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Overbeckia
| Overbeckia | |
|---|---|
| |
| Overbeckia subclavata | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Hymenoptera |
| Family: | Formicidae |
| Subfamily: | Formicinae |
| Tribe: | Camponotini |
| Genus: | Overbeckia Viehmeyer, 1916 |
| Type species | |
| Overbeckia subclavata | |
| Diversity | |
| 3 species (Species Checklist, Species by Country)
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The types of the only species of the genus, Overbeckia subclavata, were reported as being collected from nests in hollow bamboo and the hollow branches of a mango tree.
Identification
The short sub-quadrate antenna combined with a sub-truncate head (similar to Colobopsis) are important diagnostic features for this monotypic genus. Their resemblance to Camponotus (which included Colobopsis at that time) led Bolton (2003) to suggest revisionary work will lead to Overbeckia becoming a junior synonym of that diverse genus.
General & Alpert (2012) note that the only known species within this genus has an antenna that gradually widens to a relatively broad terminal segment, and has a mesosoma that is flat and pinched at the metapleural spiracles.
Heterick (2019) expanded this diagnosis with the following: Overbeckia has generally been distinguished from other formicines by the incrassate appearance of the distal portion of the antennal funiculus, although this feature is subtle and not particularly accentuated, and the short sepals of the calyx of the proventriculus (this latter character requires the ant to be dissected). The metapleural gland is vestigial and is indicated by a fine transverse ridge terminating in a very small thin, vertical slit overhung by three or four guard hairs, and is probably not functional. The Overbeckia worker also lacks a thin, median, longitudinal depression between the frontal carinae (B. Heterick, unpubl.). This separates it from the Camponotus worker and workers of most species in Colobopsis of similar appearance. The worker and the queen possess a five-toothed mandible. These characters, combined, will identify a worker as Overbeckia.
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See images of species within this genus |
Distribution
Only known from Singapore.
Distribution and Richness based on AntMaps
Species by Region
Number of species within biogeographic regions, along with the total number of species for each region.
| Afrotropical Region | Australasian Region | Indo-Australian Region | Malagasy Region | Nearctic Region | Neotropical Region | Oriental Region | Palaearctic Region | |
|---|---|---|---|---|---|---|---|---|
| Species | 0 | 1 | 3 | 0 | 0 | 0 | 0 | 0 |
| Total Species | 2841 | 1736 | 3045 | 932 | 835 | 4379 | 1741 | 2862 |
Biology
Morphology
Worker Morphology
Explore: Show all Worker Morphology data or Search these data. See also a list of all data tables or learn how data is managed.
- Antennal segment count: 12
- Antennal club: gradual
- Palp formula: 6,4
- Scrobes: absent
- Sting: absent
Phylogeny
| Formicinae |
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See Phylogeny of Formicinae for details.
Nomenclature
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- OVERBECKIA [Formicinae: Camponotini]
- Overbeckia Viehmeyer, 1916a: 151. Type-species: Overbeckia subclavata, by monotypy.
Unless otherwise noted the text for the remainder of this section is reported from the publication that includes the original description.
Description
Worker
Fuhler 12-gliedrig, Einlenkung vorn Hinterrande des Clypeus abgeruckt, GeiBel gegen das Ende verdickt, die vorletzten Glieder schwach quer. Stirnleisten schwach geschweift, nach ruckwarts divergierend, Stirnfeld dreieckig. Vorderkopf etwas abgestutzt, Clypeul schwach konvex, Clypeal und Antennalgrube getrennt, Mandibeln dreieckig und gezahnt ; Kiefertaster 6-gliedrig, das 1. Glied sehr klein; Lippentaster 4-gliedrig. Augen in der Mitte der Kopfseiten, Punktaugen fehlen. Thorax ahnlich Calomyrmex, oben ziemlich flach, mit deutlicher Promesonotal und feiner Mesoepinotalsutur, an dem Epinotum seitlich eingeschnurt, Pronotum vorn und Meso und Epinotum seitlich gerandet. Petiolus mit senkrechter Schuppe. Pumpmagen wie bei Prenolepis longicornis, mit kurzen, schwach gebogenen Kelchblattern. Kein Dimorphisrnus.
Queen
Wie der (worker symbol) Schuppe des.Petiolus niedriger und dicker, Epinoturn seitlich nicht gerandet, Epinotumwinkel gerundet rechtwinklig. Flugelgeader wie bei Camponotus, mit langgestreckter Cubital und geschlossener Radialzelle, aber ohne Discoidalzelle. Drei Punktaugen.
Male
Kopf hinter den Augen halbkreisformmig, mit den Augen etwa so breit als ohne die Mandibeln lang. Fiihler 13-gliedrig, mit langem Scapus, aIle GeiBelglieder etwas langer als breit; Kieferund Lippentaster wie beim (worker symbol); Mandibeln mit ungezahntem Kaurande. Schuppe niedrig und dick. AuBere Genitalanhange kurz, auBere Klappen nicht dornformig.
Pupa
Puppen bedeckt.
Etymology
This genus was named after Hans Friedrich Overbeck in honor of his contributions to myrmecology. Viehmeyer noted that Overbeck had meticulously studied, packaged, shipped and made notes about a large number of ant species that formed the subject matter of his paper "Ameison von Singapore." Viehmeyer then notes that these research efforts were halted by WWI and he both praises and thanks Overbeck for his work.
References
- General, D.M. & Alpert, G.D. 2012. A synoptic review of the ant genera of the Philippines. ZooKeys 200: 1-111.
- Bolton, B. 2003. Synopsis and Classification of Formicidae. Mem. Am. Entomol. Inst. 71: 370pp (page 122, Overbeckia in Formicinae, Camponotini)
- Cantone S. 2018. Winged Ants, The queen. Dichotomous key to genera of winged female ants in the World. The Wings of Ants: morphological and systematic relationships (self-published).
- Emery, C. 1925d. Hymenoptera. Fam. Formicidae. Subfam. Formicinae. Genera Insectorum 183: 1-302 (page 59, Overbeckia in Formicinae, Camponotini)
- Forel, A. 1917. Cadre synoptique actuel de la faune universelle des fourmis. Bull. Soc. Vaudoise Sci. Nat. 51: 229-253 (page 251, Overbeckia in Camponotinae, Camponotini)
- Heterick, B.E. 2019. First record of the formicine genus Overbeckia (Hymenoptera: Formicidae) from Australia. Myrmecological News 29: 163-166 (doi:10.25849/myrmecol.news_029:163).
- Klimeš, P., Drescher, J., Buchori, D., Hidayat, P., Nazarreta, R., Potocký, P., Rimandai, M., Scheu, S., Matos-Maraví, P. 2022. Uncovering cryptic diversity in the enigmatic ant genus Overbeckia and insights into the phylogeny of Camponotini (Hymenoptera:Formicidae:Formicinae). Invertebrate Systematics, 36(6), 557-579 (doi:10.1071/is21067).
- Viehmeyer, H. 1916a [1915]. Ameisen von Singapore. Beobachtet und gesammelt von H. Overbeck. Arch. Naturgesch. (A) 81(8): 108-168 (page 151, Overbeckia as genus)
- Wheeler, W. M. 1922i. Ants of the American Museum Congo expedition. A contribution to the myrmecology of Africa. VII. Keys to the genera and subgenera of ants. Bull. Am. Mus. Nat. Hist. 45: 631-710 (page 700, Overbeckia in Formicinae, Camponotini)