-
ancestral arthropod. Only two
fossil species are
confidently ****igned as
onychophorans:
Antennipatus from the Late Carboniferous, and
Cretoperipatus from the...
-
priapulids and
onychophorans,
there is a
layer of
outermost circular muscles and a
layer of
innermost longitudinal muscles. The
onychophorans also have a...
- the term "Lobopodia" is
sometimes expanded to
include tardigrades and
onychophorans as well.
Common characteristics of the
Panarthropoda include a segmented...
-
modern onychophorans. On the
other hand, some
analysis rather support the
position of
Hallucigenia as a
basal panarthropod outside of
onychophoran stem-group...
- have a
single pair of
tapering annulated legs
similar to the
modern onychophoran, but
without specialized feet and claws. More than 10 body
segments were...
- Smith,
Martin R.; Ortega-Hernández,
Javier (2014). "Hallucigenia's
onychophoran-like
claws and the case for Tactopoda" (PDF). Nature. 514 (7522): 363–366...
- evident. A pair of legs
marks the
posterior end of the body,
unlike in
onychophorans where the ****
projects posteriad; this may be an
adaptation to the...
-
Burgess shale.
Extant phyla in
these rocks include molluscs, brachiopods,
onychophorans, tardigrades, arthropods,
echinoderms and hemichordates,
along with...
- Smith,
Martin R.; Ortega-Hernández,
Javier (2014). "Hallucigenia's
onychophoran-like
claws and the case for Tactopoda" (PDF). Nature. 514 (7522): 363–366...
-
certain groups. A
respiratory and
circulatory system is only
present in
onychophorans and
arthropods (often
absent in
smaller arthropods like mites); in the...
