Crematogaster baduvi

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Crematogaster baduvi
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Myrmicinae
Tribe: Crematogastrini
Genus: Crematogaster
Species group: baduvi
Species: C. baduvi
Binomial name
Crematogaster baduvi
Forel, 1912

Crematogaster baduvi casent0193723 p 1 high.jpg

Crematogaster baduvi casent0193723 d 1 high.jpg

Specimen Labels

Specimens from Endau Rompin National Park, W. Malaysia and Brunei were collected by fogging method. (Hosoishi and Ogata 2016)

Identification

Hosoishi and Ogata (2016) - In the worker this species can be distinguished from all other members of the C. baduvi group by the smooth and shining surfaces of mesosoma, propodeal dorsum (with rugulae), and the very long propodeal spines that are divergent and straight toward tip. This species is similar to C. brunensis, but can be distinguished from it by the larger head (HW 0.47–0.57, HL 0.48–0.59 vs. 0.43–0.47 and 0.46–0.49 in the latter), shorter scape (SI 98–108 vs. 113–118) and shorter propodeal spines (PSL 0.15–0.21 vs. 0.20–0.22).

Specimens from Brunei have the anterior mesonotal ridges higher than posterior mesonotal ridges in lateral view.

Keys including this Species

Distribution

Malaysia (Peninsula), Brunei, and Indonesia (Krakatau, Sumatra, Java).

Distribution based on Regional Taxon Lists

Indo-Australian Region: Brunei Darussalam, Indonesia (type locality), Krakatau Islands, Malaysia.

Distribution based on AntMaps

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Distribution based on AntWeb specimens

Check data from AntWeb

Biology

Castes

Worker

Nomenclature

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

  • baduvi. Crematogaster baduvi Forel, 1912d: 106 (w.) INDONESIA (Java). Forel, 1913k: 77 (q.); Menozzi, 1935a: 104 (m.). Combination in C. (Orthocrema): Emery, 1922e: 131. [Misspelled as batuvi: Crawley, 1924: 394.]

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

Description

Worker

Hosoishi and Ogata (2016) - (n = 17): HW 0.47–0.57; HL 0.48–0.59; CI 92–100; SL 0.47–0.58; SI 98–108; EL 0.11–0.14; PW 0.26–0.35; WL 0.60–0.72; PSL 0.15–0.21; PtL 0.23–0.28; PtW 0.15–0.20; PtH 0.13–0.16; PpL 0.13–0.16; PpW 0.16–0.20; PtHI 54–67; PtWI 65–83; PpWI 113–146; WI 90–107.

Workers monomorphic. Head round in full-face view. Mandibles with four teeth arranged at an equal distance, apical and subapical teeth large, basal two teeth smaller. Anterior clypeal margin convex in medial portion. Compound eyes distinctly projecting beyond lateral margins of head in full-face view. Scapes exceeding posterolateral corners of head.

Pronotal collar with concave anterior margin in dorsal view, slightly lower than pronotum in lateral view. Pronotal dorsum without distinct ridges laterally. Mesonotal dorsum with lateral ridges that extend posteriad to tips of propodeal spines; anterior ridges usually as high as posterior ridges. Pronotum and mesonotum in lateral view forming evenly arched, continuous dorsal outline. Metanotal groove in dorsal view transverse, almost straight in median portion, forming shallow concavity that is laterally margined by ridges. Propodeal spiracles oval, situated at posterolateral corners of propodeum, apart from metapleural gland bullae. Propodeal spines developed, longer than diameter of propodeal spiracles, in dorsal view strongly divergent.

Petiole in dorsal view with subparallel sides and narrow short peduncle anteriorly, distinctly longer than wide. Posterior portion of petiole with short process that is slightly higher than posterior margin of petiole disc in lateral view. Subpetiolar process weakly developed as angulate tubercle. Postpetiole in lateral view with strongly convex dorsum, distinctly higher than petiole, in dorsal view as wide as petiole, globular, not bilobed. Venter of postpetiole convex but without distinct process.

Integument essentially smooth and shining. Dorsal surface of head smooth and shining. Mandibles with feeble rugulae and smooth interspaces. Clypeus smooth and shining without distinct longitudinal rugulae, but short rugulae present anteriorly in some specimens. Dorsal and lateral surfaces of pronotum smooth and shining; anterolateral shoulders of pronotum with rugulae. Mesopleura generally sculptured, but sometimes smooth except for their marginal areas in some specimens. Dorsal surface of propodeum generally smooth and shining, but with rugulae dorsolateral areas. Dorsal surface of petiole smooth and shining. Lateral surface of petiole sculptured. Dorsal and lateral surfaces of postpetiole smooth and shining.

Standing pilosity sparse. Dorsal face of head with long erect and short appressed setae sparsely. Clypeus with two pairs of long setae in anterior portion, one directed upward and the other downward. Anterior clypeal margin with one pair of long setae medially and some pairs of short setae laterally. Scapes with appressed setae. Mesosoma with two pairs of long erect and stout setae (ps1PN and psaMN) that are much longer than other erect setae. Posterolateral tubercles of petiole posteriorly with one pair of long setae. Postpetiole with one pair of long setae on disc posteriorly. Fourth abdominal tergite with erect setae sparsely, but no decumbent to appressed setae.

Body red-brown. Apical two flagellar segments yellow, contracting with other flagellar segments that are blackish.

Type Material

Hosoishi and Ogata (2016) - One syntype worker, Nusa Kambangan, Java, Indonesia (Musee d'Histoire Naturelle Genève, examined).

References