Nothing is known about the biology of Cardiocondyla nana.
Seifert (2003) - A member of the Cardiocondyla wroughtonii group. Cardiocondyla nana is a species with unique combination of extremely small size, short head, long scape, long spines, very sparse pubescence, peculiar type of microsculpture, and characteristic shape of petiole and postpetiolar sternite.
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The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.
- nana. Cardiocondyla nana Seifert, 2003a: 276, fig. 54 (w.) BORNEO.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Smallest known Cardiocondyla species, CS 366. Head extremely short, CL/CW 1.069. Scape rather long, SL/CS 0.818. Postocular index large, PoOc/CL 0.464. Eyes without any micro setae and small, EYE 0.220. Median third of anterior clypeal margin deeply, median third of occipital margin slightly concave. Frontal carinae immediately caudal of FRS level slightly diverging, FRS/CS 0.266. Anterior clypeus smooth, not shining. Frontal laminae and anteromedian vertex with weak microsculpture, consisting of an irregular mixture of corrugated, foveolate, and carinulate elements. Paramedian and lateral areas of vertex with a unique sculpture: densely-arranged, deeply impressed, and flat-bottomed foveae of 19-23 mm diameter show a well-demarcated central ring of 8-9 mm diameter which is connected with the outer ring through 2-4 very fine microcarinulae (frequently in a characteristic 90° crosswire arrangement, in other foveae the number of microcarinulae may be reduced below 2). Whole lateral area of mesosoma, anterior area of pronotum, and dorsal area of propodeum strongly microreticulate; dorsal area of promesonotum similarly foveate as paramedian vertex. Longitudinal sculpture on whole mesosoma, including metapleural gland bulla, completely absent. Petiole strongly microreticulate, postpetiole shining, very finely microreticulate. Spines long and thin, in profile deviating from longitudinal mesosomal axis by 45°. Metanotal groove deep. Petiole in profile with almost linear (only slightly concave) anterior face and semicircular dorsum. Anterior postpetiolar sternite instead of corners with a strong, curved carina on each side; in frontal view, anterior sternite thus appearing deeply concave. Petiole in dorsal view with rather slender peduncle and almost globular node, which is slightly longer than wide. Postpetiole in dorsal view with a concave anterior margin and convex sides. Surface of 1st gaster tergite shining, with sparser pubescence than in other members of Cardiocondyla wroughtonii group. All body parts light-yellowish.
Holotype worker labelled “BRUNEI: Ulu Temburong L.P.-283.m.T. 22.ii.82.MC.Day The Natural History Museum London.
- Seifert, B. 2003. The ant genus Cardiocondyla (Insecta: Hymenoptera: Formicidae) - a taxonomic revision of the C. elegans, C. bulgarica, C. batesii, C. nuda, C. shuckardi, C. stambuloffii, C. wroughtonii, C. emeryi, and C. minutior species groups. Annalen des Naturhistorischen Museums in Wien Serie B Botanik und Zoologie. 104:203-338. (page 276, fig. 54 worker described)