Lachnomyrmex fernandezi

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Lachnomyrmex fernandezi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Lachnomyrmex
Species: L. fernandezi
Binomial name
Lachnomyrmex fernandezi
Feitosa & Brandão, 2008

Lachnomyrmex fernandezi casent0173880 profile 1.jpg

Lachnomyrmex fernandezi casent0173880 dorsal 1.jpg

Specimen labels

Lachnomyrmex fernandezi has been recorded in Colombian submontane forests (440–1800m). Nothing is known of the natural history of this species.

Identification

Feitosa and Brandão (2008) - Body covered by continuous, vermiculate rugae; promesonotum weakly convex in profile; metanotal groove deeply impressed; teeth of propodeal lobes well developed; dorsum of postpetiole with more than 10 long hairs; surface of first gastral tergite somewhat opaque and entirely covered by long flexuous hairs. This species is quite similar to and shares the regular pattern of body sculpturation with Lachnomyrmex haskinsi, Lachnomyrmex mackayi and Lachnomyrmex regularis. However, L. fernandezi differs from these species by the slightly opaque gaster, entirely covered by long flexuous hairs, which are present only near the petiolar insertion in L. mackayi, while in L. haskinsi and L. regularis the gaster is virtually glabrous.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Neotropical Region: Colombia (type locality).

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Very little is known about the biology of these cryptic ants. Workers are frequently found in leaf litter and soil samples processed in Winklers or Berlese extractors, but these ants are never especially abundant within samples. When a dealate gyne is found associated with workers in 1m2 samples of leaf litter, normally it is found singly, which suggests that colonies are relatively small and apparently monogynic; workers and nests are extremely difficult to spot in the field, because the workers are very slow moving and well camouflaged; if there is any leaf-litter nest structure, it is destroyed during sifting, but our impression is that they do not construct any permanent nidal structure. Species of Lachnomyrmex apparently nest within the leaf litter, inside natural cavities of the superficial soil layers, fallen logs, and rotten wood, as evidenced by the large number of soil-covered individuals collected, from information recorded in specimen label data, and from observations of collectors. Workers forage alone, in the leaf litter and in the low vegetation, occasionally among epiphytes and moss, probably preying on small soft-bodied arthropods and possibly harvesting plant exudates. (Feitosa and Brandao 2008)

Castes

Nomenclature

The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • fernandezi. Lachnomyrmex fernandezi Feitosa & Brandão, 2008: 13, figs. 3, 18 (w.) COLOMBIA.

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

Description

Worker

Holotype. HL 0.67; HW 0.65; ML 0.22; SL 0.39; EL 0.14; WL 0.77; PSL 0.19; PL 0.31; PPL 0.16; GL 0.85; TL 2.98; CI 97; SI 61; OI 22. (n=3). HL 0.66; HW 0.64–0.65; ML 0.22–0.23; SL 0.39; EL 0.13–0.14; WL 0.72–0.77; PSL 0.17–0.19; PL 0.29–0.32; PPL 0.14–0.16; GL 0.80–0.87; TL 2.84–2.99; CI 97–98; SI 59–62; OI 20–22.

Color medium to dark brown, with appendages somewhat lighter. Head and mesosoma covered by continuous, somewhat sparse, longitudinal rugae, transverse on anterior portion of pronotum, grading to longitudinal on rest of promesonotum, mesopleura and lateral surfaces of propodeum; mandibles with longitudinal striae restricted to basal portion and external borders; petiole and postpetiole finely and irregularly rugose; surface of gaster opaque, when compared to other species in the genus. Abundant pilosity on head and mesosoma dorsum; dorsum of petiolar node and postpetiole each with more than 10 long hairs; first gastral tergite entirely covered by long flexuous hairs. Head slightly longer than broad, with vertexal margin strongly convex; frontal lobes discretely angulate laterally; eyes well developed, with about seven facets on maximum diameter. Promesonotum only moderately convex in profile, but higher than level of propodeum; metanotal groove relatively narrow and deeply impressed; propodeal spines long and straight; teeth of propodeal lobes well developed, slightly surpassing half-length of propodeal spines. Petiolar node only moderately elevated, dorsally rounded, and with the posterior face gently sloped in lateral view; postpetiole feebly convex dorsally and without ventral processes.

Type Material

Holotype worker. COLOMBIA: Santander: Mpio. Socorro, Vda. Alto Chochos, Fca. El Laurel, 06º28'37"N 73º13'33"W, 23.iii.2004, G. Zabala col., no. 25403, specimen code CASENT0173880 [IHVL]. Paratypes. same data as holotype, no. 25402 (1 worker) [ICNC]; same data, no. 25404 (1 worker) [MZSP]; COLOMBIA: Santander: Charalá Virolin, Cost. El Fara, 06º06'N 73º13'W, 29.iii.1999, E. L. González col., no. 72097 (1 worker) [IHVL]; Tolima: Boquerón, 9.ix.1996, E. Palácio col., no. 72099 (1 worker) [IHVL].

Etymology

This species is named in honor of the Colombian colleague Dr. Fernando Fernández, for his important contribution to Neotropical Myrmecology.

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.