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.JPG
Wallabia bicolor carpals in order.JPG
Wallabia bicolor scapholunar still bound.JPG
Wallabia bicolor joint capsule scapholunar hamate 2.JPG
Wallabia bicolor left scapholunars.JPG
Wallabia bicolor triquetrals.JPG
Wallabia bicolor trapeziums 2.JPG
Wallabia bicolor left trapezoids.JPG
Wallabia bicolor capitate and trapezoid separating.JPG
Wallabia bicolor left hamates.JPG
Wallabia bicolor distal carpal row hamate on left.JPG
Wallabia bicolor distal row without hamate.JPG
Wallabia bicolor distal row stepped metacarpals.JPG
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.