The Ants of Africa
Genus Crematogaster
Crematogaster (Crematogaster) rivai Emery

Crematogaster (Crematogaster) rivai Emery

return to key {link to the Hymenoptera Name Server}Type location Ethiopia (C. Rivai n. sp., Emery, 1897e: 598, illustrated, worker) from Ganana; in spines of Acacia larin - see below
junior synonym (here) luctuosa (Menozzi, 1930b: 96, illustrated, worker) from Ethiopia - see http://www.antweb.org/specimenImages.do?code=casent0912719
worker only described (see Bolton, 1995) .


{Crematogaster rivai}Emery's (1897e) description is at {original description}. Menozzi's (1930b) description of luctuosa is at {original description}; Menozzi also gave a description of the nest on Acacia bussei and its construction of carton - see Nest page 1 and Nest page 2.


{Crematogaster rivai} The photomontage of a type collection (minor) worker is collated from http://www.antweb.org/specimen.do?name=casent0904516


Oxford University Museum specimens

Crematogaster (Crematogaster) rivai
B Taylor det.
Sudan
J Mathews
JM 072

23.x.2000
Kordofan
1121' N
3427' E
El Ain near El Obeid
pyrethrum fogging of Senegalia senegal
3
{album}
Crematogaster (Crematogaster) rivai
B Taylor det.
Sudan
J Mathews
JM 075
23.x.2000
Kordofan
1121' N
3427' E
El Ain near El Obeid
pyrethrum fogging of Senegalia senegal

1

Crematogaster (Crematogaster) rivai
B Taylor det.
Sudan
J Mathews
JM 078

23.x.2000
Kordofan
1121' N
3427' E
El Ain near El Obeid
pyrethrum fogging of Senegalia senegal
5
{album}
Crematogaster (Crematogaster) rivai
B Taylor det.
Sudan
J Mathews
JM 091

23.x.2000
Kordofan
1121' N
3427' E
El Ain near El Obeid
pyrethrum fogging of Senegalia senegal
1
{album}
Crematogaster (Crematogaster) rivai
B Taylor det.
Sudan
J Mathews
JM 276
30.vi.2001
Khordonia
1151' N
3415' E
Damazine Plantation, Blue Nile semi-natural forest; pyrethrum fogging of Senegalia senegal
1
{album}

Crematogaster rivai majorThe photomontage is of a major specimen from Sudan, collected by J Mathews, by pyrethrum fogging of Senegalia senegal (formerly Acacia senegal); Kordofan, El Ain, near El Obeid, ca 1256' N 3035' E, JM 072, 23.x.2000, 3 workers (selected as representative of the polymorphism) plus very many unmounted; also JM 040, 2 workers, 18.x.2000; JM 078, 6 workers plus ca 80 unmounted, 24.x.2000; and, JM 091, 25.x.2000, 1 worker plus 13 unmounted. Note almost all the workers seemed to be covered in a flaky material, possibly of the gum of the host Senegalia senegal. The 4-segmented antennal club is quite distinct but the colour is intermediate between the uniform dark brown of the type and the Menozzi almost uniform black of luctuosa.


Crematogaster rivai majorThe photomontage is of a major worker from Sudan, JM 091.


Crematogaster rivai mediaThe photomontage is of a media worker from Sudan, JM 078.


Crematogaster rivai minimaThe photomontage is of a minima worker from Sudan, JM 078.

Contents
2007, 2008, 2010, 2013, 2015, 2016 - Brian Taylor CBiol FRSB FRES
11, Grazingfield, Wilford, Nottingham, NG11 7FN, U.K.

href="crematogaster_rivai.htm"