Dinoponera ist eine Gattung der Ameisen (Formicidae) aus der Unterfamilie der Urameisen (Ponerinae).
Der Körper aller Ameisen aus dieser Gattung ist überwiegend dunkelbraun bis schwarz. Das Kopfschild (Clypeus) ist in der Mitte keilförmig ausgespart. Seitlich der Einbuchtung befindet sich an der Vorderkante des Clypeus je ein abstehender Zahn.[1]
Alle Arten dieser Gattung sind sehr groß und einige gehören mit über drei Zentimetern Körperlänge zu den größten Ameisen der Welt. Es gibt keine morphologische Königinnenkaste, die Fortpflanzung wird von einer oder mehreren begatteten Arbeiterinnen (Gamergaten) übernommen.[2]
Dinoponera besitzen das Nervengift Poneratoxin, welches Insekten lähmt und für Menschen als äußerst schmerzhaft gilt.[3][4][5]
Früher wurde diese Gattung als Schwestergruppe von Paraponera verstanden, mit der sie viele morphologische Gemeinsamkeiten aufweist. Paraponera ist aber nach heutigen genetischen Befunden nicht näher mit den Urameisen verwandt und bildet eine eigene Unterfamilie Paraponerinae.[6][3]
Die acht Arten[7] sind ausschließlich in der Neotropis heimisch. Sie besiedeln feuchtere Savannengebiete und Regenwälder.[2]
Die unterirdisch angelegten Erdnester bestehen meist aus höchstens 100 Individuen, bei manchen Arten auch nur aus etwa 30. Kolonieneugründungen erfolgen stets durch Abspaltung. Der Großteil der adulten Tiere bezieht dabei mit einem Teil der Brut ein neues Nest. Die initiierenden Ameisen rekrutieren weitere Arbeiterinnen mit Hilfe taktiler Kommunikation zum Tandemlauf. Weitere Mitglieder der alten Kolonie werden auch getragen. Aus der zurückgelassenen Brut entstehen Geschlechtstiere, so dass auch die alte Kolonie weiterexistieren kann.[2]
Die Tiere ernähren sich ausschließlich zoophag. Sie jagen alleine und rekrutieren keine Nestgenossinnen zur Nahrungssuche.
Folgende Arten (und Unterarten) bilden die Gattung Dinoponera:[8]
Dinoponera ist eine Gattung der Ameisen (Formicidae) aus der Unterfamilie der Urameisen (Ponerinae).
Дөөдинопонера (лат. Dinoponera) — кумурскалардын бир уруусу.
Dinoponera is a strictly South American genus of ant in the subfamily Ponerinae, commonly called tocandiras or giant Amazonian ants.[2] These ants are generally less well known than Paraponera clavata, the bullet ant, yet Dinoponera females may surpass 3–4 cm (1.2–1.6 in) in total body length, making them among the largest ants in the world.
Dinoponera (tocandira ants) are known as piata in many Tucanoan languages.[3]
Dinoponera is a strictly South American genus, and has been found from montane rainforest on the eastern slope of the Andes in Peru, Ecuador and Colombia to savannah and lowland rainforest in Brazil, Guyana, south through Bolivia, Paraguay and Argentina.[2] Dinoponera australis, known from Bolivia, Brazil, Paraguay and Argentina, has the widest known range of all Dinoponera species.[4]
Dinoponera contains one of the largest species of ants in the world, with female Dinoponera gigantea specimens measuring 3–4 cm (1.2–1.6 in) in length.[5] Size is the most obvious character distinguishing Dinoponera from other genera. The only other ants with a worker caste approaching this size are Paraponera clavata (the bullet ant) and the larger Pachycondyla such as P. crassinoda, P. impressa and P. villosa. Paraponera clavata is easily separated by its anvil-shaped petiole with a spine on the ventral surface, highly sculptured body and deep antennal scrobes. Pachycondyla is regarded as the sister taxa to Dinoponera. Dinoponera, in addition to their size, are distinguishable from Pachycondyla by the presence of two laterally projecting clypeal teeth and rows of spines on the pygidium and hypopygidium.[6]
Dinoponera is one of the roughly 10 ponerine genera in which some species have secondarily lost the typical morphologically specialized queen caste for a reproductive worker known as a gamergate. Conflict over dominance is intense in colonies with younger workers usually joining a linear hierarchy of one to five workers depending on colony size. The gamergate, or alpha female has the highest ranking. The alpha female mates with non-nestmate males at night at the entrance of the nest.[7] After copulation the female bites through the male's gaster to release herself and pulls out the genital capsule which acts as a temporary sperm plug. After mating the female is unreceptive to other males and remains monandrous.[8] The gamergate maintains dominance with ritualized behaviors such as antennal boxing and biting, "blocking", as well as gaster rubbing and curling.[9]
Alpha females may "sting smear" a competing female with secretions from the Dufour's gland, triggering the lower ranking workers to immobilize the marked female. Subordinate females (beta, gamma, or delta) may produce unfertilized eggs but these are usually consumed by the alpha female in a form of "queen policing".[9]
Males are born throughout most of the year in tropical species, however Dinoponera australis which lives in the more temperate south was found to only produce males in May–July. When the alpha declines reproductively or dies, she is replaced by a high-ranking worker.[10]
Workers lower in the hierarchy forage individually for food items on the substrate and do not recruit other nestmates to assist with food transport.[5] Although foraging workers do not recruit nestmates, Nascimento et al. (2012) found a positive feedback between incoming food and stimulation of new foragers as well as task partitioning once food was brought into the nest. Lower ranking females processed protein resources while higher ranking females handled small food pieces and distributed them to the larvae. Fourcassié & Oliviera (2002) found Dinoponera gigantea foraging to be concentrated in the early morning and afternoon but did not sample at night. Morgan (1993) observed the highest activity at night in Dinoponera longipes. Dinoponera quadriceps has a marked seasonal pattern in activity. It is most active in May–August, the late rainy season to early dry season in the semiarid Caatinga. Activity was strongly negatively correlated to temperature and positively correlated to prey abundance. The diets of both Dinoponera gigantea and Dinoponera quadriceps have been shown to be predominantly scavenged invertebrates, but include live prey, seeds and fruits. Araújo & Rodrigues (2006) state that the taxonomic diversity of prey is comparable to other tropical ponerines, but has an optimal prey size of 2–3 cm in Dinoponera. Diet seems to be very similar across the genus, regardless of habitat.[11]
Despite their large size and strong venom, Dinoponera are likely preyed on by many vertebrate and invertebrate species across South America. Like many other ant species, Dinoponera can be infected by the entomopathogenic fungi Cordyceps sp.[12] Buys et al. (2010) discovered a Kapala sp. eucharitid wasp emerging from the puparia of Dinoponera lucida.[13]
For subduing large live prey and defense, workers possess a sting that has been known to cause severe pain lasting up to 48 hours. Lymphadenopathy, edema, tachycardia and fresh blood appearing in human victim feces are common symptoms.[14] In some the venom sac is empty. Workers may have 60–75 unique proteinaceous components in the venom. The convoluted gland within the venom system of Dinoponera australis has been found to possess close similarities to those of vespine wasps. The contents of Dinoponera australis venom have been found to be similar to those of Pachycondyla spp. Due to the high diversity of compounds and systemic effects, venom of Dinoponera could be of use to the pharmaceutical industry. For instance, Sousa et al. (2012) demonstrated in mice that venom from Dinoponera quadriceps had antinociceptive properties. The authors note that the local population of northeast Brazil uses dry crushed Dinoponera quadriceps ants to treat earaches, and the stings of live ants are administered for back pain and rheumatism.[13]
Colonies vary in size depending upon species, but generally consist of fewer than 100 individuals.[15] Dinoponera australis colonies have an average of 14 workers (range 3–37), Dinoponera gigantea average 41 workers (range 30–96) and Dinoponera quadriceps has the largest colonies with an average of 80 workers (range 26–238).[16]
New colonies are founded by fission, a process in which a beta female is fertilized in the natal nest.[7] This new alpha female then leaves the nest with a cohort of workers to found an incipient colony, sometimes employing tandem running.[9]
The nest consists of large chambers and tunnels in the soil possibly with an earthen mound and can be 0.10–1.2 m deep. Nests are deeper in Dinoponera australis and Dinoponera quadriceps than in Dinoponera gigantea, Monnin et al. (2003) suggests that deeper nests are a possible adaptation to seasons and aridity. Dinoponera gigantea nests may have up to eight entrances and can be weakly polydomous,[17] whereas 1–30 openings with an average of 11 were recorded for Dinoponera longipes. Nesting density and spatial distribution varies depending on habitat. Density ranges from 15–40 nests per ha to 80 nests per ha. Morgan (1993) measured a spacing between nests for Dinoponera longipes with a median of 35 m (n=22, range 14–69.5 m). Dinoponera australis and Dinoponera gigantea usually nest at the base of trees. Observations of Dinoponera quadriceps nests show that in more arid Caatinga and Cerrado habitats, nests are predominantly constructed under trees, whereas in Atlantic forest 60% of nests were 3 m away from any tree.[16]
This article incorporates text from a scholarly publication published under a copyright license that allows anyone to reuse, revise, remix and redistribute the materials in any form for any purpose: Lenhart P, Dash ST, MacKay WP (2013), "A revision of the giant Amazonian ants of the genus Dinoponera (Hymenoptera, Formicidae)", Journal of Hymenoptera Research, 31: 119–164, doi:10.3897/JHR.31.4335 Please check the source for the exact licensing terms.Dinoponera is a strictly South American genus of ant in the subfamily Ponerinae, commonly called tocandiras or giant Amazonian ants. These ants are generally less well known than Paraponera clavata, the bullet ant, yet Dinoponera females may surpass 3–4 cm (1.2–1.6 in) in total body length, making them among the largest ants in the world.
Le genre Dinoponera regroupe des insectes de la famille des Formicidae, sous-famille des Ponerinae, et de la tribu des Ponerini. Ce sont les plus grandes fourmis au monde, les femelles pouvant mesurer 3 à 4 cm de long.
Le genre Dinoponera a été décrit par l'entomologiste allemand Julius Roger, en 1861.
Le genre Dinoponera regroupe des insectes de la famille des Formicidae, sous-famille des Ponerinae, et de la tribu des Ponerini. Ce sont les plus grandes fourmis au monde, les femelles pouvant mesurer 3 à 4 cm de long.
Dinoponera is een geslacht van mieren uit de onderfamilie van de Ponerinae.
Dinoponera is een geslacht van mieren uit de onderfamilie van de Ponerinae.
Dinoponera é um gênero de insetos, pertencente a família Formicidae.[1]
Dinoponera é um gênero de insetos, pertencente a família Formicidae.
Dinoponera là một chi kiến Nam Mỹ thuộc phân họ Ponerinae.[1] Những loài kiến này ít nổi danh hơn Paraponera clavata, nhưng vẫn đáng chú ý bởi kích thước lớn: Dinoponera gigantea cái có khi dài trên 3–4 cm (1,2–1,6 in).
Các loài Dinoponera chỉ sống ở Nam Mỹ, cư ngụ trong rừng mưa miền núi sườn đông Andes của Peru, Ecuador và Colombia, và xavab cùng rừng mưa đất thấp tại Brasil, Guyana, về phía nam đến cả Bolivia, Paraguay và Argentina.[1] Dinoponera australis, sống ở Bolivia, Brasil, Paraguay và Argentina, là loài có phân bố rộng nhất.[2]
Dinoponera gồm một trong những loài kiến to nhất thế giới: Dinoponera gigantea, con cái loài này dài tới 3–4 cm (1,2–1,6 in).[3] Kích thước là điểm tách Dinoponera khỏi những chi kiến khác. Những loài kiến khác có kiến thợ đạt kích thước xêm xêm là Paraponera clavata và một ít loài Pachycondyla như P. crassinoda, P. impressa và P. villosa.
Dinoponera là một chi kiến Nam Mỹ thuộc phân họ Ponerinae. Những loài kiến này ít nổi danh hơn Paraponera clavata, nhưng vẫn đáng chú ý bởi kích thước lớn: Dinoponera gigantea cái có khi dài trên 3–4 cm (1,2–1,6 in).
Dinoponera (лат. , от др.-греч. δεινός «ужасный» и Ponera) — род самых крупных муравьёв (Formicidae) из подсемейства Ponerinae[1].
Крупные муравьи (длина около 2—3 см) чёрного цвета, гнездящиеся в почве. В яде вида Dinoponera australis (Бразилия) обнаружена новая группа пептидов — Динопонеротоксины (Dinoponeratoxins) и несколько других уникальных компонентов (Johnson & al., 2010)[2].
Геном вида Dinoponera australis: 0,57 пг (C value)[3][4]. Диплоидный набор хромосом 2n = 106, 116, 118, 120[5].
6 видов[1].
Dinoponera (лат. , от др.-греч. δεινός «ужасный» и Ponera) — род самых крупных муравьёв (Formicidae) из подсемейства Ponerinae.
