THE ANIMAL FILES

Thylacine

Thylacinus cynocephalus

A tiger name, a wolf-like outline, and a marsupial pouch.

The thylacine illustrates why resemblance and relatedness must be separated. Its stripes inspired a tiger name and its body recalled a dog, yet it was a marsupial. Preserved specimens, photographs and film allow parts of its anatomy to be studied, while extinct-animal behaviour requires particular care about what the evidence can actually show.[1]

Follow the evidence ↓
Thylacine
Image: Baker; E.J. Keller. · Commons · Public domain
Mammal group
A marsupial, not a dog or cat[1]
Coat pattern
Dark stripes across the back and rump[1]
Female structure
A rear-opening pouch for young[1]

Similar outlines can have different histories

The thylacine’s dog-like shape and skull resemblance do not place it within the dog family. It belonged to a marsupial lineage, while the tiger nickname refers to its dark body stripes.[1]

The pouch records another kind of development

Females carried very young offspring in a pouch that opened toward the rear. Historical accounts and preserved young show that the juveniles changed considerably before becoming independent.[1]

An extinct animal needs evidence labels

Descriptions draw on skins, skeletons, museum specimens and surviving photographs or film. These sources reveal different things: a specimen can document body structure, while a film records particular movements in a particular setting.[1]

A COMMON MIX-UP

Was the Tasmanian tiger a kind of tiger?

No. The name refers to stripes rather than membership in the cat family. Likewise, a wolf-like outline does not make it a canid; the thylacine was a marsupial with a different evolutionary history.[1]

TRY A LITTLE REASONING

Why might a preserved young animal change an interpretation based on adults?

Reveal the explanation

Development exposes features that an adult silhouette can hide. Pouch young provide evidence about reproduction and growth, helping distinguish evolutionary relationship from the superficial similarity of mature bodies that perform comparable tasks.[1]

Sources & editorial notes

Adapted and translated from the cited Wikipedia revisions, with source-linked reasoning. Image credit and licence are listed separately above.

Adapted and translated from Wikipedia contributors; exact revisions are linked below. CC BY-SA 4.0

  1. Wikipedia contributors — Thylacine (fixed revision; adapted and translated)
  2. NCBI Taxonomy — Thylacinus cynocephalus (identity and classification)

Last fact check:

One discovery leads to another

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