Acanthostichus laticornis

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Acanthostichus laticornis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dorylinae
Genus: Acanthostichus
Species: A. laticornis
Binomial name
Acanthostichus laticornis
Forel, 1908

Acanthostichus laticornis casent0281970 p 1 high.jpg

Acanthostichus laticornis casent0281970 d 1 high.jpg

Specimen Labels

Synonyms

Mackay (1996) - One nest found under large rock, numerous workers, single female, apparently in a termite nest. A staphylinid (Aleocharinae: Paradoxenusa silvestrii Bruch) occurs with this species (Bruch, 1937). These ants forage in columns similar to Eciton, but smaller; they prey on termites (Kusnezov, 1962).

Identification

A member of the serratulus species complex. Mackay (1996) - The worker is similar to that of Acanthostichus kirbyi, but is easily distinguished by the short, thick scapes with a well formed angle (Fig. 4). The female is very similar to that of Acanthostichus quadratus, but differs in that the anterior surface of the scape is angulate and the female of this species possesses a well developed malar groove. The male is almost indistinguishable from that of A. laticornis. It differs primarily in that the sculpture of the propodeum is rougher.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Argentina, Brazil, Paraguay (type locality), Uruguay.


Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Nomenclature

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

  • laticornis. Acanthostichus laticornis Forel, 1908c: 345 (w.) PARAGUAY.
    • Type-material: lectotype worker (by designation of Mackay, 1996: 159), 12 paralectotype workers.
    • Type-locality: lectotype Paraguay: San Bernardino (Fiebrig); paralectotypes with same data.
    • [Note: Mackay, 1996: 159, adds that 2 more possible original syntypes are in MACN.]
    • Type-depositories: MHNG (lectotype); MHNG, NHMB (paralectotypes).
    • Santschi, 1933e: 106 (m.); Mackay, 1996: 158 (q.).
    • Combination in A. (Acanthostichus): Emery, 1911d: 13.
    • Status as species: Emery, 1911d: 13; Forel, 1911c: 288; Santschi, 1916e: 365; Santschi, 1933e: 106; Wheeler, W.M. 1934g: 162 (in key); Kusnezov, 1962a: 131; Kempf, 1972a: 10; Brown, 1975: 42; Zolessi, et al. 1988: 3; Bolton, 1995b: 54; Mackay, 1996: 158 (redescription); Wild, 2007b: 23.
    • Senior synonym of obscuridens: Kusnezov, 1962a: 131; Kempf, 1972a: 10; Brown, 1975: 42; Bolton, 1995b: 54; Mackay, 1996: 158.
    • Distribution: Argentina, Brazil, Paraguay, Uruguay.
  • obscuridens. Acanthostichus laticornis var. obscuridens Santschi, 1934c: 23 (w.q.m.) ARGENTINA (Misiones).
    • Type-material: lectotype worker (by designation of Mackay, 1996: 159), 9 paralectotype workers.
    • Type-locality: lectotype Argentina: Misiones, Loreto, 24.viii.1933 (A.A. Ogloblin); paralectotypes with same data.
    • Type-depositories: NHMB (lectotype); MZSP, NHMB (paralectotypes).
    • Bruch, 1934a: 4 (q.m.).
    • Subspecies of laticornis: Bruch, 1934a: 4.
    • Junior synonym of laticornis: Kusnezov, 1962a: 131; Kempf, 1972a: 10; Brown, 1975: 42; Bolton, 1995b: 54; Mackay, 1996: 158.

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

Description

Worker

Mackay 1996. Figures 1-10.
Mackay 1996. Figures 11-33.

Mackay (1996) - HL 1.01-1.31, HW 0.86-1.20, SL 0.50-0.66, SW 0.23-0.29, FL 0.70-0.95, FW 0.24-0.35, WL 1.28-1.73, PW 0.38-0.53, PL 0.46-0.65, SI 49-50, CI 85-91, PI 123-124, FI 271-295, SL/SW 2.22-2.30.

Mandibles without teeth. but with slight undulations. lateral clypeal teeth well developed; scape relatively short and thick. with well developed angle (Fig. 4); vertex concave; petiole somewhat elongate. subpetiolar process rounded anteriorly with sharp ventral apex posteriorly (Fig. 27); femur not thickened.

Queen

Mackay (1996) - HL 1.64, HW 1.82, SL 0.73, SW 0.34, EL 0.20, WL 2.20, PW 1.60, PL 0.81, SI 45, CI 111, PI 51, SL/SW 2.15.

Mandibles without teeth; lateral clypeal angles well formed; malar groove well developed. but extending only ½ distance to eye; outer margin of scape angulate as in worker; femora not incrassate; petiole much wider than long, wider at posterior end. Entire ant covered with scarce, flexuous hairs, concolorous light brown.

Male

Mackay (1996) - HL 0.74-0.95, HW (posterior to eye) 0.66-0.96, SL 0.20-0.28, EL 0.39-0.48, WL 1.66-1.68, PW 0.36-0.39, PL 0.45-0.51, SI 27-29, CI 90-101, PI 124-132.

The male is similar to those of other species in the genus and is difficult to separate. Apparently the shape of the volsellae, shape of the petiole and sculpturing of the propodeum will separate this species from some of the other species (see key). The scape is slightly thickened, but bears no resemblance to the characteristic shape of the scape of the worker.

Type Material

Mackay (1996) - Worker. PARAGUAY: San Bernardino 15 cotype workers (12 worker cotypes, Musee d'Histoire Naturelle Genève, 1 worker cotype, Naturhistorisches Museum, Basel, 2 workers, possibly cotypes, Museo Argentino de Ciencias Naturales) [all seen]. Acanthostichus laticornis, lectotype worker (here designated) (MHNG) and eleven paralectotype workers (MHNG), 1 paralectotype worker (NHMB), PARAGUAY. San Bernardino (Fiebig); A. laticornis Forel worker type Formic #5944., oll. Forel [all seen]. Two possible cotype workers in MACN. Acanthostichus laticornis var. obscuridens, ARGENTINA. Misiones. Estacion Experimental Loreto. Dr. A. A. Oglobin, 24-viii-1933, female, lectotype worker (here designated) (NHMB) and 4 paralectotype workers (NHMB) [seen], five paralectotype workers (Museu de Zoologia da Universidade de Sao Paulo) [seen].

References

  • Bruch, C. 1934a. La hembra dictadiforme de Acanthostichus laticornis For. v. obscuridens Sants. (Hymenoptera Formicidae). Rev. Soc. Entomol. Argent. 6: 3-8.
  • Forel, A. 1908h. Ameisen aus Sao Paulo (Brasilien), Paraguay etc. gesammelt von Prof. Herm. v. Ihering, Dr. Lutz, Dr. Fiebrig, etc. Verh. K-K. Zool.-Bot. Ges. Wien 58: 340-418 (page 345, worker described)
  • Kusnezov, N. 1962a. El género Acanthostichus Mayr (Hymenoptera, Formicidae). Acta Zool. Lilloana 18: 121-138 (page 131, senior synonym of obscuridens)
  • Mackay, W. P. 1996. A revision of the ant genus Acanthostichus (Hymenoptera: Formicidae). Sociobiology 27: 129-179 (page 158, queen described)
  • Santschi, F. 1933f. Fourmis de la République Argentine en particulier du territoire de Misiones. An. Soc. Cient. Argent. 116: 105-124 (page 106, male described)

References based on Global Ant Biodiversity Informatics

  • Borowiec M. L. 2016. Generic revision of the ant subfamily Dorylinae (Hymenoptera, Formicidae). ZooKeys 608: 1–280.
  • Brown W. L., Jr. 1975. Contributions toward a reclassification of the Formicidae. V. Ponerinae, tribes Platythyreini, Cerapachyini, Cylindromyrmecini, Acanthostichini, and Aenictogitini. Search Agric. (Ithaca N. Y.) 5(1): 1-115.
  • Bruch C. 1934. La hembra dictadiforme de Acanthostichus laticornis For. v. obscuridens Sants. (Hymenoptera Formicidae). Revista de la Sociedad Entomológica Argentina 6: 3-8.
  • Cuezzo, F. 1998. Formicidae. Chapter 42 in Morrone J.J., and S. Coscaron (dirs) Biodiversidad de artropodos argentinos: una perspectiva biotaxonomica Ediciones Sur, La Plata. Pages 452-462.
  • Emery C. 1911. Hymenoptera. Fam. Formicidae. Subfam. Ponerinae. Genera Insectorum 118: 1-125.
  • Esteves F. A., C. R. F. Brandao, and L. P. Prado. 2011. The type specimens of Dorylomorph ants (Hymenoptera, Formicidae: Aenictinae, Ecitoninae, Cerapachyinae, Leptanilloidinae) deposited in the Museu de Zoologia da Universidade de Sao Paulo, Brazil. Papeis Avulsos de Zoologia 51(22): 341-397.
  • Fernández, F. and S. Sendoya. 2004. Lista de las hormigas neotropicales. Biota Colombiana Volume 5, Number 1.
  • Kempf, W.W. 1972. Catalago abreviado das formigas da regiao Neotropical (Hym. Formicidae) Studia Entomologica 15(1-4).
  • Kusnezov N. 1962. El género Acanthostichus Mayr (Hymenoptera, Formicidae). Acta Zoologica Lilloana 18: 121-138.
  • Kusnezov N. 1978. Hormigas argentinas: clave para su identificación. Miscelánea. Instituto Miguel Lillo 61:1-147 + 28 pl.
  • MacKay W. P. 1996. A revision of the ant genus Acanthostichus (Hymenoptera: Formicidae). Sociobiology 27: 129-179
  • Santschi F. 1916. Formicides sudaméricains nouveaux ou peu connus. Physis (Buenos Aires). 2: 365-399.
  • Santschi F. 1933. Fourmis de la République Argentine en particulier du territoire de Misiones. Anales de la Sociedad Cientifica Argentina. 116: 105-124.
  • Santschi F. 1934. Fourmis de Misiones et du Chaco argentin. Revista de la Sociedad Entomológica Argentina. 6: 23-34.
  • Schmidt F. A., and R. R. C. Solar. Is it important to collect hypogaeic ants? How to collect them? Biológico, São Paulo 69(2): 267-270.
  • Schmidt, F.A. and R.R.C Solar. 2010. Hypogaeic pitfall traps: methodological advances and remarks to improve the sampling of a hidden ant fauna. Insectes Sociaux 57:261-266.
  • Vittar, F. 2008. Hormigas (Hymenoptera: Formicidae) de la Mesopotamia Argentina. INSUGEO Miscelania 17(2):447-466
  • Wild, A. L. "A catalogue of the ants of Paraguay (Hymenoptera: Formicidae)." Zootaxa 1622 (2007): 1-55.
  • Zolessi L. C. de, Y. P. Abenante, and M. E. de Philippi. 1988. Lista sistematica de las especies de Formicidos del Uruguay. Comun. Zool. Mus. Hist. Nat. Montev. 11: 1-9.
  • Zolessi L. C. de; Y. P. de Abenante, and M. E. Philippi. 1989. Catálogo sistemático de las especies de Formícidos del Uruguay (Hymenoptera: Formicidae). Montevideo: ORCYT Unesco, 40 + ix pp.
  • de Zolessi, L.C., Y.P. de Abenante and M.E. Phillipi. 1989. Catalago Systematico de las Especies de Formicidos del Uruguay (Hymenoptera: Formicidae). Oficina Regional de Ciencia y Technologia de la Unesco para America Latina y el Caribe- ORCYT. Montevideo, Uruguay