Cladomyrma nudidorsalis

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Cladomyrma nudidorsalis
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Formicinae
Tribe: Plagiolepidini
Genus: Cladomyrma
Species: C. nudidorsalis
Binomial name
Cladomyrma nudidorsalis
Agosti, Moog & Maschwitz, 1999

Cladomyrma nudidorsalis casent0173892 profile 1.jpg

Cladomyrma nudidorsalis casent0173892 dorsal 1.jpg

Specimen labels

This species has been collected from Drypetes longifolia and Ryparosa fasciculata. Cladomyrma nudidorsalis seems to be much less common than the syntopic Cladomyrma petalae, but this is based on the eclectic set of field collections and existing specimen records gathered for this study. (Agosti et al. 1999)


Agosti et al. (1999) placed Cladomyrma species into two groups based on the shape of the queen's petiole, raised (an erect node or scale) or depressed (dorsally truncate and low). Cladomyrma nudidorsalis belongs to the depressed petiole group.

This species is easily recognized in the queen by the lack of erect hairs on the dorsum of the alitrunk and the very short hairs on the gastral tergites, unique characters within the genus. However, other queen characters are very similar to those of Cladomyrma petalae (e.g., size, body color, petiole, pubescence), and the distinction from C. petalae is mainly based on the difference of the distribution of setae, a rather variable character in C. petalae. Another trait may prove to be of importance: the workers of C. nudidorsalis tend to be of a lighter body color than C. petalae, but a larger sample size is needed to assess possible variation.

Keys including this Species


Distribution based on Regional Taxon Lists

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

Distribution based on AntMaps


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.

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.




Images from AntWeb

Cladomyrma nudidorsalis casent0173893 head 1.jpgCladomyrma nudidorsalis casent0173893 profile 1.jpgCladomyrma nudidorsalis casent0173893 dorsal 1.jpgCladomyrma nudidorsalis casent0173893 label 1.jpg
Paratype of Cladomyrma nudidorsalisWorker. Specimen code casent0173893. Photographer April Nobile, uploaded by California Academy of Sciences. Owned by CAS, San Francisco, CA, USA.


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

  • nudidorsalis. Cladomyrma nudidorsalis Agosti, Moog & Maschwitz, 1999: 13, figs. 15, 27 (s.w.q.) WEST MALAYSIA.

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



Major worker. AL 0.90–1.14, HL 0.94–1.14, HW 0.81–0.94, EL 0.18–0.22, SL 0.44–0.54, CI 86–92, EI 19–22, SI 49–54 (n 5 4).

Small body size; clypeus angulate with longitudinal striae; metapleural gland orifice small; body color brown with mandibles and other appendages slightly lighter colored; gastral pubescence long and dense.

Minor worker. AL 0.76–0.88, HL 0.67–0.76, HW 0.52–67, EL 0.13–0.16, SL 0.36–0.40, CI 78–90, EI 23–25, SI 54–69 (n = 7). Small body size; metapleural gland orifice small; body color brown to light yellowish brown; gastral pubescence long and dense.


Queen. AL 2.20–2.40, HL 1.38–1.58, HW 1.18–1.26, EL 0.46–0.49, SL 0.62–0.68, CI 80–86, EI 39, SI 53–54 (n = 2). Holotype: AL 2.40, HL 1.56, HW 1.24, EL 0.50, SL 0.70, CI 86, EI 39, SI 53.

Clypeus gently rounded in profile, otherwise slightly longitudinally striate laterally; head uniformly yellowish brown; dorsum of alitrunk without any erect hairs; metapleural gland orifice small, with a bunch of large setae in front of it; petiole low, dorsally truncated; gastral tergites 2 to 4 with erect hairs only on the posterior margin; erect hairs on gastral tergite 1 only; in the anterior face and along the posterior margin; body color bright yellowish brown with posterior parts of tergites black.

Type Material

Holotype: W-MALAYSIA, Perak, Gerik, Lake Temenggor, Belum, 3/1/1994, Joachim Moog, 94-086, ex: Ryparosa fasciculata, alt.: ca 650 m, colony size small, American Museum of Natural History. Paratypes: W-MALAYSIA. Pahang, Fraser’s Hill, 2/22/1994, Joachim Moog, 94-070, ex: Drypetes longifolia, alt.: ca. 850 m, colony size: 660 worker in total, American Museum of Natural History, Forest Research Institute Malaysia, Kepong, The Natural History Museum, and collections of the others.


References based on Global Ant Biodiversity Informatics

  • Pfeiffer M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58