Key to Crematogaster Physocrema species

AntWiki - Where Ant Biologists Share Their Knowledge
Jump to: navigation, search

This worker key is based on: Hosoishi, S. & Ogata, K. 2009b. A taxonomic revision of the Asian endemic subgenus Physocrema of the genus Crematogaster. Zootaxa 2062: 15-36. PDF

Most Physocrema species show strong polymorphism in size and sculpture. Large workers are typically more useful than smaller workers for indentification, particularly in closely similar species.

You may also be interested in

1

  • Propodeal spines developed and with pointed apices . . . . . 2
  • Propodeal spines undeveloped and forming obtuse lobes . . . . . 4

2

return to couplet #1

  • Antennal club 3-jointed. Pronotum raised steeply toward mesonotum in lateral view . . . . . Crematogaster mucronata
Crematogaster mucronata casent0904532 p 1 high.jpg
  • Antennal club 4-jointed. Pronotum raised moderately toward mesonotum in lateral view . . . . . 3

3

return to couplet #2

  • In lateral view, pronotum and mesonotum forming a single convexity, propodeum distinctly raised relative to promesonotum, metanotal groove deep . . . . . Crematogaster vacca
Crematogaster vacca casent0908465 p 1 high.jpg
  • In lateral view, pronotum and mesonotum forming a single convexity, propodeum slightly raised relative to promesonotum, metanotal groove less deep . . . . . Crematogaster yamanei
Crematogaster yamanei casent0905904 p 1 high.jpg

4

return to couplet #1

Crematogaster-tanakai-lateral-am-lg.jpg

5

return to couplet #4

  • Propodeal spiracle situated near the metapleural gland orifice, the distance between them about the same as the propodeal spiracle diameter (Fig. 4) . . . . . 6
  • Propodeal spiracle situated away from the metapleural gland orifice, the distance between them much greater than the propodeal spiracle diameter (Fig. 3) . . . . . 9
Hosoishi and Ogata 2014. Figure 3,4.

6

return to couplet #5

Crematogaster inflata casent0193621 p 1 high.jpg
Hosoishi and Ogata 2014. Figure 1,2.

7

return to couplet #6

  • Dorsal face of head strongly striated with abundant longitudinal rugulae. Scape not reaching posterior corner of head in large workers. Workers with pronounced size polymorphism . . . . . Crematogaster aurita
Crematogaster-aurita-lateral-am-lg.jpg
  • Dorsal face of head not strongly striated with longitudinal rugulae. Scape reaching posterior corner of head. Workers monomorphic in size . . . . . 8

8

return to couplet #7

Hosoishi and Ogata 2014. Figure 6,7.
Crematogaster physothorax casent0217851 p 1 high.jpg
  • The posterior portion of pronotum without distinct rugulae in dorsal view (Fig. 7) . . . . . Crematogaster onusta
Crematogaster onusta casent0193714 p 1 high.jpg

9

return to couplet #5

  • Dorsal setae on posterior portion of fourth abdominal tergite directed medially (Fig. 8) . . . . . Crematogaster difformis
Crematogaster-difformisL2.5.jpg
  • Dorsal setae on fourth abdominal tergite directed posteriorly (Fig. 9) . . . . . 10
Hosoishi and Ogata 2014. Figure 8,9.

10

return to couplet #9

  • In lateral view, dorsal profile of promesonotum convex, propodeum distinctly raised relative to promesonotum, metanotal groove very deep . . . . . Crematogaster sewardi
Crematogaster sewardi casent0908464 p 1 high.jpg
  • In lateral view, dorsal profile of promesonotum convex, propodeum slightly raised relative to promesonotum, metanotal groove not so deep in dorsal median portion . . . . . Crematogaster ampullaris
Crematogaster ampullaris casent0193577 p 1 high.jpg