Aretaon (genus)

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Aretaon
Little thorn shrimp (Aretaon asperrimus), pair

Little thorn shrimp ( Aretaon asperrimus ), pair

Systematics
Order : Ghost horror (Phasmatodea)
Partial order : Areolatae
Family : Heteropterygidae
Subfamily : Obriminae
Tribe : Obrimini
Genre : Aretaon
Scientific name
Aretaon
Rehn, JAG & Rehn, JWH , 1939
Male of Aretaon muscosus from Mulu
Males of the Aretaon sp. 'Palawan' means animals from the island of Palawan

The genus Aretaon is a genus of ghosts native to Borneo and the Philippines .

features

The species of the genus Aretaon correspond in habit to typical representatives of the Obrimini and are very similar in appearance to those of the genera Trachyaretaon and Sungaya . Like these, they are wingless in either sex. With a length of approx. 47 to 54 millimeters, the males remain smaller than the females between 72 and 88 millimeters long. In egg-laying adult females, the middle of the abdomen is clearly thickened in height and width and thus almost circular in cross-section. As with the other genera of the Obriminae , a laying spine at the end of the abdomen surrounds the actual ovipositor . It is formed ventrally from the eighth sternite , which is called the subgenital plate or operculum , and dorsally from the eleventh tergum , which is called the supraanal plate or epiproct here . Unlike Trachyaretaon species, they have a pair of distinct spines in the front part of the mesonotum . In the metasternum neither holes nor pits nor perceptible slits can be seen, which are typical for representatives of the genera Brasidas , Euobrimus and Obrimus .

distribution

The representatives of the genus described so far are native to the Malay part of the islands of Borneo . Aretaon asperrimus can be found in the north of the island, in the state of Sabah . In addition, this species is said to also occur on Labuan and on the Philippine island of Luzon , more precisely in Benguet . Aretaeon muscosus is native to the state of Sarawak , located further to the north-west , more precisely in the Gunung Mulu National Park . On the Philippine island of Palawan , animals have been collected that resemble Aretaon asperrimus , but differ from it in particular in terms of color. Their status has not yet been clarified.

Systematics and Etymology

James Abram Garfield Rehn & John WH Rehn established the genus Aretaon in 1939 for two species described by Josef Redtenbacher as Obrimus asperrimus and Obrimus muscosus . The type species of the genus is Aretaon asperrimus . The name "Aretaon" is borrowed from Greek mythology and describes, among other things, a defender of Troy . Since Aretaon muscosus was based on a few very thorny or highly praised nymphs , 47 to 64 mm long , their species status was long controversial. As early as 1935 Klaus Günther considered that these animals could be nymphs of Aretaon asperrimus . However, because of the pronounced thorns on the smaller animals, he considered this to be unlikely. Even Philip Bragg , who had already had the experience that the spines of adult asperrimus Aretaon is reduced significantly, mentioned this possibility in 2001, held a synonymisation but too hastily. It was only in 2004 that Oliver Zompro introduced Aretaeon muscosus as a synonym for Aretaon asperrimus . This made Aretaon a monotypical genus for twelve years . Francis Seow-Choen revalidated the species in 2016 because its types match perfectly with the animals he found from the Gunung Mulu National Park.

So far only the following two types have been described:

Terrariums

Aretaon asperrimus was introduced for terraristics as early as 1992 and 1996 . Both tribes were collected at the Kinabalu . The Phasmid Study Group has the species under PSG number 118.

In 2010 Joachim Bresseel collected a female Aretaon at Mount Gantung on Palawan , from whose abdomen he was able to dissect four eggs. From these hatched a male and a female animal. They formed the basis for a strain that has been in breeding since then, known as Aretaon sp. 'Palawan' is called. Representatives of this tribe are listed under PSG number 329.

In July 2014 Albert Kang collected another species in the Gunung Mulu National Park, which Thierry Heitzmann was able to successfully breed in 2015. The resulting strain is parthenogenic and is called Aretaon sp. 'Mulu' called. The species corresponds both in its appearance and in its place of discovery to the animals identified by Francis Seow-Choen as Aretaeon muscosus .

credentials

  1. ↑ Ingo Fritzsche : Poles - Carausius, Sipyloidea & Co. , Natur und Tier Verlag, Münster 2007, ISBN 978-3-937285-84-9
  2. ↑ Christoph Seiler, Sven Bradler, Rainer Koch: Phasmids - care and breeding of ghost horrors, stick insects and walking leaves in the terrarium . bede, Ruhmannsfelden 2000, ISBN 3-933646-89-8
  3. ↑ Alexander Esch: Poles, ghosts, walking leaves: successful keeping of phasmids . Natur und Tier-Verlag, Münster 2012, pp. 119–121, ISBN 978-3-86659-221-6
  4. ↑ JAG Rehn & JWH Rehn: Proceedings of The Academy of Natural Sciences (Vol. 90, 1938) , Philadelphia 1939, p. 435 ff. ( File version )
  5. ↑ Oliver Zompro : Revision of the genera of the Areolatae, including the status of Timema and Agathemera (Insecta, Phasmatodea) . Goecke & Evers Verlag, Keltern, 2004, pp. 200-214, ISBN 3-931374-39-4
  6. ^ A b c Philip E. Bragg : Phasmids of Borneo , Natural History Publikations (Borneo) Sdn. Bhd., Kota Kinabalu, Sabah, Malaysia, 2001, pp. 103-109, ISBN 983-812-027-8
  7. ^ Rehn, JAG & Rehn, JWH : The Orthoptera of the Philippine Island, Part 1. - Phasmatidae; Obriminae , Proceedings of the Academy of Natural Sciences of Philadelphia, 90, 1938, p. 422
  8. ^ A b Francis Seow-Choen : A Taxonomic Guide to the Stick Insects of Borneo , Natural History Publikations (Borneo) Sdn. Bhd., Kota Kinabalu, Sabah, Malaysia, 2016, pp. 412-414, ISBN 978-983-812-169-9
  9. ↑ a b Holger Dräger: Gepenstschrecken der Familie Heteropterygidae Kirby , 1896 (Phasmatodea) - an overview of previously kept species, part 5: Subfamily Obriminae Brunner von Wattenwyl , 1893, genera Obrimus Stål , 1875 & Aretaon Rehn & Rehn , 1939 , Arthropoda Popularis , 1 (2) 2014, pp. 8-23, ISSN  1866-5896
  10. ↑ Oliver Zompro: Revision of the genera of the Areolatae, including the status of Timema and Agathemera (Insecta, Phasmatodea) . Goecke & Evers Verlag, Keltern, 2004, ISBN 3-931374-39-4
  11. ^ Paul D. Brock , Thies H. Buescher & Edward W. Baker: Phasmida Species File Online . Version 5.0. (accessed on December 29, 2018)
  12. ↑ Phasmid Page. (No longer available online.) Frank H. Hennemann & Oskar V. Conle , archived from the original on May 2, 2011 ; accessed on December 30, 2018 (access only works with login). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.phasmatodea.com
  13. ↑ a b Phasmid Study Group Culture List (English)
  14. ↑ Pictures of Aretaon sp. 'Mulu' on phasma.eu

Web links

Commons : Aretaon  - collection of images, videos and audio files