Measurements are standard length (SL) 31.5 mm, greatest
depth of body 14.3 mm, approximate diameter of eye 4.0 mm,
distance between tip of snout and base of spiny dorsal fin 13.4
mm, length of base of spiny dorsal fin 7.0 mm (with position of
rear edge of recumbent third dorsal spine estimated as though
it were erected), distance between posterior end of base of spiny
dorsal fin and upper base of caudal fin 16.9 mm, caudal
peduncle depth 4.6 mm, approximate length of caudal fin 7.0
mm (position of rear edge estimated), length of incomplete first
dorsal spine 13.0 mm (based on the thickness and tapering of the preserved portion, the intact length is estimated to be about
23 mm), length of second dorsal spine 19.7 mm, length of third
dorsal spine 13.1 mm, length of pelvic-fin apparatus protruding
from ventral profile of body 4.3 mm, length of incomplete
spine projecting anteriorly from snout 8.8 mm (intact length
perhaps about 10 to 12 mm), length of longest tooth in lower
jaw 1.4 mm, length of longest tooth in upper jaw approximately
0.7 mm.
The body is covered with enlarged scale plates bearing
numerous low tubercles or granulations on their surface, with
the most central tubercle often larger than the others. Although
the peripheral edges of the plates are not well preserved, the
plates appear to have varied from irregularly rounded to almost
hexagonal. The plates are largest and in closest contact with
one another in about the middle of the body, apparently
forming an almost continuous covering of armor in the region
that supports the posteriorly directed carapace spine and the
rudimentary pelvic fin. It is possible that some of the plates
were interdigitated, although there is no evidence of the type of
more extensive suturing that characterizes the carapace of
ostraciids. The scale plates of the head and caudal peduncle are
somewhat smaller than those of the middle of the body and are
more distantly spaced from one another.
Both the median snout spine and the posterior body spine on
each side of the body appear to be processes of the enlarged
dermal scale plates with which they are continuous basally;
thus, both spines were probably fixed and inflexible. Continuing
anteriorly from the base of the posterior body spine is a
ridge along the enlarged scale plates, probably forming a crest
along the body to below the pectoral-fin base. An even more
prominent crest, along what are probably relatively consolidated
scale plates, is present ventrolateral^ from the region of
the base of the rudimentary pelvic fin to the lower region of the
cheek. Because this crest terminates at the base of the pelvic fin,
we suppose that the pelvic girdle, which is not exposed, is
positioned internal to it. The centers of the scale plates along
this crest apparently were especially upraised, forming a
spinous ventrolateral ridge. The snout spine bears shallow
longitudinal grooves and low serrations, while the posterior
body spine appears to be similarly but slightly less ornamented.