EXTERNAL
ANATOMY
(continued)
In Thylacinus, there is a fusion of the three interdigital pads
to form a single, trilobed plantar pad. A long area of bare skin
behind this pad separates it from a carpal pad that is twice as long as
wide. Hair encroaches on the carpal region, but all skin around the
plantar pad is devoid of hair, and the creases between toes 2, 3 and 4
appear granular.
.
| The
left manus of a thylacine skin (female) in the collection of the Australian
Museum in Sydney. Despite the structural differences pointed out
above between the feet of a canid and the thylacine, you can see from this
photo that the nails are in fact very similar in form to those of a dog.
Unlike the sharp, gripping claws of felids, they are nonretractile and
quite blunt. |
|
Ground
contact is made by the digital pads on the tips of the toes and the anterior
area of the plantar pad. Finely pointed papillae (tiny skin projections
which aid in traction) cover these pads.
The
pes
(hind foot) of the thylacine is much longer than the manus. There
is no hallux (the foot's first digit - analogous to the hand's thumb),
but the four remaining toes are long and un-webbed. There is a single
plantar pad which is bilobed posteriorly, but without any trace of a pad
behind it. Instead, hair encroaches on the heel, leaving a long and
narrow patch of naked skin which reaches to the end of the heel. |
The hair of the thylacine is thick, short and rather crisp, with a greyish
brown to yellowish brown hue. There are between 15-20 black or very
dark brown stripes which extend from just behind the shoulders to near
the base of the tail, in a series of unbroken bands.
|
This characteristic type of pattern is shared with only three other living
species of mammals: the Banded hare wallaby (Lagostrophus
fasciatus), the Zebra duiker (Cephalophus
zebra), and the Banded palm civet (Hemigalus
derbyanus) (Renshaw 1938). As is the case with all striped
animals, there is much variation between individuals (Moeller 1968), although
the longest stripes are always those over the rump. From there, they
descend from the hip nearly to the knee, gradually becoming shorter anteriorly
until they disappear. The stripes never extend all the way to the
abdomen. |
.
| A
close-up of the thylacine's coat. From this you can get some impression
of the hair
texture of this species. It is somewhere in between coarse
and soft - rather similar to the coat of a kangaroo. View
detail. Also, you can see an even more magnified view of
the thylacine's coat here. |
|
What appear to be very
faint stripes can occasionally be seen on the tails of thylacines.
However, this is actually an effect of light and shadow across the individual
joints of the tail when viewed from certain angles, and is not due to pigment.
These "pseudo-stripes" are only seen in photographs of living thylacines,
and are not present on preserved specimens such as taxidermies.
.
| Note
that the thylacine's tail gradually tapers from the hindquarters, readily
distinguishing from that of a dog. |
|
The shape of the thylacine's hindquarters is very distinctive. The
tail is not abruptly separated from the body, but tapers gradually, rather
like that of a kangaroo or wallaby. This characteristic feature immediately
distinguishes the thylacine from all canids, and is thus a key feature
to look for in cases of possible sightings of the animal. The tail
is only rather thinly haired, except at the base, and bears a dark tip
and a very slight crest
above and below (Thomas 1888). |
|