Key to Asian Crematogaster ranavalonae group species

This worker key is based on: Hosoishi, S. 2015. Revision of the Crematogaster ranavalonae-group in Asia, with description of two new species (Hymenoptera, Formicidae). Journal of Hymenoptera Research 42, 63-92.

This key does not include: C. augusti, known only from the queen caste; C. vandermeermohri, whose type specimens were not examined; and members of this species group occurring beyond the geographic area delimited by Hosoishi in this revision (a list of these species).

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• Crematogaster
• Crematogaster ranavalonae group

1

Hosoishi 2015. Figures 8-25.

• Scape with sparse setae (Fig. 8). Propodeal spiracles as small as mesothoracic spiracles (Fig. 10) . . . . . Crematogaster aberrans

Crematogaster aberrans

• Scape with abundant setae (Fig. 9). Propodeal spiracles large; diameter ca. 2 × as large as mesothoracic spiracles (Fig. 11) . . . . . 2

2

return to couplet #1

• Postpetiole markedly bilobed laterally, more than 2 × as broad as long (PpWI 212–236) (Fig. 12) . . . . . 3

• Postpetiole moderately bilobed laterally, generally ca. 1.2 to 2 × as broad as long (PpWI 125-200) (Figs 13, 14) . . . . . 4

3

return to couplet #2

• Propodeal spines short; their length equal to or shorter than diameter of propodeal spiracles (Fig. 15) . . . . . Crematogaster dalyi

Crematogaster dalyi

• Propodeal spines long; distinctly longer than diameter of propodeal spiracles (Fig. 16) . . . . . Crematogaster sikkimensis

4

return to couplet #2

• Propodeal spines not developed, reduced to small tubercles (Figs 17, 18) . . . . . 5

• Propodeal spines developed (Fig. 11) . . . . . 6

5

return to couplet #4

• Propodeal spiracles circular (Fig. 17). Petiole about as broad as or broader than long (PtWI 96–109) (Fig. 19) . . . . . Crematogaster hashimi

• Propodeal spiracles elliptical (Fig. 18). Petiole longer than broad (PtWI 88- 92) (Fig. 20) . . . . . Crematogaster imperfecta

6

return to couplet #4

• Anterolateral portion of petiole developed laterally and spiracles on petiole located on lower position and directed ventrally (Fig. 21) . . . . . Crematogaster daisyi

• Anterolateral portion of petiole developed laterally, but spiracles on petiole located on middle portion and directed laterally (Fig. 22) . . . . . 7

7

return to couplet #6

• Anterolateral corners of petiole angulate, anterior face developed (Fig. 23) . . . . . Crematogaster butteli

Crematogaster butteli

• Anterolateral corners of petiole rounded, anterior face sinuate (Fig. 13) . . . . . 8

8

return to couplet #7

• Propodeal spines short and stout; as long as diameter of propodeal spiracles (Fig. 24) . . . . . Crematogaster tumidula

Crematogaster tumidula

• Propodeal spines long; distinctly longer than diameter of propodeal spiracles (Fig. 25) . . . . . 9

9

return to couplet #8

• Anterolateral corners of petiole undeveloped, tapering anteriorly (Fig. 13). Postpetiole generally as wide as petiole in dorsal view (WI 96–100) . . . . . Crematogaster ebenina

• Anterolateral corners of petiole developed (Fig. 14). Postpetiole wider than petiole in dorsal view (WI 103-115) . . . . . Crematogaster pia

Crematogaster pia