Taxonomic History (provided by Barry Bolton, 2021)
Proceratium californicum Cook, 1953 PDF
: 45, fig. (m.) U.S.A. (California). Nearctic. Primary type information: Type-material: holotype male. Type-locality: U.S.A: California, Santa Cruz Mts, Glenwood, 27.v.1908. Type-depository: LACM. Type notes: Snelling, 1967 PDF
: 2, stated that the holotype is “the property of the Snow Museum, Oakland, California” (now the Oakland Museum of California); but Ward, 1988 PDF
: 112, records its presence in LACM. AntCat AntWiki HOL
Status as species: Brown, 1958g PDF
: 247, 332; Smith, 1958c PDF
: 111; Snelling, 1967 PDF
: 2 (redescription); Smith, 1979
: 1338; Brown, 1980c PDF
: 343 (in key); Ward, 1988 PDF
: 109; Bolton, 1995b
: 366; Baroni Urbani & de Andrade, 2003a PDF
: 243 (redescription); Ward, 2005 PDF
Distribution: Geographic regions
(According to curated Geolocale/Taxon lists): Americas: United States Biogeographic regions
(According to curated Bioregion/Taxon lists): Nearctic
Central and southern California. Endemic.
This rarely collected ant is known from valley oak (Quercus lobata) riparian woodland in the Central Valley and from adjacent foothill localities (oak woodland; chaparral; grassland). It is presumed to be a specialist, subterranean predator on spider eggs. Alates have been collected in April and May.
Worker: standing pilosity lacking on scape and legs; scape relatively long (SL/HL 0.76-0.80); eye vestigial, reduced to a fleck of dark pigment (no distinct ommatidium); petiole low and broad, with anterior and posterior faces converging on a rounded summit; length of abdominal sternite 4 (excluding the presternite) about 0.4 times that of the corresponding tergite.
Snelling (1967); Ward (1988).
Taxonomic Treatment (provided by Plazi)
Specimen Habitat Summary
Found most commonly in these habitats: 3 times found in oak woodland, 3 times found in riparian woodland, 1 times found in in soil, 1 times found in oak savanna, 1 times found in open grassland, 1 times found in serpentine grassland.
Found most commonly in these microhabitats: 2 times sifted litter, 1 times sifted litter (leaf mold, rottenn wood), 1 times on moist sawdust pile, 1 times worker under stone, 1 times under stone, 1 times under log, 1 times under large rock.
Collected most commonly using these methods: 2 times search, 1 times hand collecting, 1 times midden.
Elevations: collected from 15 - 1050 meters, 438 meters average
Collect Date Range: collected between 1986-04-04 and 2019-04-27
See something amiss? Send us an email.