.jpg){kind=logo}
Zigrasimecia chuyangsui
| †Zigrasimecia chuyangsui Temporal range: Early Cenomanian, Late Cretaceous Burmese amber, Kachin State, Myanmar | |
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Zigrasimeciinae |
| Genus: | Zigrasimecia |
| Species: | †Z. chuyangsui |
| Binomial name | |
| †Zigrasimecia chuyangsui Chaul, 2023 | |
Photo Gallery
Chaul (2023), Fig. 2. Masticatory margin of mandible in Gerontoformica and Zigrasimecia. A, Gerontoformica sp. (ANTWEB1032629); B, Z. ferox (ANTWEB1008126); C, Z. chuyangsui (ANTWEB1032660); D, Z. tonsora (ANTWEB11008098). Black triangles indicate incision between apical and basal teeth (or basal lamella). Image of Z. tonsora by Philip Barden and image of Z. ferox by Vincent Perrichot, courtesy of Antweb.org.
,_Fig._9.jpg)
,_Fig._2.jpg)
Identification
Medium-sized species. Head more inflated than usual for the genus, apparently subround in full-face view. Frontal carinae poorly marked to absent. Body pilosity composed of abundant, filiform, relatively long, and flexuous setae. Dorsal mesosomal outline conspicuously convex, chubby; propodeum without strongly marked corners between the dorsal and posterior surfaces. Petiolar node thick in lateral view, its dorsal surface developed, round.
Among the species that have standing setae on most of the body, Z. chuyangsui can be unmistakably identified for the overall chubby appearance of the body, especially by the shape of the mesosoma, with the lateral, dorsal, and posterior surfaces softly merging into each other, rather than separated by discrete corners and borders.
The tiny ventral, apicoventral, medial, and truncate chaetae seen in the protarsomeres of the holotype of Z. chuyangsui are shared with Camelosphecia, although they are lobate, somewhat hypertrophied in the latter.
Keys including this Species
Distribution
This taxon was described from Burmese amber, Kachin State, Myanmar (Early Cenomanian, Late Cretaceous).
Castes
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- †chuyangsui. †Zigrasimecia chuyangsui Chaul, 2023: 316, figs. 9, 10 (w.) MYANMAR (Burmese Amber, Cretaceous).
Type Material
- Holotype worker (ANTWEB1032660). Hukawng Valley, Kachin Province, Myanmar; Lower Cenomanian (ca.98.79 ± 0.62 Ma) [CELC].
The specimen has little or no distortion or stretching, and the cuticle is not damaged or desiccated, except for a small cut on vertex caused by the specimen preparation. Bubbles around the petiole, a piece of debris at the apical left side of the gaster, and a leaf remain positioned dorsad the metasoma obscure some views of the specimen.