Crematogaster pia

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Crematogaster pia
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species group: ranavalonae
Species: C. pia
Binomial name
Crematogaster pia
Forel, 1911

Crematogaster pia 33a.jpg

Crematogaster pia 33c.jpg

Subspecies

This species inhabits well-developed forests, where it makes carton nests and forages on trees.

Identification

A member of the Crematogaster ranavalonae-group.

Hosoishi (2015): This species is similar to Crematogaster butteli and Crematogaster tumidula, but differs from C. butteli in having an anterolaterally developed petiole, and from C. tumidula in having long propodeal spines.

Keys including this Species

Distribution

Latitudinal Distribution Pattern

Latitudinal Range: 3.9° to 3.9°.

 
North
Temperate 		North
Subtropical 		Tropical South
Subtropical 		South
Temperate

Distribution based on Regional Taxon Lists

Indo-Australian Region: Malaysia (type locality).
Oriental Region: Thailand.

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.
pChart

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

Castes

Worker

Images from AntWeb

Crematogaster pia casent0902126 h 1 high.jpgCrematogaster pia casent0902126 p 1 high.jpgCrematogaster pia casent0902126 d 1 high.jpgCrematogaster pia casent0902126 l 1 high.jpg
Syntype of Crematogaster tumidula pia. Worker. Specimen code casent0902126. Photographer Ryan Perry, uploaded by California Academy of Sciences. Owned by NHMUK, London, UK.

Nomenclature

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

  • pia. Crematogaster tumidula subsp. pia Forel, 1911d: 384 (w.) WEST MALAYSIA.
    • Type-material: lectotype worker (by designation of Hosoishi, 2015: 84), 10 paralectotype workers.
    • Type-locality: lectotype Malaysia: Malacca, Negeri Sembilan, Berhentian Tingi (R. Martin); paralectotypes with same data.
    • Type-depositories: MHNG (lectotype); MHNG, NHMB (paralectotypes).
    • Combination in C. (Acrocoelia): Emery, 1922e: 151;
    • combination in C. (Crematogaster): Bolton, 1995b: 166.
    • Status as species: Emery, 1922e: 151; Chapman & Capco, 1951: 92; Bolton, 1995b: 160; Hosoishi, 2015: 84 (redescription); Khachonpisitsak, et al. 2020: 92.
    • Distribution: Malaysia (Peninsula), Thailand.
    • Current subspecies: nominal plus soengeiensis, taivanae.

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

Description

Worker

Hosoishi (2015) - (workers, n = 11). HW 0.90-0.96; HL 0.88-0.92; CI 102-108; SL 0.79-0.87; SI 83-94; EL 0.18-0.21; PW 0.54-0.59; WL 1.05-1.13; PSL 0.14-0.17; PtL 0.25-0.27; PtW 0.25-0.30; PtH 0.16-0.18; PpL 0.15-0.19; PpW 0.28- 0.31; PtHI 59-69; PtWI 96-115; PpWI 158-187; WI 103-115.

Head appearing subquadratic in front view. Mandible weakly striate, with four teeth, apical and subapincal teeth large, basal two teeth smaller. Scape exceeding posterior corner of head, with appressed setae, each of which is as long as width of scape in length. Compound eye large and slightly projecting beyond lateral margin of head in full face view.

Ventrolateral katepisternal ridge indistinct posteriorly. Propodeal spine long and stout; length longer than spiracle, dorsum as high as anterior propodeum in lateral view; basal width larger than spiracle in diameter. Propodeal spiracle large, situated close to propodeal declivity in lateral view, directed laterally.

In dorsal view, shape of petiole scoop with convex side, as broad as long. Anterolateral corner of petiole angulate. Petiolar spiracle big, as wide as half of propodeal spiracle in diameter, directed laterally. In dorsal view, postpetiole broader than long, bilobed but without longitudinal median sulcus. Postpetiole slightly wider than petiole in dorsal view.

Integument essentially smooth and shiny. Clypeus smooth and shiny without rugulae. Malar region smooth and shiny. Dorsal surface of promesonotum smooth and shiny. Lateral surface of pronotum smooth and shiny. Mesopleuron and lateral propodeum generally shiny, but with feable rugulae. Dorsal surface of propodeum smooth and shiny; anterior dorsum with feable rugulae.

Erect pilosity almost absent. Dorsum of head, clypeus and mesosoma with short and appressed sparse setae. Clypeus with one pair of longer setae on anteriormost portion, directed medially. Anterior clypeal margin with two or three pairs of longer setae on median portion, mixed with some shorter setae on side. No erect setae on pronotal shoulder. Posterolateral tubercle with some decumbent to appressed shorter setae. Ventral surface of petiole with appressed setae. Postpetiole with some shorter setae posteriorly. Fourth abdominal tergite with appressed setae.

Body color reddish brown to brownish.

Type Material

References

References based on Global Ant Biodiversity Informatics

  • Hosoishi S. 2015. Revision of the Crematogaster ranavalonae-group in Asia, with description of two new species (Hymenoptera, Formicidae). Journal of Hymenoptera Research 42: 63-92.
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