-
which had a
superficial resemblance to the Osteostraci, had an
elongate headshield, that,
coupled with its spear-like rostrum, gave it a throwing-dart-like...
- The
order Cephalaspidea, also
known as the
headshield slugs and
bubble snails, is a
major taxon of sea
slugs and
bubble snails,
marine gastropod mollusks...
-
characterized by a
large median dorsal opening in the
anterior part of the
headshield that
serves as both a
common nostril and the main
water intake device...
-
anteriorly positioned headshield, and a trunkshield. A pair of antennae-like
structures emanate from
underneath the base of the
headshield, and
there are numerous...
- of
unstalked eyes on the top of the
headshield and pair of
stalked eyes
attached to the underside. The
headshield also has four
pairs of
biramous (two...
-
Tubulophilinopsis gardineri, the Gardiner’s philinopsis, or Gardiner's
headshield slug is a
species of sea slug, a s****-less
opisthobranch gastropod mollusc...
- "medium-sized"
dorsal spine.
Plates covering the
headshield had
ridges of dentine. It is
theorized that the
headshield formed in
youth and that it grew via growth...
-
marine opisthobranch gastropod mollusc in the
order Cephalaspidea, the
headshield slugs. This
species has a
maximum size of 70 mm. The
background color...
-
gastropods that are
often labeled as "sea slugs" are the
various families of
headshield slugs and
bubble snails within the
clade Cephalaspidea. The sea hares...
- The
largest known osteostracan is Parameteoraspis, its crescent-shaped
headshield was 35 to 40 cm wide. They were
probably relatively good swimmers, possessing...
