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Zigrasimecia boudinoti
| †Zigrasimecia boudinoti Temporal range: Early Cenomanian, Late Cretaceous Burmese amber, Kachin State, Myanmar | |
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| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Zigrasimeciinae |
| Genus: | Zigrasimecia |
| Species: | †Z. boudinoti |
| Binomial name | |
| †Zigrasimecia boudinoti Chaul, 2023 | |
Photo Gallery
Chaul (2023), Fig. 6. Holotype of Zigrasimecia boudinoti (ANTWEB1032623). A, full-face view of the head; B, profile view of left side of body; C, right portion of anterior head, evincing clypeal lobe, and clypeal, mandibular and labral chaetae; D, profile of the right side of mesosoma with metanotal and propodeal spiracles indicated (mtsp and propsp) and propodeal spiracle magnified on the bottom right corner (under epifluorescence light); E, profile of right side of the head; F, dorsal view of the body. Scale bars are 0.2 mm in A, B, and F and 0.1 mm in C and E. Abbreviations: Umspl, upper mesopleuron; Lmspl, lower mesopleuron; Lmtpl, lower metapleuron; MesL, mesosoma length.
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Identification
Large species. Head roughly subrectangular (longer than wide) in full-face view. Body pilosity composed of abundant, relatively long, flexuous or erect, filiform setae. Dorsal mesosomal outline mildly convex; propodeum dorsal and posterior surfaces distinct, but not separated from one another by a strongly marked corner. In dorsal view, propodeal posterior margin pronounced laterally (medially concave). Petiolar node apex sharp, not forming a dorsal surface; tranversally the apex is bilobed.
This species is, together with Zigrasimecia hoelldobleri, the largest in the genus (both being larger than the species known by queens, Fig. 14). Zigrasimecia boudinoti cannot be confused with Z. hoelldobleri by the radically different body setation. It shares the same type of setae as Zigrasimecia chuyangsui, but the latter has a chubbier appearance, with a more compact and evenly curved mesosoma, and a round petiolar node apex rather than a thin bilobed one.
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.
- †boudinoti. †Zigrasimecia boudinoti Chaul, 2023: 311, fig. 6 (w.) MYANMAR (Burmese Amber, Cretaceous).
Type Material
- Holotype worker (ANTWEB1032623). Hukawng Valley, Kachin Province, Myanmar; Lower Cenomanian (ca.98.79 ± 0.62 Ma) [CELC].
The specimen is superbly preserved, but the surrounding amber matrix is considerably dirt, which prevents the visualization of some features. There are mild distortions on the petiole anteriorly, where it articulates with the mesosoma, and posteriorly, where it articulates with A3; the node itself appears intact.