Carpals of Swamp Wallaby – Wallabia bicolor

Carpals of Swamp Wallaby (Wallabia bicolor) are from left wrist of a male wallaby 1.65 m from head to tail tip unless noted otherwise.

Unlike humans, the swamp wallaby has seven carpal bones, not eight (the scaphoid and lunate form a single scapholunar bone). The trapezoid is tiny (5 mm long). They are different to kangaroo. Captions below photos.

Wallabia bicolor overview

Wallabia bicolor overview.JPG

Wallabia bicolor carpals apr 2006Wallabia bicolor carpals apr 2006.JPG

Wallabia bicolor carpals in order

Wallabia bicolor carpals in order.JPG

Wallabia bicolor ulna tip in triquetral
Wallabia bicolor ulna tip in triquetral.JPG

Wallabia bicolor scapholunar still bound

Wallabia bicolor scapholunar still bound.JPG

Wallabia bicolor joint capsule scapholunar hamate 2

Wallabia bicolor joint capsule scapholunar hamate 2.JPG

Wallabia bicolor joint capsule scapholunar hamate
Wallabia bicolor joint capsule scapholunar hamate.JPG

Wallabia bicolor left scapholunars

Wallabia bicolor left scapholunars.JPG

Wallabia bicolor two left scapholunars
Wallabia bicolor two left scapholunars.JPG

Wallabia bicolor triquetrals

Wallabia bicolor triquetrals.JPG

Wallabia bicolor trapeziums
Wallabia bicolor trapeziums.JPG

Wallabia bicolor trapeziums 2

Wallabia bicolor trapeziums 2.JPG

Wallabia bicolor trapezoid
Wallabia bicolor trapezoid.JPG

Wallabia bicolor left trapezoids

Wallabia bicolor left trapezoids.JPG

Wallabia bicolor left capitates
Wallabia bicolor left capitates.JPG

Wallabia bicolor capitate and trapezoid separating

Wallabia bicolor capitate and trapezoid separating.JPG

Wallabia bicolor capitates
Wallabia bicolor capitates.jpg

Wallabia bicolor left hamates

Wallabia bicolor left hamates.JPG

Wallabia bicolor hamate separating
Wallabia bicolor hamate separating.JPG

Wallabia bicolor distal carpal row hamate on left

Wallabia bicolor distal carpal row hamate on left.JPG

Wallabia bicolor distal row without hamate

Wallabia bicolor distal row without hamate.JPG

Wallabia bicolor second carpal row
Wallabia bicolor second carpal row.JPG

Wallabia bicolor distal row stepped metacarpals

Wallabia bicolor distal row stepped metacarpals.JPG

miscellaneous bones t

miscellaneous bones t.jpg

Mnemonic for wrist bones of mammals and their order in the two carpal rows:

Sally Left The Party, To Take Cathy Home

(1st, upper, medial, proximal row = scaphoid, lunate aka semi-lunar, triquetral aka cuneiform, pisiform)

(2nd , lower, distal row = trapezium, trapezoid, capitate aka os magnum, hamate aka unciform hook shaped)

Swamp Wallaby is in Class Mammalia, Subclass Marsupialia (Metharians also include Marsupials), Order Diprotodontia (Koalas, Wombats, Possums, Macropods), Superfamily Macropodoidea, Family Macropodidae (Wallabies, kangaroos, tree-kangaroos), Subfamily Macropodinae, Genus Wallabia, Species bicolor. This classification is from: Mammals of Australia, Editor Ronald Strahan, revised edition, Reed New Holland Publishers, Sydney, 1995, which says “A combination of genetic, reproductive, dental and behavioural characteristics set the Swamp Wallaby so far apart from other wallabies that it is classified as the sole living member of the genus Wallabia.” p409. This is debated because it can hybridize with Macropus agilis (agile wallaby) so perhaps should be placed in the genus Macropus.

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