Lachnomyrmex grandis

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Lachnomyrmex grandis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Lachnomyrmex
Species: L. grandis
Binomial name
Lachnomyrmex grandis
Fernández & Baena, 1997

Feitosa and Brandão (2008) - According to the original description, the Colombian specimens were collected manually while foraging in the vegetation of a 520m elevation wet forest. The Costa Rica material was extracted from sifted litter samples from Atlantic slope to 500m elevation forests (Longino 2007). This species was known previously only by the type series (two workers from Colombia). The study of Costa Rican material revealed new records of this rarely collected species. The presence of this species in Costa Rica and Colombia, suggests that it may probably occur in Panama.

Identification

Feitosa and Brandão (2008) - Comparatively large species (HW ≥ 0.90mm, WL ≥ 1.20mm); metanotal groove broadly impressed; first tergite of gaster with extremely long hairs. Lachnomyrmex grandis is the largest species known for the genus. Besides its size, this species can be separated from the others by the combination of irregular sculpture, metanotal groove broadly impressed, and the presence of very long hairs on the gaster. In some individuals, long hairs occur only on the anterior third, while in other specimens they cover nearly entirely the surface of first gastral tergite.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 10.433° to 10.333°.

 
North
Temperate
North
Subtropical
Tropical South
Subtropical
South
Temperate

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia (type locality), Costa Rica, Guatemala, Nicaragua.

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

Explore-icon.png Explore Overview of Lachnomyrmex biology 
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Castes

Nomenclature

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

  • grandis. Lachnomyrmex grandis Fernández & Baena, 1997: 111, fig. 2 (w.) COLOMBIA. Feitosa & Brandão, 2008: 17 (q.).

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

Description

Worker

Feitosa and Brandão (2008) - Holotype. HL 0.96; HW 0.91; ML 0.38; SL 0.69; EL 0.16; WL 1.28; PSL 0.32; PL 0.49; PPL 0.25; GL 1.18; TL 4.54; CI 95; SI 76; OI 18. Worker. HL 0.94; HW 0.91; ML 0.35; SL 0.69; EL 0.17; WL 1.26; PSL 0.30; PL 0.49; PPL 0.25; GL 1.06; TL 4.35; CI 96; SI 75; OI 19.

Color light to dark reddish brown, with lighter appendages. Body densely covered by vermiculate rugae, forming irregular areolae on promesonotum; rugae somewhat longer and longitudinal on cephalic dorsum, and slightly sparser on mesopleura and lateral surfaces of propodeum; mandibles longitudinally striate, except for the apical and masticatory portions; petiole and postpetiole irregularly rugose. Abundant pilosity; dorsum of petiolar node and postpetiole each with more than 10 long hairs; first gastral tergite bearing extremely long flexuous hairs.

Head longer than broad, with vertexal margin weakly convex; frontal lobes subquadrate; eyes well developed, with about seven facets on maximum diameter. Promesonotum moderately convex in profile; metanotal groove broadly impressed; propodeal spines long and straight; teeth of propodeal lobes well developed, but not surpassing the half-length of propodeal spines. Petiolar node elevated, almost subtriangular in profile, but dorsally rounded, and with the posterior face gently sloped in lateral view; postpetiole dorsally convex and with a discrete anteroventral projection.

Queen

Feitosa and Brandão (2008) - HL 1.04; HW 0.99; ML 0.41; SL 0.72; EL 0.26; WL 1.51; PSL 0.32; PP 0.63; PPL 0.31; GL 1.52; TL 5.43; CI 95; SI 73; OI 26.

Similar to worker. Head and pronotum strongly areolate-rugose; mesopleura and lateral faces of propodeum longitudinally rugose. Eyes with around 16 facets at maximum diameter. Propodeal spines shorter than in the conspecific workers. Petiolar node relatively low

Etymology

Feitosa and Brandão (2008) - The name refers to the relative large size of this species. From Latin, grandis: large.

References

  • Feitosa, R.M. & Brandão, C.R.F. 2008. A taxonomic revision of the Neotropical myrmicine ant genus Lachnomyrmex Wheeler (Hymenoptera: Formicidae). Zootaxa 1890, 1-49.
  • Fernández, F.; Baena, M. L. 1997. Hormigas de Colombia VII: nuevas especies de los géneros Lachnomyrmex Wheeler y Megalomyrmex Forel (Hymenoptera: Formicidae). Caldasia 19: 109-114 (page 111, fig. 2 worker described)

References based on Global Ant Biodiversity Informatics

  • Feitosa, R.M. and C.R.F Brandao. 2008. A taxonomic revision of the Neotropical myrmicine ant genus Lachnomyrmex Wheeler (Hymenoptera: Formicidae). Zootaxa 1890:1-49
  • Gonzalo Andrade-C. M., and J. D. Lynch. 2007. Los tipos nomenclatures depositaods en la colleccion zoologica del instituto de ciencias naturales. INSTITUTO DE CIENCIAS NATURALES-FACULTAD DE CIENCIAS UNIVERSIDAD NACIONAL DE COLOMBIA BIBLIOTECA JOSÉ JERÓNIMO TRIANA No. 16, 212 pages.
  • Longino J. T. 2013. Ants of Nicargua. Consulted on 18 Jan 2013. https://sites.google.com/site/longinollama/reports/ants-of-nicaragua
  • Longino J. et al. ADMAC project. Accessed on March 24th 2017 at https://sites.google.com/site/admacsite/