
establishment of this complex and the evolutionarily conserved pattern of EOMs
are unknown. Chondrichthyan early embryos develop three pairs of overt
epithelial c...
Evolutionary and developmental understanding of the spinal accessory nerve
Zoological Letters - Tập 1 Số 1 - 2015
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