Pheidole grallatrix Emery, 1899

Salata, Sebastian & Fisher, Brian L., 2020, The ant genus Pheidole Westwood, 1839 (Hymenoptera: Formicidae) in Madagascar-taxonomic revision of the bessonii species-group, Zootaxa 4843 (1), pp. 1-64: 33-36

publication ID

https://doi.org/10.11646/zootaxa.4843.1.1

publication LSID

lsid:zoobank.org:pub:57044928-1950-4525-850E-E381A52599A1

DOI

http://doi.org/10.5281/zenodo.4488391

persistent identifier

http://treatment.plazi.org/id/03938025-FFAE-A935-A7D8-B69FFC69FE99

treatment provided by

Plazi

scientific name

Pheidole grallatrix Emery, 1899
status

 

Pheidole grallatrix Emery, 1899  

Figs 16 View FIGURE 16 A–F, 27H, 28H

Pheidole grallatrix Emery, 1899: 278   (s.w.)

LECTOTYPE [designated here]: 1s., Madagascar, Toamasina, Baie d’Antongil, coll. Mocquerys, CASENT0904224, ANTC24064 ( MSNG)   . PARALECTOTYPES: 2w., the same data as lectotype, CASENT0904225, ANTC24065 ( MSNG), CASENT0101943 View Materials , ANTC3397 View Materials ( MHNG)   .

Other material. Madagascar. Antsiranana: 3w., 6.5 km SSW Befingotra, Rés. Anjanaharibe-Sud , -14.75 49.5, 875 m, B. L. Fisher et al. leg. ( CASC)   ; 1w., Forêt de Binara , 7.5 km 230° SW Daraina, -13.255 49.61667, 375 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Makirovana forest , -14.17066 49.95409, 415 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 4w., 1s., Masoala National Park , -15.32331 50.30751, 60 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., 1s., Parc National de Marojejy, Manantenina River , 27.6 km 35° NE Andapa, 9.6 km 327° NNW Manantenina, -14.435 49.76, 775 m, B. L. Fisher et al. leg. ( CASC)   ; 1w., 3s., Parc National de Marojejy, Manantenina River, 28.0 km 38° NE Andapa , 8.2 km 333° NNW Manantenina, -14.43667 49.775, 450 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., RNI Marojejy , 8 km NW Manantenina, -14.43333 49.78333, 450 m, E.L. Quinter leg. ( CASC) GoogleMaps   ; 4w., SAVA Region, District of Sambava, Marojejy National Park , 5 km W of Manantenina village, 1st Camp site ( Mantella ), -14.43817 49.774, 487 m, M. Rin’Ha leg. ( CASC) GoogleMaps   ; 4w., 1s., Sava Region: Parc National de Marojejy, near Manantenina River , -14.43677 49.77541, 475 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   . Fianarantsoa: 5w., 1s., 7.6 km 122º Kianjavato, Forêt Classée Vatovavy , -21.4 47.94, 175 m, B. L. Fisher et al. leg. ( CASC)   ; 2s., Forêt d’Ambalagoavy Nord, Ikongo, Ambatombe , -21.857068 47.37849, 625 m, Harin’Hala & Irwin leg. ( CASC) GoogleMaps   ; 2w., JIRAMA water works near river, Ranomafana National Park   , Fianarantsoa Prov., -21.2485 47.45217, 690 m, Irwin et al. leg. ( CASC) GoogleMaps   ; 1w., radio tower, Ranomafana National Park   , Fianarantsoa Prov., -21.25833 47.40717, 1130 m, Irwin et al. leg. ( CASC) GoogleMaps   ; 1s., Ranomafana , -21.25 47.36667, A. Pauly leg. ( CASC)   ; 1w., Réserve Speciale Manombo 24.5 km 228° Farafangana , -23.01583 47.719, 30 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   . Toamasina: 1w., 5.3 km SSE Ambanizana, Andranobe , -15.67133 49.97395, 425 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 2w., 6.3 km S Ambanizana, Andranobe , -15.6813 49.958, 25 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Bevolota 17.1 km N Andasibe, -18.77071 48.43164, 995 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 2w., F.C. Sandranantitra , -18.04833 49.09167, 450 m, H. J. Ratsirarson leg. ( CASC) GoogleMaps   ; 5w., 4s., Forêt d’Analava Mandrisy, 5.9 km 195º Antanambe , -16.48567 49.847, 10 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 7w., 5s., Ile Sainte Marie, Forêt Kalalao, 9.9 km 34° Ambodifotatra , -16.9225 49.88733, 100 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 2s., Manakambahiny, near Vavatenina Forest , -17.46667 49.35, A. Pauly leg. ( CASC)   ; 3w., Montagne d’Akirindro 7.6 km 341° NNW Ambinanitelo, -15.28833 49.54833, 600 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 7w., 4s., 1q., Montagne d’Anjanaharibe, 18.0 km 21° NNE Ambinanitelo , -15.18833 49.615, 470 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Montagne d’Anjanaharibe , 19.5 km 27° NNE Ambinanitelo, -15.17833 49.635, 1100 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1s., Nosy Mangabe , 7.43 km S Maroantsetra, -15.4973 49.76223, 3 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., 1s., Parc National de Zahamena, Besaky River , -17.75244 48.85321, 760 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 6w., 3s., Parc National Mananara-Nord, 7.1 km 261° Antanambe , -16.455 49.7875, 225 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 5w., Parcelle E3 Tampolo , -17.28104 49.43012, 10 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 2w., Parcelle K7 Tampolo , -17.28333 49.41667, 10 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 6w., 3s., Parcelle K 9 Tampolo , -17.175 49.268, 10 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 4w., 1s., Res. Ambodiriana, 4.8 km 306° Manompana, along Manompana river , - 16.67233 49.70117, 125 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Reserve Betampona, Camp Rendrirendry 34.1 km 332° Toamasina , -17.924 49.19967, 390 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Réserve Spéciale Ambatovaky, Sandrangato river , -16.7633 49.26692, 520 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 4w., Réserve Spéciale Ambatovaky, Sandrangato river , -16.81739 49.29402, 360 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 3w., 6s., 2m.   , S.F. Tampolo, 10 km NNE Fenoarivo Atn. , -17.2825 49.43, 10 m, B. L. Fisher et al. leg. ( CASC); 5w., 5s., Sahafina forest 11.4 km W Brickaville, -18.81445 48.96205, 140 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., 1s., Tampolo , -17.28333 49.41667, 10 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Torotorofotsy , -18.77048 48.43043, 1005 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   . Toliara: 6w., Anosy Region, Anosyenne Mts , 29.33 km NW Manantenina, -24.13993 47.07418, 540 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   ; 1w., Parc National Andohahela, Col de Tanatana , 33.3 km NW Tolagnaro, -24.7585 46.85367, 275 m, B. L. Fisher et al. leg. ( CASC) GoogleMaps   .

Geographic range. Madagascar, widely distributed across rainforest on the eastern part of the island.

Diagnosis. Major workers. Head in full-face view sub-rectangular, not widening posteriorly, with lateral margins slightly convex; side of head with moderately sparse, short, appressed to subdecumbent pilosity; frons with thin and sparse costulae that sometimes arch posterolaterally on the posterior part; interspaces between costulae smooth to indistinctly punctate; occipital lobes sometimes partially smooth, with thin rugopuncta that weaken posteriorly and arch posterolaterally; scape, when laid back, exceeding the midlength of head by two-fifths of its length; inner hypostomal tooth indistinct, low and bulge-like; outer hypostomal tooth lobe-like, higher than inner tooth, top directed posteriorly; inner and outer hypostomal tooth closely spaced and not connected by concavity; promesonotum short, angular and low; posterior mesonotum smoothly declining towards propodeum; mesonotal process distinct and tubercle-like; mesosoma smooth, only posterolateral sides of pronotum, katepisternum, and propodeum sometimes with sparse and thick rugulae; gaster smooth; body reddish brown to brown. Minor workers. Occiput elongated into a long, narrow neck terminating in a distinct nuchal collar; head sculpture smooth; scape, when laid back, exceeding the posterior head margin by half of its length; promesonotum very low, long, and slightly arched; promesonotal groove present; metanotal groove distinct; propodeal spines long and thin; mesosoma smooth; body brown to dark brown.

Description. Major workers. Measurements (n=10): HL: 2.04–2.36 (2.26); HW: 1.87–2.21 (2.09); SL: 1.55– 1.68 (1.63); EL: 0.25–0.28 (0.26); WL: 1.84–2.19 (2.08); PSL: 0.39–0.48 (0.44); MTL: 1.8–2.03 (1.92); PNW: 0.69–0.83 (0.76); PTW: 0.21–0.24 (0.23); PPW: 0.49–0.58 (0.53); CI: 104.1–110.5 (107.8); SI: 73.8–83.6 (77.8); PSLI: 17.8–20.9 (19.6); PPI: 39.4–46.2 (42.8); PNI: 34.9–38.4 (36.1); MTI: 87.9–96.3 (91.5).

Head. In full-face view sub-rectangular, not widening posteriorly with lateral sides slightly convex ( Fig. 16B View FIGURE 16 ). In lateral view sub-oval, not depressed posteriorly; ventral and dorsal margins convex; inner hypostomal tooth visible. Side of head with moderately sparse, short, appressed to subdecumbent pilosity; head dorsum with relatively dense, long, decumbent to erect pilosity. Frons with thin and sparse costulae that sometimes arch posterolaterally on the posterior part; interspaces between costulae smooth to indistinctly punctate. Occipital lobes sometimes partially smooth; with thin rugopuncta that weaken posteriorly arch posterolaterally. Gena with dense and thick costulae; interspaces between costulae distinctly punctate. Sides posterolateral from eyes with dense and thin microreticulae that weaken posteriorly. Center of clypeus shiny and indistinctly punctate, lateral sides with weakly developed rugulae; median notch present, moderately wide and shallow; median longitudinal carina present; lateral longitudinal carinae present. Scape, when laid back, exceeding the midlength of head by two-fifths of its length; pilosity subdecumbent to erect ( Fig. 16B, D View FIGURE 16 ). Inner hypostomal tooth indistinct, low and bulge-like; outer hypostomal tooth lobe-like, higher than inner tooth, top directed posteriorly; inner and outer hypostomal tooth closely spaced and not connected by concavity ( Fig. 27H View FIGURE 27 ). Mesosoma. In lateral view, promesonotum short, angular and low; posterior mesonotum smoothly declining towards propodeum; mesonotal process distinct and tubercle-like; promesonotal groove absent; metanotal groove absent; propodeal spines long, narrow and with acute top; humeral tubercle weakly produced ( Fig. 16D View FIGURE 16 ). Surface shiny and smooth; posterolateral sides of pronotum, katepisternum, and propodeum sometimes with sparse and thick rugulae. Pilosity moderately dense, short, and erect ( Fig. 16D, F View FIGURE 16 ). Petiole. Smooth; in rear view node dorsoventrally convex medially ( Fig. 16D, F View FIGURE 16 ). Postpetiole. Shagreened; dorsum with slightly sparser sculpture ( Fig. 16D, F View FIGURE 16 ). Gaster. Shiny and smooth; pilosity moderately sparse, moderately long, and erect ( Fig. 16D, F View FIGURE 16 ). Color. Reddish brown to brown, antennae and legs yellowish brown ( Fig. 16D, F View FIGURE 16 ).

Description. Minor workers. Measurements (n=10): HL: 0.99–1.22 (1.04); HW: 0.58–0.77 (0.62); SL: 1.51– 1.9 (1.6); EL: 0.16–0.19 (0.17); WL: 1.27–1.58 (1.38); PSL: 0.22–0.29 (0.25); MTL: 1.4–1.77 (1.51); PNW: 0.42– 0.55 (0.46); PTW: 0.08–0.11 (0.1); PPW: 0.14–0.2 (0.16); CI: 159.4–175.0 (167.8); SI: 246.5–269.5 (258.3); PSLI: 21.8–25.0 (23.8); PPI: 51.6–79.4 (63.5); PNI: 71.0–77.1 (74.4); MTI: 230.6–258.9 (243.3).

Head. In full-face view oval, posterior region elongated into long, narrow neck terminated by distinct nuchal collar ( Fig. 16A View FIGURE 16 ). Pilosity relatively sparse, moderately long, subdecumbent to erect. Sculpture shiny and smooth; antennal sockets with few indistinct and curved posterolaterally rugulate; interspaces between rugulae smooth. Clypeus with median longitudinal carina absent; two lateral longitudinal carinae absent. Scape, when laid back, exceeding the posterior head margin, neck not included, by half of its length; pilosity dense, subdecumbent to erect ( Fig. 16A, C View FIGURE 16 ). Mesosoma. In lateral view, promesonotum very low, long, and slightly arched; promesonotal groove present; metanotal groove distinct; propodeal spines long, thin, and triangular ( Fig. 16C View FIGURE 16 ). Sculpture smooth. Pilosity very sparse, short, and erect ( Fig. 16C, E View FIGURE 16 ). Petiole. Peduncle with ventral face straight ( Fig. 16C, E View FIGURE 16 ). Gaster. With sparse and erect pilosity ( Fig. 16C, E View FIGURE 16 ). Color. Brown to dark brown, legs and antennae brighter ( Fig. 16C, E View FIGURE 16 ).

Biology. The species was collected between 3–1130 m elevation, in rainforest, littoral forest, montane rainforest, low elevation rainforest, an open area near a stream, tropical dry forest, mixed tropical forest, and on a sandy beach. Nests were located in rotten logs, soil, root mats, and under stones. Workers were collected from sifted litter and tree trunks.

Comments. Majors of P. grallatrix   are most similar to P. bessonii   , P. atsirakambiaty   , and P. voreios   and can be easily separated based on smooth mesosoma in which the posterolateral sides of pronotum, katepisternum, and propodeum may be sparsely rugulate. In contrast, P. bessonii   , P. atsirakambiaty   , and P. voreios   have entirely sculptured mesosoma. Minors of P. grallatrix   are most similar to P. zirafy   and can be separated based on smooth mesosoma. In contrast, P. zirafy   has dense and thin rugoreticulae on lateral sides of propodeum, anepisternum, and katepisternum. Distribution of P. grallatrix   overlaps only with P. zirafy   and P. voreios   .

MSNG

Museo Civico di Storia Naturale di Genova 'Giacomo Doria'

MHNG

Museum d'Histoire Naturelle

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hymenoptera

Family

Formicidae

Genus

Pheidole

Loc

Pheidole grallatrix Emery, 1899

Salata, Sebastian & Fisher, Brian L. 2020
2020
Loc

Pheidole grallatrix

Emery 1899: 278
1899