Key to Australian Calyptomyrmex Species

The following key to Australian Calyptomyrmex species has been modified from Shattuck (2011 ).

1

 * Hairs on head and body spatulate (noticeably narrower near the body and expanded distally and with a rounded tip) => 2
 * Hairs on head and body thin (essentially the same width along entire length, or only slightly and gradually expanded distally, and with blunt tips) => 6

2

 * Gaster with low longitudinal striations running between the spatulate hairs (Australia) => Calyptomyrmex fragarus
 * Gaster smooth to shallowly punctate => 3

3

 * Propodeum armed with short angular teeth => 4
 * Propodeum unarmed => 5

4

 * In dorsal view node of petiole much broader than long and rectangular in shape; body smaller (head width < 0.82mm) => Calyptomyrmex fritillus
 * In dorsal view node of petiole only slightly broader than long and oval in shape; body larger (head width > 1.00mm) => Calyptomyrmex sparsus

5

 * Hairs on head narrowly spatulate and rising well above the underlying body surface; in dorsal view node of petiole rectangular, in lateral view relatively thin; body smaller (head width < 0.82mm) (Australia) => Calyptomyrmex taylori
 * Hairs on head broadly spatulate and appressed closely to the underlying body surface; in dorsal view node of petiole rounded, in lateral view relatively thick; body larger (head width > 0.90mm) => Calyptomyrmex beccarii

6

 * Gaster heavily sculptured with striations or a network of low rugae => Calyptomyrmex lineolus
 * Gaster weakly (and sometimes indistinctly) punctate => 7

7

 * Mesonotum rugo-reticulate but with rugae running longitudinally; propodeal spines shorter; petiolar node in dorsal view broader and thinner => Calyptomyrmex grammus
 * Mesonotum rugo-reticulate but lacking longitudinal rugae; propodeal spines longer; petiolar node in dorsal view narrower and thicker => Calyptomyrmex ocullatus