Crematogaster bara

Every Ant Tells a Story - And Scientists Explain Their Stories Here
Jump to navigation Jump to search
Crematogaster bara
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species: C. bara
Binomial name
Crematogaster bara
Blaimer, 2013

Crematogaster bara casent0116613 p 1 high.jpg

Crematogaster bara casent0116613 d 1 high.jpg

Specimen Labels

Crematogaster bara has a very narrow distribution range in gallery forest, savannah, Uapaca woodland and spiny forest habitat in southwestern Madagascar. It has been collected at elevations from 30 m to 1100 m, and occurs in sympatry with Crematogaster sewellii, Crematogaster dentata and Crematogaster maina. Not much is known about the biology of this species. One collection has been made of a colony nesting under a stone, indicating that this species may be ground-nesting.

Identification

Blaimer and Fisher (2013) - Crematogaster degeeri assemblage. Crematogaster bara is easily distinguished from all other species of the C. degeeri-assemblage by a combination of the following characters: yellow body color, medium to large size (HW 0.87-1.03, WL 0.98-1.22) and very long antennal scapes (SI 0.91-1.01).

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Malagasy Region: Madagascar (type locality).


Distribution based on AntMaps

AntMapLegend.png

Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Males have yet to be collected.

Worker

Queen

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • bara. Crematogaster bara Blaimer, in Blaimer & Fisher, 2013: 20, fig. 7 (w.q.) MADAGASCAR.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

(n = 16) [holotype] HW 0.87-1.03 [0.96]; HL 0.78-0.95 [0.89]; EL 0.18-0.23 [0.20]; SL 0.77-0.87 [0.83]; WL 0.98-1.22 [1.07]; SPL 0.10-0.18 [0.12]; PTH 0.18-0.24 [0.20]; PTL 0.27-0.34 [0.30]; PTW 0.28- 0.36 [0.31]; PPL 0.15-0.19 [0.16]; PPW 0.28-0.35 [0.29]; LHT 0.77-0.93 [0.82]; CI 1.04-1.14 [1.08]; OI 0.21-0.25 [0.22]; SI 0.91-1.01 [0.93]; SPI 0.09-0.17 [0.12]; PTHI 0.62-0.75 [0.68]; PTWI 0.97-1.17 [1.02]; PPI 1.65-2.00 [1.86]; LBI 1.20-1.32 [1.29]. Medium to large size (HW 0.87-1.03, WL 0.98-1.22).

Masticatory margin of mandibles with four teeth; head shape quadrate, or longer than wide (CI 1.04- 1.14); posterior margin of head in full-face view laterally rounded or subangular; occipital carinae usually distinct; antennal scapes always easily surpassing head margin; midline of eyes situated at midline of head in full-face view; eyes moderately large (OI 0.21-0.25) and protruding. Pronotum laterally subangular to rounded; promesonotal suture indistinct; promesonotum more or less forming one rounded plane, mesonotum usually with a short posterior face; laterally mesonotum angular, ending in minuscule posterolateral denticles that set off the promesonotum from propodeum; metanotal groove shallow, laterally constricted; propodeal spines short, spiniform (SPI 0.09-0.17); propodeal spiracles large, situated directly at base of spines; dorsal face of propodeum convex, almost as long as posterior face; posterior face of propodeum gently sloping; petiole in dorsal view broadly oval or moderately flared, usually concave, without posterolateral tubercules or denticles; subpetiolar process usually present as angular dent; postpetiole very distinctly bilobed, with broad median impression; subpostpetiolar process absent.

Head sculpture reticulate; pronotum dorsally rugulose-reticulate; mesonotum reticulate, mesopleuron areolate, dorsal face of propodeum reticulate-carinulate; otherwise sculpture mostly reticulate; face usually with < six erect, longer setae, and regular, shorter, appressed to decumbent pubescence; erect pilosity on promesonotum usually < eight long setae; otherwise promesonotum dorsally with regular appressed pubescence; petiole and postpetiole usually with a pair of longer erect setae posterolaterally, and shorter decumbent or appressed pubescence; abdominal tergites four to seven with fairly regular, short, erect pilosity, more abundant and longer on sternites four to seven, and abundant appressed pubescence throughout. Color bright to reddish yellow.

Queen

(n = 3) HW 1.42-1.45; HL 1.32-1.37; EL 0.39-0.40; SL 1.03-1.12; MSNW 1.22-1.48; MSNL 1.37-1.44; WL 2.46-2.75; SPL 0.00; PTH 0.37-0.40; PTL 0.44-0.47; PTW 0.55-0.61; PPL 0.37-0.38; PPW 0.59- 0.61; LHT 1.22-1.25; CI 1.06-1.08; OI 0.28-0.31; SI 0.76-0.82; MSNI 0.89-1.07; SPI 0.00; PTHI 0.84- 0.87; PTWI 1.23-1.31; PPI 1.61; LBI 2.12-2.20. Medium size (HW 1.42-1.45, WL 2.46-2.75). With worker characters, except as follows. Masticatory margin of mandibles with five teeth; antennal scapes easily surpassing level of lateral ocelli; eyes fairly large (OI 0.28-0.31), situated at midline of head in full-face view; head shape more or less quadrate (CI 1.06-1.08), posterior margin straight.

Mesoscutum in dorsal view variable (MSNI 0.89-1.07); dorsal face of propodeum short; propodeal tubercules or denticles may be present; petiole moderately flared, postpetiole merely impressed posteriorly; subpetiolar process absent. Head sculpture reticulate; dorsal face of propodeum carinulate; petiole and postpetiole reticulate; otherwise sculpture reticulate throughout; face usually with < ten longer, erect setae and dense, short, erect to decumbent pubescence; mesonotum with regular, short, suberect pubescence, interspersed with longer, erect setae; petiole and postpetiole with dense, short, suberect to decumbent pilosity, and postpetiole with additional, longer dorso-posterior setae; abdominal tergites and sternites four to seven with abundant, short, erect pilosity and dense appressed to decumbent pubescence. Colored yellow as in workers; wings clear.

Type Material

Holotype. Worker: pinned, CASENT0491123, BLF07783, under stone [imaged on AntWeb]; original locality label: MADG’R: Fianarantsoa: P.N. Isalo, Ambovo Springs, 29.3 km 4° N Ranohira 990 m, 22º19.9’S, 45º21.1’E, 14 Feb. 2003, Fisher et al., BLF#; deposited at California Academy of Sciences. Paratypes. 4 workers, pinned, same collection and locality data as holotype. #1: CASENT0317776, deposited at South African Museum. #2: CASENT0317777, deposited at Musee d'Histoire Naturelle Genève. #3: CASENT0317778, deposited at Museum of Comparative Zoology. #4: CASENT0317779, deposited at University of California, Davis. MADAGASCAR: Fianarantsoa: P.N. Isalo, Ambovo Springs, 29.3 km 4° N Ranohira, -22.29833, 45.35167, 990 m, Uapaca woodland.

Etymology

Crematogaster bara is named after the Malagasy “Bara” tribe that inhabits the countryside within the distribution range of this species. The name is treated as noun in apposition.

References

  • Blaimer, B.B. & Fisher, B.L. 2013. Taxonomy of the Crematogaster degeeri-species-assemblage in the Malagasy region (Hymenoptera: Formicidae). European Journal of Taxonomy 51: 1-64 (DOI 10.5852/ejt.2013.51).

References based on Global Ant Biodiversity Informatics

  • Blaimer B. B., and B. L. Fisher. 2013. Taxonomy of the Crematogaster degeeri-species-assemblage in the Malagasy region (Hymenoptera: Formicidae). European Journal of Taxonomy 51: 1-64.