Uploaded 2009; last updated 24 August 2016
Paratrechina longicornis, full face view of a worker(MS, Hancock Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, lateral view of a worker(MS, Hancock Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, dorsal view of a worker(MS, Hancock Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, full face view of a queen (FL, Seminole Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, lateral view of a queen (FL, Seminole Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, dorsal view of a queen (FL, Seminole Co.) (photo by Joe A. MacGown)
Paratrechina longicornis, lateral view of a worker(MS, Jackson Co.) (photo by Joe A. MacGown)
Paratrechina species can be identified by having a waist with one distinct segment; acidopore at the apex of the gaster with a circular fringe of setae; 12-segmented antennae; triangular mandibles with five teeth; six-segmented maxillary palps; head and body with dorsally erect, coarse setae; very long scape and legs; and weakly shinning with scarce pubescence.
Paratrechina longicornis is the most widespread Paratrechina species is most often found in disturbed habitats and has a pantropical distribution. This species can be a common house pest foraging inside for any scraps of food lying around and has been able to spread to less tropical environments because of its close association with humans and heated buildings.
Taxonomic History (Bolton 2016)
Queen: HL 1.06, HW 1.03, SL 1.40, EL 0.39, MeSL 1.92 (n=1) (MEM specimen). Color brown to dark brown with lighter specimens often with a yellowish mesonotum. Coxae, trochanter and base of femur pale yellow. Head covered in short, appressed, hair-like setae; eyes about 1/3 the length of the head and positioned posterior to the midline of the head; three ocelli present; mandibles more or less triangular is shape with five distinct teeth; maxillary palps long and six-segmented; antennae 12-segmented with elongate scape; scape not as long in comparison to the head as in workers. Mesosoma covered with a light pubescence; enlarged with four wings or wing scars present. Waist single segmented; petiolar node short in comparison to the gaster and often obscured by the anterior edge of the gaster in the dorsal view. Gaster covered in dense pubescence; lacking sting; acidopore present at apex.
Male: ( no specimens in MEM; description based on antwiki.org pictures).
Biology and Economic Importance
Paratrechina longicornis is considered to be a nuisance pest species due to its tendency to forage and nest in homes and buildings and the ease of which humans move it around. Colonies tend to be found in buildings, or nearby to building, more frequently than in natural undisturbed areas in the Southeastern United States. It is believed to have first entered the United States through Florida and has now spread across the Gulf Coast and Southern East Coast states. P. longicornis has a great sense of smell and will quickly find any food in the area and will readily feed on common household foods including meat, sweats, vegetables and fountain soda syrups.
Australian: Australia, Barrow Island, Cook Islands, Fiji, French Polynesia, Guam, Hawaii, Indonesia, Kiribati, Marshall Islands, Micronesia, New Caledonia, New Guinea, New Zealand, Niue, Norfolk Island, Northern Mariana Islands, Palau, Samoa, Solomon Islands, Timor-Leste, Tokelau, Tonga, Tuvalu, Vanuatu (AntWeb.org).
U.S. Distribution: AL, AZ, CA, FL, GA, HI, LA, MS, NC, SC, TX (AntWeb.org and MEM).
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