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Subfamilies            

Cerapachyinae

Dolichoderinae

Ecitoninae

Formicinae

Myrmicinae

poneromorphs

Pseudomyrmecinae  

Links

Jack Longino's Ants of Costa Rica

American Museum Social Insects website

William and Emma Mackay Ants of North America site

Gordon and Roy Snelling New World Army Ants

Notes from Underground

sF Myrmicinae Pheidole

This is a diverse group for which the ecology is poorly known. While taxonomy is often based on majors, the field biologist may never see them. This listing of currently known species is thus sorted by Weber's length of workers (WWL), the maximum length of the mesonotum from anterior pronotum to the posterior of propedum. WSI=Worker Scape index (worker scape length/worker head width*100). Consult the execellent work of Longino and Cover for more detail.

Pheidole zeteki

MR Smith 1947

WWL
0.35

WSI

100

Pheidole
MEK-004

Michael Kaspari ms

small ruida-group, with 12 seg. antenna cf JTL-104 but spines are recurved

WWL

0.40

WSI

89

Wheeler 1925

BCI form is dark brownWWL
0.42

WSI
75

Pheidole
perpusilla

Emery 1894

WWL

0.38

WSI

125

Pheidole
multispina

Wilson 2003

Dark, chocolate brown on BCI.
Common

WWL

0.44

WSI

80

Pheidole

asperithorax

Emery 1894

WWL

0.45

WSI

100

Pheidole
christopherseni

Forel 1912

WWL

0.45

WSI

83

Pheidole
glomericeps

Wilson 2003

WWL

0.46

WSI

102

Pheidole
ruida

Wilson 2003

ruida is likely a species complex of the flavens-group

Common

WWL

0.46

WSI

84

Pheidole
MEK-003

Michael Kaspari ms

cf. subarmata but smaller and with foveolate katepisternum and propedum

WWL

0.50

WSI

1.14

Pheidole
rectirudis

Wilson 2003

WWL

0.51

WSI

88

Pheidole
specularis

Wilson 2003

WWL

0.52

WSI

86

Pheidole
rugiceps

Wilson 2003

Common

WWL

0.55

 WSI

132

Pheidole
MEK-006

Michael Kaspari ms

cf arboricola but katepisternum is foveolate and propedum shiny

WWL

0.58

WSI

95

Pheidole
angulifera

Wilson 2003

WWL

0.6

WSI

80

Pheidole
striaticeps

Mayr 1870

WWL

0.61

WSI

88

Pheidole
subarmata

Mayr 1884

WWL

0.61

WSI

100

Pheidole
MEK-002

Michael Kaspari ms

low flat pronotum with triangular propedal spines

WWL

0.62

WSI

1.20

Pheidole
JTL-100

John T Longino ms

BCI form closely matches Guanacaste CR form of Longino

WWL

0.62

 WSI

81

Pheidole
punctatissima

Mayr 1870

WWL

0.65

WSI

 117

Pheidole
JTL-103

John T Longino ms

WWL

0.65

WSI

88

Pheidole
MEK-001

Michael Kaspari ms

cf. carapuna, but with steeper declivitous face on pronotum

WWL

0.70

 WSI

 98

Pheidole
dasypyx

Wilson 2003

Common

WWL

0.72

WSI

140

Pheidole
laticornis

Wilson 2003

WWL

0.73

WSI

156

Pheidole
radozskowskii

Mayr 1884

WWL

0.74

WSI

128

cf diligens

Michael Kaspari ms

Common

WWL

0.75

WSI

141

Pheidole
psilogaster

Wilson 2003

WWL

0.75

WSI

172

Pheidole
sensitiva

Borgmeier 1959

WWL

0.77

WSI

131

Pheidole
simonsi

Wilson 2003

WWL

0.79

WSI

98

WWL

0.8

WSI

Pheidole
cocciphaga

Borgmeier 1934

WWL

0.87

WSI

172

Pheidole
variegata

Forel 1908

WWL

0.93

WSI

181

Pheidole
tanyscapa

Wilson 2003

WWL

0.95

WSI

181

Pheidole
hirsuta

Emery 1896

WWL

1

WSI

155

Pheidole
susannae

Forel 1886

WWL

1

WSI

209

Pheidole
fimbriata

Roger 1863

WWL

1.05

WSI

114

Pheidole
indagatrix

Wilson 2003

WWL

1.1

WSI

172

Pheidole
biolleyi

Forel 1908

WWL

1.12

WSI

151

Pheidole
ajax

Forel 1899

WWL

1.13

WSI

193