Nylanderia smythiesii

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Nylanderia smythiesii
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Lasiini
Genus: Nylanderia
Species: N. smythiesii
Binomial name
Nylanderia smythiesii
(Forel, 1894)

Nylanderia smythiesii p.jpg

Nylanderia smythiesii d.jpg

This species is generally in distribution in low altitude areas of Northwest India. Nests can be found easily underneath stones and leaf litter whilst foraging workers are fairly frequent on trees and fallen trunks (Wachkoo and Bharti 2014).

Identification

Distinguished by the oval shape of head, and smooth and shiny cuticle without any pubescence.

Keys including this Species

Distribution

Known from low altitude areas of Northwest India.

Distribution based on Regional Taxon Lists

Oriental Region: India (type locality).

Distribution based on specimens

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The above specimen data are provided by AntWeb. Please see Nylanderia smythiesii for further details

Biology

Castes

Queen

Male

Nomenclature

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

  • smythiesii. Prenolepis smythiesii Forel, 1894c: 410, fig. 5 (q.m.) INDIA. Combination in Paratrechina (Nylanderia): Emery, 1925b: 220; in Nylanderia: LaPolla, Brady & Shattuck, 2010a: 127.

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

Description

Worker

Wachkoo and Bharti (2014) - HL 0.60–0.68; HW 0.47–0.56; EL 0.14–0.19; SL 0.70–0.77; PW 0.37–0.43; PrFL 0.56–0.64; PrFW 0.13–0.17; WL 0.73–0.88. Indices: CI 77.68–82.26; SI 137.25–151.16; REL 23.64–27.42 (n = 8).

Wachkoo and Bharti (2015) - HL 0.60-0.68 mm; HW 0.47-0.56 mm; EL 0.14-0.19 mm; SL 0.70-0.77 mm; PW 0.37-0.43 mm; PrFL 0.56-0.64 mm; PrFW 0.13-0.17 mm; WL 0.73-0.88 mm. Indices: CI 77.68-82.26; SI 137.25-151.16; REL 23.64-27.42 (n = 20).

Head broadly oval; distinctly longer than wide, slightly wider posteriorly, lateral margins convex, posterior margin shallowly concave to gently convex with rounded posterolateral corners. Clypeus subcarinate in the middle; anterior clypeal margin weakly concave. Mandibles with six teeth. Eyes oval, weakly convex, covering onethird of lateral cephalic margin; three small ocelli present. Antennae long, scapes surpass the posterior margin by two-fifths their length.

Metanotal groove strongly developed, in lateral view interrupts the regular promesonotal convexity from propodeum; metanotal area long. Dorsal face of propodeal not higher than remainder of the notum, gently rounded; declivity steep.

In lateral view, petiole triangular with dorsum of the petiole well below the dorsum of propodeum, rounded above with posterior face much longer than anterior face.

Overall cuticle very smooth and shiny. Pubescence on body very sparse; almost entirely absent. Scapes and legs covered with abundant erect setae, and a very fine layer of pubescence. Erect setae of varying length cover head, pronotum, mesonotum and gaster. Setae very densely spaced on head and gaster.

Head brown; gaster brown to black; mesosoma, antennae and legs yellowish brown.

Queen

Wachkoo and Bharti (2014) - HL 0.84; HW 0.80; EL 0.30; SL 0.93; PrFL 0.82; PrFW 0.23; WL 0.88. Indices: CI 95.59; SI 115.82; REL 35.71 (n = 1).

Generally matches worker description, with modifications expected for caste and the following differences: Body covered with dense pubescence and fine punctulae. Head subtriangular, posterior margin concave; in lateral view, petiole with flat dorsum. Head yellow brown, gaster brown, a shade lighter than in workers.

Male

Wachkoo and Bharti (2014) - HL 0.52–0.55; HW 0.42–0.46; EL 0.22–0.24; SL 0.66–0.72; PrFL 0.56– 0.62; PrFW 0.13–0.15; WL 0.75–0.85. Indices: CI 80.00–85.42; SI 146.34–157.89; REL 41.67–44.44 (n = 8).

Head broadly oval; longer than wide; eyes large, subglobulose, projecting beyond head outline in full-face view; three prominent ocelli present. Antennae 13 segmented, filiform, scapes long, surpass posterior margin by about half their length. Mandibles slender, curved strap like with prominent, pointed apical and a small preapical tooth, remainder of masticatory margin smooth, without any teeth or denticles. Basal angle rounded, indistinct and seamlessly blends into inner mandibular margin.

Mesosoma enlarged to accommodate flight muscles; in lateral view scutum and scutellum flat; propodeum indistinct, lower than remainder of notum with very short dorsal face and long declivitous face.

Petiole as in worker; gaster elongated.

Parameres paddle-shaped, rounded apically, turning strongly inward toward midline of body posteriorly, as long as digiti; long setae extending off of parameres. Cuspi long and tubular reaching digiti dorsally; bent toward digiti; digiti weakly anvil-shaped; directed upward and covered with short peg-like teeth; digiti visible in lateral view. Penis valves projecting barely past parameres.

Sculpture, vestiture and color as in worker caste.

References