Pheidole parvicorpus

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Pheidole parvicorpus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Attini
Genus: Pheidole
Species: P. parvicorpus
Binomial name
Pheidole parvicorpus
Eguchi, 2001

Pheidole parvicorpus casent0281687 p 1 high.jpg

Pheidole parvicorpus casent0281687 d 1 high.jpg

Specimen Labels

This species inhabits well-developed lowland forests, and nests in rotting wood.

Identification

Eguchi (2001) - This tiny species is peculiar among Indo-Malayan small-sized congeners in the following conditions: eye consisting of 5-7 ommatidia in both the subcastes; terminal antennal segment more than 1.6 times as long as preceding two segments together in both the subcastes.

Keys including this Species

Distribution

Distribution based on Regional Taxon Lists

Indo-Australian Region: Borneo (type locality), Indonesia, Malaysia.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Minor

Major

Nomenclature

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

  • parvicorpus. Pheidole parvicorpus Eguchi, 2001b: 86, fig. 33 (s.w.q.) BORNEO.

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

Description

Worker

Eguchi 2001. Figure 33.

Major (n=6): TL l.7-l.9 mm, HL 0.64-0.74 mm, HW 0.53-0.60 mm, SL 0.28-0.30 mm, FL 0.37-0.40 mm, CI 81-83, SI 47-56, FI 64-73. Head broadest at 1/2-3/5 distance of head (as measured from the mid-point of a transverse line spanning the anteriormost and posteriormost projecting points, respectively); in full-face view posterior margin of head shallowly concave (Fig. 33A); head in profile at most very weakly impressed on vertex (Fig. 33B). Hypostoma bearing a pair of distinct median processes. Clypeus without a median longitudinal carina, with anterior margin emarginate medially. Eye situated just in front of 1/3 distance of head, consisting of 5-7 ommatidia (Fig. 33B). Frontal carina and antennal scrobe present only around antennal insertion. Antenna with 3·segmented club; scape extending backward to 1/2-5/9 distance of head; terminal segment 1.6-1.7 times as long as preceding two segments together. Masticatory margin of mandible with apical and preapical teeth, and a denticle in front of basal angle. Promesonotal dome with an inconspicuous prominence on its posterior declivity (Fig. 33C). Mesopleuron without a distinct transverse impression. Propodeal spine almost twice as long as diameter of propodeal spiracle. Petiole l.6-l.7 times as long as postpetiole (excluding helcium); petiolar node in posterior view not emarginate at apex. Postpetiole 1.4-1.5 times as broad as petiolar node.

Dorsum of head above subocular level weakly rugose longitudinally and weakly shining; upper part of mesopleuron dull; dorsum of propodeum punctured; remainder of alitrunk smooth and shining largely; lateral face of petiole very weakly punctured and weakly shining; dorsum of petiole, and postpetiole and gaster smooth and shining. Outer face of mandible sparsely covered with appressed to decumbent hairs, which are 0.02-0.04 mm in length and a little shorter than distance between piligerous punctures. Body light yellowish-brown with darker mandibles.

Minor (n=6): TL 1.1-1.3 mm, HL 0.38-0.42 mm, HW 0.37-0.39 mm, SL 0.24-0.27 mm, AL 0.46-0.49 mm, FL 0.29-0.31 mm, CI 92-96, SI 65-71, FI 78-81. Head in full-face view weakly concave posteriorly (Fig. 330); occipital carina absent dorsally on head. Clypeus without a median longitudinal carina, with anterior margin in full-face view slightly convex or truncate medially. Eye situated at about 2/5 distance of head (as measured from the anteriormost to posteriormost of head), consisting of 5-6 ommatidia. Frontal carina and antennal scrobe present only around antennal insertion. Antenna with 3-segmented club; scape extending backward to about 5/6 distance of head; terminal segment 1.6-1.7 times as long as preceding two segments together. Promesonotum low, relatively flat dorsally (Fig. 33E). Mesopleuron with a weak transverse impression. Propodeal spine ca. 1.5 times as long as diameter of propodeal spiracle. Petiole 1.6-1.7 times as long as postpetiole (excluding helcium). Postpetiole 1.5-1.6 times as broad as petiolar node.

Clypeus almost smooth, or very weakly punctured and weakly shining; remainder of dorsum of head above subocular level weakly rugose longitudinally and weakly shining; venter of head below subocular level largely smooth and shining; remainder of body largely smooth and shining. Body yellow to light yellowish-brown.

Paratype Specimen Labels

Type Material

Holotype Major, colony: Eg97-BOR-S84, Gunong Rara (4°S8'N 117°S'E, ca. 250 malt.), Sabah, E. Malaysia (Borneo), K. Eguchi leg., 1997, deposited in Universiti Malaysia Sabah. Paratypes 9 majors, 16 minors and 2 queens from the same colony to which the holotype belongs, deposited in The Natural History Museum, Museum Brunei, Museo Civico di Storia Naturale, Genoa, Museum of Comparative Zoology, Musee d'Histoire Naturelle Genève, Museo Civico di Storia Naturale, Milano, Naturhistorisches Museum Wien, Vienna and Universiti Malaysia Sabah.

References