Pylaemenes sepilokensis

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Pylaemenes sepilokensis
Pylaemenes sepilokensis sepilokensis, male.jpg
Pylaemenes sepilokensis sepilokensis
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Phasmatodea
Superfamily: Bacilloidea
Family: Heteropterygidae
Subfamily: Dataminae
Genus: Pylaemenes
Species:
P. sepilokensis
Binomial name
Pylaemenes sepilokensis
(Bragg, 1998)
Subspecies [1]
  • Pylaemenes sepilokensis sepilokensis(Bragg, 1998)
  • Pylaemenes sepilokensis kinabaluensis Seow-Choen, 2016
Synonyms [1]
  • Datames borneensis sepilokensisBragg, 1998
  • Pylaemenes borneensis sepilokensis(Bragg, 1998)
Pylaemenes s. sepilokensis Pylaemenes sepilokensis Sepilok - female at Epipremnum.jpg
Pylaemenes s. sepilokensis

Pylaemenes sepilokensis is a species of stick insects (Phasmatodea) that is found in Borneo, more precisely in the Malay state of Sabah.

Contents

Description

The females reach a length of 45 to 48 millimetres (1.8 to 1.9 in) in the nominate subspecies. The males are 39 to 45 millimetres (1.5 to 1.8 in) long. Both sexes have orange eyes and a brown non-shiny coloration, slightly darker in males. This coloring and the strongly structured body surface ensure a phytomimesis in which the animals resemble the bark of trees. [2] [3] [4]

The subspecies Pylaemenes sepilokensis kinabaluensis remains somewhat smaller. It is only 36.5 millimetres (1.44 in) long in males and 41 millimetres (1.6 in) in females. The animals differ from Pylaemenes sepilokensis sepilokensis by the mesonotum, which clearly tapers backwards. In the female it is 6.5 millimetres (0.26 in) wide in front and 5.5 millimetres (0.22 in) behind. In the male it tapers from 5.5 to 3.5 millimetres (0.22 to 0.14 in). Otherwise, the subspecies is morphologically similar to the nominate subspecies. [5]

Distribution area and reproduction

Pylaemenes sepilokensis has been found at various locations in Sandakan District, mostly in the Sepilok Forest Reserve. [2] The subspecies Pylaemenes sepilokensis kinabaluensis was found in Kinabalu National Park on the edge of the road to Mount Kinabalu near the park headquarters. The species feeds on leaves of various Araceae, on Curculigo and Pandanus species. [5]

The nocturnal animals hide during the day and usually react when disturbed by apparent death. The females lay one, more rarely two, eggs per week. These are brown, 3.5 millimetres (0.14 in) long and 2.5 millimetres (0.098 in) wide. Its surface is covered with approx. 0.5 millimetres (0.020 in) long hairs with a double hook at the end. After about 14 to 18 weeks, the nymphs, which are initially very light and about 11 millimetres (0.43 in) long, begin to hatch at night. As they grow, they often show shades of green in the otherwise light beige base coloration. It takes five to six months for males and six to eight months for females to become adults. [4]

Taxonomy

The species was described in 1998 by Philip E. Bragg as one of three subspecies of Datames borneensis. A female collected near Sandakan on June 29, 1927, was selected as the holotype. It was already in the F.M.S. Museum and was transferred to today's Naturalis Biodiversity Center in Leiden. Paratypes are two females and three males originating from the Sepilok Forest Reserve. The females were collected in September 1982 by C.L. Chan and are in his private collection together with one male paratype each collected in 1992 and 1994. The third male, also collected in 1994, is in the private collection of Francis Seow-Choen. Both the original species and the subspecies name refer to the locality. [2] [3]

Frank H. Hennemann synonymized the genus Datames with Pylaemenes in 1998 and includes only Pylaemenes coronatus , Pylaemenes oileus and Pylaemenes pusillus (now Planispectrum pusillum ). [6] Since the corresponding work appeared only a few days after the publication of Bragg's description, the three subspecies of Datames borneensis, among other things, have not yet been considered here. Pylaemenes borneensis sepilokensis and the other two subspecies were first mentioned in 2004 as representatives of this genus. [7]

Seow-Choen elevated all three subspecies to species status in 2016. At the same time, he described Pylaemenes sepilokensis kinabaluensis, as a subspecies for the nominate form of Pylaemenes sepilokensis. Both the male holotype and female paratype were collected by Seow-Choen and Olivia Seow Wen in Kinabalu National Park in September 2011. Both types are deposited in the Sabah Parks Natural History Museum, also referred to as the "Kinabalu Park Museum", located at the Kinabalu National Park Headquarters. [1] [3]

In a molecular genetic study published in 2021, two samples referred to as Pylaemenes sepilokensis from different localities in Sabah, namely Sepilok and Tawau, were determined to be non-conspecific. According to this, the strain collected in Tawau must be another undescribed species. [8]

In terraristics

Pylaemenes sepilokensis was first collected for terraristics by Mark Bushell in the summer of 2001 in Borneo, more precisely near Sepilok, and brought to Europe. The species received the PSG number 245 from the Phasmid Study Group. After it had disappeared in the meantime, it has been bred again since 2015 after further imports by Ian Abercrombie. [4] [9] In addition to a breeding stock from Sepilok, there is another from Tawau, which has also been referred to as Pylaemenes sepilokensis, but must be assigned to a separate species. [8] In contrast to most other Datamini, hazel, bramble or other Rosaceae are not suitable as fodder plants in the long term. On the other hand, the species, like its closer relatives, can be kept and bred well with Epipremnum , Philodendron or Dieffenbachia species. [9]

Related Research Articles

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<i>Pylaemenes</i> (insect) Genus of stick insects

Pylaemenes is a genus of stick insects in the family Heteropterygidae and subfamily Dataminae. It combines small to medium-sized, often brightly colored Phasmatodea species. Their representatives are found in large parts of Southeast Asia.

<i>Orestes</i> (insect) Genus of stick insects

The genus Orestes combines relatively small and elongated Phasmatodea species from Southeast and East Asia.

<span class="mw-page-title-main">Datamini</span> Tribe of stick insects

Datamini is the only tribe within the subfamily of the Dataminae from the order of the Phasmatodea. The representatives of this subfamily are on average not as large as those of the other two subfamilies belonging to the family of Heteropterygidae.

<i>Epidares</i> Species of stick insect

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<i>Dares</i> (insect) Genus of stick insects

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<i>Planispectrum</i> Genus of stick insects

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<i>Hoploclonia</i> Tribe of stick insects

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<i>Haaniella</i> Genus of stick insects

Haaniella is a genus of the Phasmatodea family Heteropterygidae from Southeast Asia.

<i>Aretaon asperrimus</i> Species of stick insect

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<i>Orestes mouhotii</i> Species of stick insect

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<i>Orestes japonicus</i> Species of stick insect

Orestes japonicus, a stick insect, is a representative of the genus Orestes.

<i>Pylaemenes elenamikhailorum</i> Species of stick insect

Pylaemenes elenamikhailorum is a species of stick insects native in Sepilok on Borneo. In application of the more recent differentiation between the genera Pylaemenes and Orestes the species is sometimes also called Orestes elenamikhailorum.

<i>Dares verrucosus</i> Species of stick insect

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<i>Hoploclonia cuspidata</i> Species of stick insect

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<i>Hoploclonia abercrombiei</i> Species of stick insect

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<i>Haaniella gintingi</i> Species of stick insect

Haaniella gintingi is a stick insect species from Sumatra. It is a typical representative of the subfamily Heteropteryginae. The occasionally used common name Ginting’s Haaniella refers to the species name.

<i>Haaniella parva</i> Species of stick insect

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<i>Pylaemenes mitratus</i> Species of stick insect

Pylaemenes mitratus is a species of stick insects (Phasmatodea) native to Malay Peninsula and Sumatra. The species is also known by the common name Money Plant Stick Insect, which refers to the most well-known food plants, Epipremnum aureum, which is also known as money plant.

References

  1. 1 2 3 Brock, P. D.; Büscher, T. H. & Baker, E. W. Phasmida Species File Online . Version 5.0. (accessdate 4 January 2023)
  2. 1 2 3 Bragg, P. E. (1998). A revision of the Heteropteryginae (Insecta: Phasmida: Bacillidae) of Borneo, with the description of a new genus and ten new species, Zoologische Verhandelingen, Leiden 316, pp. 70–74, figs 107 & 110. ISSN   0024-1652/ISBN 90-73239-61-3, Online-Version
  3. 1 2 3 Bragg, P. E. (2001). Phasmids of Borneo, Natural History Publikations (Borneo) Sdn. Bhd., Kota Kinabalu, Sabah, Malaysia, pp. 162—169, ISBN 983-812-027-8
  4. 1 2 3 Pylaemenes at Phasmatodea.com by Conle, O. V.; Hennemann, F. H.; Kneubühler, B. & Valero, P.
  5. 1 2 Seow-Choen, F. (2016). A Taxonomic Guide to the Stick Insects of Borneo, Natural History Publikations (Borneo) Sdn. Bhd., Kota Kinabalu, Sabah, Malaysia, pp. 399—403, ISBN 978-983-812-169-9
  6. Hennemann, F. H. (1998). Ein Beitrag zur Kenntnis der Phasmidenfauna von Sulawesi. Mitteilungen des Museums für Naturkunde, Berlin, Zoologische Reihe 74, pp. 125—126
  7. Zompro, O. (2004). Revision of the genera of the Areolatae, including the status of Timema and Agathemera (Insecta, Phasmatodea), Goecke & Evers, Keltern-Weiler, pp. 225–226, ISBN 978-3-931374-39-6
  8. 1 2 Bank, S.; Buckley, T. R.; Büscher, T. H.; Bresseel, J.; Constant, J.; de Haan, M.; Dittmar, D.; Dräger, H.; Kahar, R. S.; Kang, A.; Kneubühler, B.; Langton-Myers, S. & Bradler, S. (2021). Reconstructing the nonadaptive radiation of an ancient lineage of ground-dwelling stick insects (Phasmatodea: Heteropterygidae) , Systematic Entomology, DOI: 10.1111/syen.12472
  9. 1 2 Phasmid Study Group Culture List