Hosoishi, Shingo

Maruyama, Munetoshi

Ogata, Kazuo

English

Sydney eScholarship

 P112 Molecular phylogeny and character evolution of Crematogaster inflata-group Shingo Hosoishi, Munetoshi Maruyama, Kazuo Ogata  A recent molecular phylogeny of the genus Crematogaster reclassified some members of the former subgenera Paracrema and Physocrema into the C. inflata-group, comprising five species: C. subcircularis, C. inflata, C. onusta, C. ampullaris and C. modiglianii. Molecular analysis of the Crematogaster inflata-group and seven other species of former subgenus Physocrema (C. aurita, C. difformis, C. mucronata, C. physothorax, C. sewardi, C. tanakai, C. vacca) were investigated using a total of 1425 bp of sequence data from four nuclear protein-coding genes (long wave length rhodopsin, arginine kinase, carbamoylphosphate synthase, wingless). Monophyly of the C. inflata-group was strongly supported, but rejected for the former subgenus Physocrema. These findings suggest that a swollen propodeum and a circular-shaped metapleural gland opening are not synapomorphic characters for all members of the  former subgenus Physocrema. Two morphologically distinct subgroups, the C. difformis-subgroup (C. ampullaris, C. difformis, C. sewardi, C. tanakai) and the C. inflata-subgroup (C. aurita, C. inflata, C. onusta, C. physothorax) were also supported by the molecular phylogeny. The Crematogaster difformis-subgroup is distinguished by a moderately swollen propodeum, and the C. inflata-subgroup by a strongly swollen propodeum. Phylogenetic analysis thus supports the loss of propodeal spines in these two independent lineages, and also indicated the reduction in the number of antennal club from four to three segments in C. mucronata. In addition, cytochrome oxidase I (COI) sequence data (711 bp) supports the species status of Crematogaster tanakai, which is unique in having a swollen yellow-colored head and was first discovered inhabiting the same nest with C. difformis (5.5 % COI divergence between the two species).   

Molecular phylogeny and character evolution of Crematogaster inflata-group

https://ses.library.usyd.edu.au/bitstream/2123/11237/2/P112.pdf

Molecular phylogeny and character evolution of Crematogaster inflata-group

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