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Species: Pheidole striaticeps   Mayr, 1870 

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Taxonomic History (provided by Barry Bolton, 2023)

Pheidole striaticeps Mayr, 1870b PDF: 987 (s.w.) MEXICO. Neotropic. Primary type information: Primary type material: lectotype major worker (by designation of Wilson, 2003a: 512). Primary type locality: lectotype Mexico: (no further data) (E. Norton). Primary type depository: NHMW. Primary type specimen: CASENT0916072 (lectotype). Secondary type information: Secondary type material: 1 paralectotype minor worker. Secondary type locality: same as for lectotype. Secondary type depository: NHMW. AntCat AntWiki HOL

Taxonomic history

Lectotype designation: Wilson, 2003a: 512.
// Distribution


  Geographic regions (According to curated Geolocale/Taxon lists):
    Americas: Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, Panama
  Biogeographic regions (According to curated Bioregion/Taxon lists):

Distribution Notes:

Costa Rica, Mexico. Costa Rica: Atlantic slope to 500m and southern Pacific lowlands.


Natural History:

Occurs in mature wet forest habitats; nests under loose bark of rotten wood; forages diurnally.


The type of striaticeps is from Mexico. Our identification of this species as striaticeps rests on a MCZ collection from Monteverde, which E. O. Wilson compared with the type. We also compared Costa Rican material of this species with a MCZ syntype of chloe Forel 1908. The type locality of chloe is Costa Rica (La Caja, near San Jose), and we determine it to be conspecific with the Costa Rican material we identify as striaticeps. Thus, if the determination by Wilson is correct, chloe is a junior synonym of striaticeps. However, if striaticeps is later found to be a distinct Mexican species, chloe is a firm name for this species.

Taxonomic Treatment (provided by Plazi)

Treatment Citation: Wilson, E. O., 2003, Pheidole in the New World. A dominant, hyperdiverse ant genus., Cambridge, MA: Harvard University Press

Pheidole striaticepsHNS Mayr

Pheidole striaticepsHNS Mayr 1870b: 987.

Types Naturhist. Mus. Wien.

Etymology L striaticepsHNS, lined (striate) head.

Diagnosis A member of the flavensHNS group close to chloeHNS, less so to the other species listed in the heading, distinguished as follows. Major: antennal scrobes present; entire dorsal surface of head covered by longitudinal carinulae, which curve inwardly toward midline at occiput; humerus prominent and rounded in dorsal-oblique view; mesonotal convexity present, especially in dorsal-oblique view; head wider than long (Head Width/Head Length 1.03); pronotum transversely carinulate. Minor: carinulae absent from around thorax-propodeal suture.

Measurements (mm) Lectotype major: HW 1.06, HL 1.02, SL 0.56, EL 0.12, PW 0.50. Paralectotype minor: HW 0.62, HL 0.62, SL 0.56, EL 0.08, PW 0.42. Color Major: concolorous light reddish brown. Minor: concolorous light reddish brown.

Range Mexico (almost certainly tropical Mexico), Honduras, Costa Rica, and Amazonian Peru. Longino (1997) does not distinguish this species from chloeHNS, although the two are different. He reports " striaticepsHNS, " which may include both species, from the Atlantic slope to 500 m and Pacific lowlands of Costa Rica.

Biology Longino (1997) reports " striaticepsHNS, " which may include both true striaticepsHNS and chloeHNS, from mature rainforest, nesting under the bark of rotting stumps and logs. At Cuzco Amazonico, near Puerto Maldonado, Stefan Cover and John E. Tobin found a colony in a gap within mature rainforest, beneath the bark of a rotten but still hard log.

Figure Upper: lectotype, major. Lower: paralectotype, minor. MEXICO. Scale bars = 1 mm.

Specimen Habitat Summary

Found most commonly in these habitats: 8 times found in cloud forest, 3 times found in rainforest, 3 times found in montane wet forest, 2 times found in mature wet forest, 3 times found in coffee farm, 3 times found in tropical moist forest, 1 times found in riparian forest, 1 times found in tropical rainforest, some big trees, 1 times found in wet forest, 1 times found in riparian forest in steep ravine, ...

Found most commonly in these microhabitats: 11 times at bait, 4 times ex sifted leaf litter, 1 times in rotten log with loose bark, 3 times nest in dead wood, 1 times house pest, 1 times ex rotten log (rot-hole in old treefall), 1 times at baits, 1 times nest under loose bark rotten wood, 1 times forager, 2 times ex rotten log, 1 times column on dead wood., ...

Collected most commonly using these methods: 11 times search, 7 times Baiting, 4 times bait, 1 times Winkler, 2 times Malaise, 2 times miniWinkler, 1 times Beating, 1 times Berlese, 1 times MaxiWinkler.

Elevations: collected from 10 - 1580 meters, 898 meters average

Collect Date Range: collected between 1982-05-09 00:00:00.0 and 2022-01-18 00:00:00.0

Type specimens: Lectotype of Pheidole striaticeps: casent0916072; Not Provided: casent0283260; paralectotype of Pheidole striaticeps: casent0919787; syntype of Pheidole goeldii chloe: casent0904420, casent0904421; Syntype Pheidole chloe: jtlc000014074, jtlc000014075

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