unassigned

Stenamma schmidti Menozzi

Genus Species: 
Stenamma schmidti
Occurrence
Range: 

COSTA RICA

Region: 
Neotropical

Stenamma manni W.M. Wheeler

Genus Species: 
Stenamma manni
Occurrence
Range: 

MEXICO.

Region: 
Neotropical

Stenamma felixi Mann

Genus Species: 
Stenamma felixi
Occurrence
Range: 

Type from Honduras

Region: 
Neotropical

Stenamma expolitum Smith M.R.

Genus Species: 
Stenamma expolitum
Occurrence
Range: 

COSTA RICA

Region: 
Neotropical

Stenamma diversum Mann

Genus Species: 
Stenamma diversum
Occurrence
Range: 

Type from Honduras.

Region: 
Neotropical

Stenamma alas Longino

Genus Species: 
Stenamma alas
Occurrence
Range: 

Type from Costa Rica.

Region: 
Neotropical

Stenamma meridionale M.R. Smith

Genus Species: 
Stenamma meridionale
Biology
Biology Introduction: 

From Smith 1957: The only collections of meridionale made directly from colonies were those of Mary Talbot in the Droste Woods in St. Charles County, Missouri. She described the woods as a small, mixed oak-hickory woods, with large red and white oaks predominating. There was a great variety of other trees such as linden, elm, sycamore, maple, and sassafras. The collections were made in a pawpaw thicket occupying a gentle slope from a ridge to a small stream in the center of the woods. The trees overhead allowed moving patches of sunlight but did not form the continuous deep shade of beech-maple woods. There were scattered shrubs of buck brush, elderberry, sumach, etc., with the herb layers consisting of spring blooming flowers such as spring beauty, mandrake, dentura, and red trillium. The ground cover had a fairly heavy leaf covering mixed with a litter of twigs, acorns, hickory nuts and decaying branches. The soil was very dark and loose for three or four inches, then it became progressively compact and light colored until below six or seven inches it was a very hard-packed clay. Colony 48-2 was collected-November 10, 1948, from two chambers in which the ants were hibernating" in hard clay in depths of 10 and 15 inches. This colony was found when the air temperature was 43° F "and the soil temperature 52° F. In the 10 inch chamber both workers and larvae were found, in the 15-inch chamber only a few workers. Although the ground was dug to a depth of 21 inches, no other immature stages or adults were found. The total content of the nest was 19 workers and 36 medium to large larvae, but no pupae, females, "or males. This may not have represented the entire colony. The second colony, 52-12, was found October 6, 1952, in a chamber 13 inches deep which looked like a horizontal crack in the dry, hard clay. There had been no cold weather and the ants were still foraging in the woods. The air temperature at this time was 73° F, and the soil temperature 58° F. From the chamber were taken 11 workers and one deal ate female, four have but no eggs, pupae, winged females or males.
In localities in other states where collections were usually made with Berlese funnel, single collections usually produced only from 1-13 workers with occasionally a dealate female. These individuals were largely taken from leaf mould, ground cover or top soil, mostly, if not entirely, in the woods. At this time- we do not know the maximum size of colonies, the diversity of the nesting habits nor the month or months of the year in which males and winged females are produced.

Talbot (1957) added some additional published information to that she supplied to Smith. This information was part of a study where she excavated soil during the cooler months of the year, in a Missouri woodland, on order to survey ant nests. "Stenamma meridionale was found only once on the plots and once previously. The two colonies overwintered larvae, as did the other Stenamma. One occupied a chamber thirteen inches deep, and one had two chambers, ten and fifteen inches deep, in the hard, yellow clay. The colonies collected were small, being made up of sixteen and 55 individuals of which eleven and nineteen were workers."

Identity
Identification: 

Stenamma meridionale workers can be distinguished by the following characters: Large size, 3.4-4 mm; large eyes, which have 8-10 ommatidia in their greatest diameter; pronounced mesoepinotal constriction, which is often as much as 0.15 mm in its greatest length and from 0.05 to almost 0.10 mm in depth; the posteriorly sloping base of the epinotum; the long, finger-like epinotal spines; and the anteroposteriorly compressed petiolar node, which when viewed from above and behind is subrectangular and has a straight or weakly emarginate superior border.

Smith 1957

Etymology Text: 

Presumably Smith felt this species was relatively restricted in its latitudinal range, meridional L. = southern

Occurrence
Range: 

Virginia, Missouri, and Illinois south to South Carolina and Arkansas. The most northern locality from which this species has been collected is Oakwood, Vermilion County, Illinois, which is slightly above the 40th degree of latitude.

Smith 1957

Region: 
Nearctic
Type Information
Type Information: 

Described from individuals collected from two colonies by Mary Talbot. The holotype and 15 paratype workers from colony No. 48-2 collected 11-10-48 and a wingless female and 11 paratype workers from colony No. 52-12 collected 10-6-52. All of these have been placed in the U. S. National Museum under U.S.N.M. No. 62392.

Smith 1957

Type Locality: 

Droste Woods, St. Charles County, Missouri.

Smith 1957

Stenamma impar Forel

Genus Species: 
Stenamma impar
Biology
Biology Introduction: 

Smith (1957) reports: In her population studies of soil nesting ants in the Droste Woods, St.Charles County, Missouri, from September to March during the years 1948 to 1953, Miss Mary Talbot found impar to be the most common Stenamma, schmitti; second, and meridionale third. It is surprising that no individuals of brevicorne were taken. She is positive that in many instances she did not collect entire colonies of impar. Colonies or portions of colonies were collected at depths from 4 to 16 inches. Usually only one chamber was found, occasionally there were two. The largest number of workers collected from a colony was 109, the least 5. Only ,one mother queen was found per colony in 4 colonies. It appears from these and other records that most if not all colonies have only a single mother queen. Miss Talbot found that it is common for the larvae to overwinter in the nest; however, a half dozen or less eggs were found in 2 colonies as late as the middle of October. At the time of collection colonies were taken from both dry and damp soils. In the Edwin S. George Reserve in Livingston County, Michigan, Miss Talbot collected winged females and males from a colony on August 13, 1949. In the same locality K. Bohnsack collected 33 workers, 3 alate females and 1male from a colony on August 19, 1949. Although Miss Talbot commonly found the species nesting in the soil, one of our records may indicate that impar also nests in rotten or faulty wood. This species has been collected at altitudes up to 4760 feet.

Talbot (1957) adds her own published account of nests found by excavating soil during the cooler months of the year in a Missouri woodland: Workers were easy to see, for although they were small they were bright colored, were clustered in well defined chambers in firm clay soil and moved slowly when disturbed. Eight collections of complete colonies averaged 108 individuals, of which half were workers. Larvae were overwintered, and a few eggs were still present in November. Chambers were fairly deep in the soil: one was four inches below the surface, but the others ranged from seven to sixteen inches with a mean depth of 10.1 inches. A typical chamber was 1/2 inch long, 3/8 inch wide, and 1/4 inch high, dome-shaped and very smooth. Usually a colony occupied only one chamber.

Identity
Identification: 

Smith 1957: The worker of Stenamma impar can in general be distinguished by its small size,slender form, fineness of body sculpturing, and usually light brown or yellowish brown color. Other important characters are: The rather small, coarsely facetted eye which measures approximately 0.10 mm in its greatest diameter and contains 5-6 ommatidia; funicular segments 2 through 7 broader than long; distinct to very pronounced mesoepinotal impression; the distinct but short, tuberculate spines which are angularly borne on the epinotum; the very strikingly angular petiolar node (in profile); and the weakly developed longitudinal rugulae at the base of the gaster.

Smith cautions that worker size and color can be quite variable.

Etymology Text: 

impar L. = unequal. Forel was perhaps referring to the short and uneven spines found on the propodeum.

Occurrence
Range: 

Massachusetts to Georgia, west to North Dakota, Illinois, and Missouri.

Smith 1957

Region: 
Nearctic
Type Information
Type Information: 

Described from workers collected by A. Forel and Theodore Pergande on the Virginia bank of the Potomac River near Washington, D. C., while sifting damp leaves; also from a dealate female unassociated with other castes collected by Forel in Franklin Park, Boston, Massachusetts. I hereby designate Virginia as the type locality and have selected as a lectotype, a cotype worker from the Museum d'Histoire Naturelle Geneva, Switzerland.

Types located: Museum d'Histoire Naturelle, Geneva, Switzerland American Museum of Natural History, U. S. National Museum. 

Smith 1957

Lectotype: MHNG; Paratypes: MHNG: AMNH, USNM.

Type Locality: 

Virginia, by designation.

Smith 1957

Stenamma foveolocephalum M. R. Smith

Genus Species: 
Stenamma foveolocephalum
Biology
Biology Introduction: 

The type specimens and types of the synonym Stenamma carolinense were found in sparsely vegetated sandy soil. Nests found in Florida were in similar situations and had nest entrance holes that resembled fire ant foraging entrances. A small pile of sand granules were arranged discontinuously in a roughly circle shape around the entrance hole. Nests appeared to consist of small chambers located within 15 cm of the ground surface. Across their range specimens have been collected in sand scrub, open areas in pine scrub, power line cuts and along roadside berms. This species is suspected of foraging above ground in the winter months. It has been found in a number of southern states but in just a few localities.

DuBios and Davis speculated this species prefers disturbed habitat due to its openness. Such sites  may aid the winter foraging habitats of Stenamma foveolocephalum by allowing more direct heating of the ground surface.

Smith 1930, DuBois and Davis 1998

Identity
Identification: 

From Stenamma brevicorne and its various forms Stenamma foveolocephalum differ in the following particulars: (1) larger eyes (which have 6-7 large ommatidia in their greatest diameter); (2) the reticulate-foveolate sculpturing of the head; (3) the transverse rugulae on the basal surface of the epinotum;, (4) the longer and somewhat subcampanulate shaped postpetiole; (5) the deeper body coloration; and (6) by the more highly glabrous surface of the head and thorax. 

Smith 1930

Etymology Text: 

Presumed to be a reference to the reticulate-foveolate sculpturing of the head.

Occurrence
Range: 

USA. Known from Mississippi, Alabama, Florida and North Carolina.

Region: 
Nearctic
Type Information
Type Information: 

One cotype worker in the U. S. National Museum which I hereby designate as the lectotype. A second cotype worker in the collection of the Department ofEntomology of the Mississippi State College has apparently been lost.

Smith 1957

Type Locality: 

Two miles south of Ackerman,Mississippi.

Smith 1957

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