Proceratium croceum

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Proceratium croceum
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Proceratiinae
Tribe: Proceratiini
Genus: Proceratium
Species: P. croceum
Binomial name
Proceratium croceum
(Roger, 1860)

Proceratium croceum casent0104442 profile 1.jpg

Proceratium croceum casent0104442 dorsal 1.jpg

Specimen labels

This is one of the more commonly collected species in the genus. They live in rotten logs and stumps in shady areas. Colonies are sometimes found beneath the bark of decaying pine logs. Cole (1940) found a colony of about 30 workers in a small nest in firm wood near the middle of a rotten log; he points out how easy it would be to miss the nests of this species unless one carefully dissects entire logs. Van Pelt (1958) found several nests in rotten pine logs. Haskins (1930) fed a captive colony on larvae and pupae of other ants, but the Proceratium larvae died before becoming full grown. It is probable, considering the diet of other species (Brown I958a, 1980), that the normal diet is arthropod eggs.


Identification

Proceratium croceum is the largest species of the silaceum clade known from the United States. Resembling Proceratium silaceum but differing from it in the worker, gyne and male by the thicker petiole, by stronger sculpture and by the larger size: worker TL > 3.7 mm, gyne TL > 5.1 mm, male TL > 4.0 mm instead of worker TL < 3.5 mm, gyne TL < 4.1 mm, male TL < 3.3 mm. (Baroni Urbani and de Andrade 2003)

Workers and queens have a high, angulate petiole (in lateral view), distinguishing them from Proceratium pergandei, Proceratium creek and Proceratium chickasaw. The length of the worker is greater (about 3mm) than that of Proceratium silaceum (seldom more than 2.5 mm), and the mesosoma of the worker has (in lateral view) a slight concavity where the mesonotum is joined to the metanotum, this area is flat in P. silaceum.

Keys including this Species

Distribution

United States: Illinois, Oklahoma, Arkansas, Tennessee, Mississippi, Alabama, Louisiana, Virginia, North Carolina, South Carolina, Texas, Georgia, Florida. Other state records from the literature but not verified by ourselves are not included. Most of them, however, appear perfectly plausible. (Baroni Urbani and de Andrade 2003)

In Florida P. croceum is known from a small number of sites in the northern quarter of the state, south into Levy County.

Latitudinal Distribution Pattern

Latitudinal Range: 40.3° to 27.19°.

   
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Nearctic Region: United States (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Countries Occupied

Number of countries occupied by this species based on AntWiki Regional Taxon Lists. In general, fewer countries occupied indicates a narrower range, while more countries indicates a more widespread species.
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Estimated Abundance

Relative abundance based on number of AntMaps records per species (this species within the purple bar). Fewer records (to the left) indicates a less abundant/encountered species while more records (to the right) indicates more abundant/encountered species.
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Biology

Castes

Queen

Images from AntWeb

Proceratium croceum casent0104440 head 1.jpgProceratium croceum casent0104440 profile 1.jpgProceratium croceum casent0104440 dorsal 1.jpgProceratium croceum casent0104440 label 1.jpg
Queen (alate/dealate). Specimen code casent0104440. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Male

Images from AntWeb

Proceratium croceum casent0104441 head 1.jpgProceratium croceum casent0104441 profile 1.jpgProceratium croceum casent0104441 profile 2.jpgProceratium croceum casent0104441 dorsal 1.jpgProceratium croceum casent0104441 label 1.jpg
Male (alate). Specimen code casent0104441. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by ABS, Lake Placid, FL, USA.

Nomenclature

The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.

  • croceum. Ponera crocea Roger, 1860: 288 (q.) U.S.A. (Carolina).
    • Type-material: holotype queen.
    • Type-locality: U.S.A.: Carolina (no collector’s name).
    • Type-depository: MNHU.
    • Emery, 1895c: 265 (w.); Smith, M.R. 1930b: 390 (m.); Wheeler, G.C. & Wheeler, J. 1952a: 135 (l.).
    • Combination in Sysphingta: Mayr, 1866a: 501;
    • combination in Proceratium: Mayr, 1886d: 437.
    • Status as species: Mayr, 1863: 448; Mayr, 1866a: 501; Mayr, 1886d: 437; Cresson, 1887: 258; Dalla Torre, 1893: 18; Emery, 1895c: 264, Wheeler, W.M. 1908e: 401; Wheeler, W.M. 1910g: 561; Emery, 1911d: 50; Smith, M.R. 1928b: 244; Smith, M.R. 1930b: 390; Smith, M.R. 1944d: 14; Creighton, 1950a: 39; Smith, M.R. 1951a: 784; Brown, 1958g: 247; Smith, M.R. 1958c: 111; Carter, 1962a: 6 (in list); Smith, M.R. 1967: 347; Snelling, R.R. 1967: 9 (in key); Smith, D.R. 1979: 1338; Brown, 1980b: 343 (in key); Ward, 1988: 116 (in key); Deyrup, et al. 1989: 93; Bolton, 1995b: 366; Deyrup, 2003: 46; Baroni Urbani & De Andrade, 2003b: 397 (redescription); Coovert, 2005: 25; MacGown & Forster, 2005: 68; Deyrup, 2017: 18.
    • Distribution: U.S.A.

Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.

Description

Worker

Baroni Urbani and de Andrade (2003) - Head slightly longer than broad or almost as long as broad and with subparallel sides. Vertex in full face view weakly convex. Clypeus reduced and as long as the antennal sockets. Anterior border of the clypeus truncate. Frontal carinae far from each other, slightly covering the antennal insertions. Lateral expansions of the frontal carinae broad, weakly raised, diverging on the two anterior fourths, converging on the third fourth, subparallel and carinate only on the last fourth. Frontal area gently concave on the anterior three fourths and with a median, longitudinal carina and prolonging posteriorly. Head anterolaterally with a longitudinal carina. Genal carinae marked, each carina corresponding to the external border of a deep sulcus. Eyes represented by a dark dot below the integument, small and placed on the middle of the head sides. First funicular joint slightly longer than broad. Funicular joints 2-10 broader than long. Last funicular joint as long as the sum of joints 8- 10, or slightly shorter than the sum of joints 7-10, or as long as their sum. Scapes short of the vertexal margin and gently broadened apically. Masticatory margin of the mandibles with 11-13 denticles before the pointed apical tooth. Palp formula 2,2.

Mesosoma in side view convex on the two anterior thirds, sloping on the posterior third, and about as long as the maximum head length (mandibles included). Pronotal and propodeal sutures superficially impressed. Basal face of the propodeum declivous posteriorly. Area between the basal and declivous Faces of the propodeum gently concave, dorsally variably carinate and laterally with a broad tooth. Declivous face of the propodeum gently sloping posteriorly. Sides of the declivous face of the propodeum carinate. Propodeal spiracle round and above mid height in lateral view.

Petiole rectangular and broad. Anterior border of the petiole straight and anterolaterally carinate, with the posterodorsal border of the node superficially carinate and medially angulate in dorsal view. Ventral process of the petiole large, lamelliform, oblique anteriorly and pointed posteriorly. Postpetiole in dorsal view with the sides diverging on the anterior half and gently convex on the posterior half. Postpetiolar sternite anteromedially with a marked subtriangular projection, gently convex posteriorly in side view. Constriction between postpetiole and gaster impressed. Gastral tergite I about ½ longer than the postpetiole and convex on the curvature. Remaining gastral tergites and sternites curved ventrally.

Legs moderately elongate. All tibiae with a pectinate spur. Spurs of fore legs without basal spine. Fore basitarsi longer than the mid ones. Hind basitarsi about 1/4 or 1/5 shorter than hind tibiae. Second tarsomere of hind leg shorter than pretarsus. Pretarsal claws simple. Arolia absent.

Sculpture. Head and rnesosoma minutely punctate, reticulorugose, the reticulation larger on the sides of the head, the rugosities thicker and slightly longitudinal on the head sides and slightly concentric on the pronotum and on the mesonotum. Petiole and postpetiole reticulate, the reticulation deep and foveae-like. First gastral tergite smooth and with minute piligerous punctures. Legs punctate.

Body covered by hairs of three types: (1) short, dense, suberect or subdecumbent, erect and sparse on the f'uriicular joints; (2) longer than type (1), erect, absent on the antennae; (3) shorter than hair type (1), dense and decumbent on the funicular joints. In addition the funicular joints bear whitish, thick, appressed, sparse hairs, and the scapes with sparse hairs similar to type (2) but slightly shorter.

Colour. Ferrugineous-brown with lighter antennae and legs.

Measurements in mm and Indices: TL 3.86-5.03; HL 0.84-1.04; HW 0.83-1.02; EL 0.04-0.06; SL 0.60-0.71; WL 1.08-1.36; PeL 0.28-0.39; PeW 0.38-0.51; HFeL 0.68-0.86; HTiL 0.55-0.69; HBaL 0.41-0.55; LS4 0.44-0.64; LT4 0.82-1.12; CI 98.0-98.8; SI 68.2-1.4; IGR 0.54-0.57.

Queen

Baroni Urbani and de Andrade (2003) - Differing from the worker in the following details: eyes large, slightly more than 1/4 of the head length, composed by many facets and with ocular pilosity. Ocelli well developed.

Mesosoma robust and gently convex in side view. Parapsidal furrows marked. Scutellum with the sides converging posteriorly and with the posterior border round. Dorsum of the mesonotum and scutellum with a longitudinal carina thicker posteriorly. Metanotum with a large lamellaceous tooth. Basal face of the propodeum flat.

Fore wings of our type 4, hind wings of our type 3 as defined in the description of the genus.

Sculpture. Mesosoma variably reticulorugose, sometimes the rugulae absent.

Measurements in mm and Indices: TL 5.23-5.43; HL 1.04-1.08; HW 1.00-1.02; EL 0.28-0.30; SL 0.71-0.73; WL 1.52-1.60; PeL 0.39; PeW 0.56; HFeL 0.94-0.97; HTiL 0.71-0.75; HBaL 0.60-0.62; LS4 0.63-0.72; LT4 1.16-1.28; CI 94.4-96.1; SI 67.6-69.2; IGR 0.53-0.56.

Male

Baroni Urbani and de Andrade (2003) - Head slightly broader than long. Vertex in full face view strongly convex. Vertexal margin carinate. Clypeus reduced, truncate and as long as or slightly longer than the antennal sockets. Frontal carinae thin, low, parallel. Frontal area convex anteriorly and concave posteriorly. Ocelli large. Compound eyes large and occupying mostly the anterior part of the head sides. Scapes almost reaching the anterior ocellus. First funicular joint about 1/2 shorter than the second joint. Joints 2-12 much longer than broad. Last funicular joint about as long as the sum of joints 10-11. Mandibles edentate and only with a pointed apical tooth. Palp formula 5,2.

Mesosoma robust and convex in profile. Pronotum and anterior third of mesonotum almost perpendicular to the posterior two thirds of the mesonotum. Parapsidal furrows marked. Scutellum slightly higher than the mesonotum; posterior border of scutellum round. Basal face of the propodeum flat and with an incision prolonging to the anterior part of the declivous face medially. Sides between basal and declivous faces of the propodeum angulate. Declivous face of propodeum flat. Metanotum with a median, broad, spiniform tooth. Lower part of the propodeal lobes truncate and upper part round and partially lamelliform. Propodeal spiracles small.

Petiole in side view with truncate or declivous anterior face, the node subrectangular. Anterior border of the petiole laterally carinate. Subpetiolar process as in the worker and gyne but less developed. Postpetiole anteriorly slightly broader than the petiole; postpetiolar sides gently convex. Anterior border of the postpetiolar sternite with a superficial triangular "lip". Gastral tergite I convex in side view. Gastral sternite I large. Remaining gastral tergites and sternites slightly curved ventrally.

Legs as in the worker but more elongate. Hind basitarsi slightly shorter than hind tibiae.

Fore wings of our type 4, hind wings of our type 3 as defined in the description of the genus.

Sculpture. Head, mesosoma and petiole reticulorugose, this sculpture more marked and larger on the propodeum. Postpetiole and gaster smooth and with minute piligerous punctures. Legs superficially smooth and minutely punctate.

Pilosity as in the worker but with the hairs of type (2) slightly longer on the gaster.

Colour. Head, dorsum of the mesosoma and of the petiole dark brown-black with the remaining body parts lighter.

Measurements in mm and Indices: TL 4.14-4.60; HL 0.71-0.78; HW 0.74-0.80; EL 0.35-0.39; SL 0.38-0.40; WL 1.36.1.54; PeL 0.29-0.33; PeW 0.38-0.43; HFeL 0.83-0.91; HTiL 0.59-0.69; HBaL 0.57-0.64; LS4 0.49-0.64; LT4 0.87-1.12; CI 102.6-104.2; SI 51.3-53.5; IGR 0.56-0.61.

Type Material

Type locality: Carolina, USA. Type material: holotype gyne without postpetiole and gaster labelled "Carolina, TYPE, crocea Roger, Proceratium croceum Rog, Zool. Mus. Berlin", in ZMBC, examined.

References

References based on Global Ant Biodiversity Informatics

  • Annotated Ant Species List Ordway-Swisher Biological Station. Downloaded at http://ordway-swisher.ufl.edu/species/os-hymenoptera.htm on 5th Oct 2010.
  • Baroni Urbani C., and M.L de Andrade. 2003. The ant genus Proceratium in the extant and fossil record (Hymenoptera: Formicidae). Museo Regionale di Scienze Naturali, Monografie 36: 1-480.
  • Colby, D. and D. Prowell. 2006. Ants (Hymenoptera: Formicidae) in Wet Longleaf Pine Savannas in Louisiana. Florida Entomologist 89(2):266-269
  • Cole A. C., Jr. 1953. A checklist of the ants (Hymenoptera: Formicidae) of the Great Smoky Mountains National Park, Tennessee. Journal of the Tennessee Academy of Science 28: 34-35.
  • Del Toro, I. 2010. PERSONAL COMMUNICATION. MUSEUM RECORDS COLLATED BY ISRAEL DEL TORO
  • Deyrup, M. 2003. An updated list of Florida ants (Hymenoptera: Formicidae). Florida Entomologist 86(1):43-48.
  • Deyrup, M. and J. Trager. 1986. Ants of the Archbold Biological Station, Highlands County, Florida (Hymenoptera: Formicidae). Florida Entomologist 69(1):206-228
  • DuBois M. B. 1985. Distribution of ants in Kansas: subfamilies Ponerinae, Ecitoninae, and Myrmicinae (Hymenoptera: Formicidae). Sociobiology 11: 153-265
  • Forster J.A. 2005. The Ants (hymenoptera: Formicidae) of Alabama. Master of Science, Auburn University. 242 pages.
  • Frye J. A., T. Frye, and T. W. Suman. 2014. The ant fauna of inland sand dune communities in Worcester County, Maryland. Northeastern Naturalist, 21(3): 446-471.
  • General D. M., and L. C. Thompson. 2011. New Distributional Records of Ants in Arkansas for 2009 and 2010 with Comments on Previous Records. Journal of the Arkansas Academy of Science 65: 166-168.
  • Guénard B., K. A. Mccaffrey, A. Lucky, and R. R. Dunn. 2012. Ants of North Carolina: an updated list (Hymenoptera: Formicidae). Zootaxa 3552: 1-36.
  • Ipser R. M. 2004. Native and exotic ants (Hymenoptera: Formicidae) of Georgia: Ecological Relationships with implications for development of biologically-based management strategies. Doctor of Philosophy thesis, University of Georgia. 165 pages.
  • Ivanov K., L. Hightower, S. T. Dash, and J. B. Keiper. 2019. 150 years in the making: first comprehensive list of the ants (Hymenoptera: Formicidae) of Virginia, USA. Zootaxa 4554 (2): 532–560.
  • Lynch J. F. 1988. An annotated checklist and key to the species of ants (Hymenoptera: Formicidae) of the Chesapeake Bay region. The Maryland Naturalist 31: 61-106
  • MacGown J. A., J. G. Hill, R. L. Brown, T. L. Schiefer, J. G. Lewis. 2012. Ant diversity at Noxubee National Wildlife Refuge in Oktibbeha, Noxubee, and Winston Counties, Mississippi. Mississippi Agricultural and Forestry Experiment Station Bulletin 1197: 1-30
  • MacGown J. A., and R. L. Brown. 2006. Survey of the ants (Hymenoptera: Formicidae) of the Tombigbee National Forest in Mississippi. Journal of the Kansas Entomological Society 79(4):325-340.
  • MacGown, J.A and J.A. Forster. 2005. A preliminary list of the ants (Hymenoptera: Formicidae) of Alabama, U.S.A. Entomological News 116(2):61-74
  • MacGown, J.A. and JV.G. Hill. Ants of the Great Smoky Mountains National Park (Tennessee and North Carolina).
  • MacGown, J.A. and R.L. Brown. 2006. Survey of the ants (Hymenoptera: Formicidae) of the Tombigbee National Forest in Mississippi. Journal of the Kansas Entomological Society 79(4):325-340.
  • MacGown, J.A., J.G. Hill, R.L. Brown and T.L. 2009. Ant Diversity at Noxubee National Wildlife Refuge in Oktibbeha, Noxubee, and Winston Counties, Mississippi Report #2009-01. Schiefer. 2009.
  • Moser J. C. and M. S. Blum. 1960. The Formicidae of Louisiana. Insect Conditions in Louisiana 3: 48-50
  • O'Neill J.C. and Dowling A.P.G. 2011. A Survey of the Ants (hymenoptera: Formicidae) of Arkansas and the Ozark Mountains. An Undergraduate Honors, University of Arkansas. 18pages.
  • Van Pelt A. F. 1966. Activity and density of old-field ants of the Savannah River Plant, South Carolina. Journal of the Elisha Mitchell Scientific Society 82: 35-43.
  • Van Pelt A., and J. B. Gentry. 1985. The ants (Hymenoptera: Formicidae) of the Savannah River Plant, South Carolina. Dept. Energy, Savannah River Ecology Lab., Aiken, SC., Report SRO-NERP-14, 56 p.
  • Wheeler G. C., and J. Wheeler J. 1989. A checklist of the ants of Oklahoma. Prairie Naturalist 21: 203-210.
  • Young J., and D. E. Howell. 1964. Ants of Oklahoma. Miscellaneous Publication. Oklahoma Agricultural Experimental Station 71: 1-42.
  • Young, J. and D.E. Howell. 1964. Ants of Oklahoma. Miscellaneous Publications of Oklahoma State University MP-71