Investigation of attapulgite clay crushing by bionic tooth plates inspired from convex structures on body surface of dung beetles

Eight mite species of the family Macrochelidae (Acari: Gamasida) were collected from the body surface of dung beetles in Baluran National Park, East Java, Indonesia. Of these, one species, Macrocheles subwallacei sp. nov., was describe as new to science. Female of Macrocheles crispa (Berlese, 1910) was rediscribed and the male was described for the first time. The remaining six species were Neopodocinum Â jaspersi (Oudemans, 1900), M. dispar (Berlese, 1910), M. hallidayi Walter & Krantz, 1986, M. entetiensis Hartini & Takaku, 2005, M. jabarensis Hartini & Takaku, 2003 and M. persimilis Hartini, Dwibadra & Takaku, 2007.Key words: Acari, Macrochelidae, dung beetles, Baluran, East Java, Indonesia

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Macrochelid mites (Acari: Gamasida) from Kaimana of West Papua, Indonesia, and endemism of macrochelid mite fauna in New Guinea Island

TREUBIA ◽

10.14203/treubia.v42i0.616 ◽

2015 ◽

Vol 42 ◽

pp. 53

Author(s):

Sri Hartini ◽

Gen Takaku

Keyword(s):

Key Words ◽

Body Surface ◽

New Record ◽

New Guinea ◽

Dung Beetles ◽

Morphological Features ◽

Undescribed Species ◽

West Papua ◽

First Time

As a result of our investigation in Lengguru area, Kaimana, West Papua, Indonesia, 6 species belonging to 2 genera of macrochelid mites(Acari: Gamasida: Macrochelidae) were collected from body surface of dung beetles (Scarabaeidae). Of these, one is undescribed species Macrocheles kaimanaensis sp. nov., and Macrocheles hallidayiWalter & Krantz, 1986is new record from Papua and West Papua (Indonesian parts of New Guinea Island).Male and deutonymph of Holostaspella rosichoni Hartini & Takaku, 2006 originally described from Papua were recorded for the first time. The remaining three species were M. amaliae Hartini, 2008, M. dispar (Berlese, 1910) and M. waigeoensis Hartini, 2008, which were previously collected from Raja Ampat, West Papua, and they are new to location in West Papua. Â Â Â Â Â In total, 18 macrochelid species of 3 genera, including the results of the present study, have been recorded from New Guinea Island. Of these 10 species are endemic to New Guinea Island, and some are also distributed in Australia. So, macrochelid mite fauna of the island is clearly different from Indonesian fauna. Besides, macrochelids in the island tend to have characteristic patterns in some morphological features, e.g., 27 or 29 paris of dorsal setae, dinstinct pilose or plumose dorsal setae, and so on. Key words: Indonesia, Kaimana, Macrochelid mite, New Guinea Island, West Papua

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Three-Dimensional Reconstruction of Native Androctonus Australis Hemocyanin

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100181014 ◽

1990 ◽

Vol 48 (1) ◽

pp. 452-453

Author(s):

Nicolas Boisset ◽

Jean-Christophe Taveau ◽

Jean Lamy ◽

Terence Wagenknecht ◽

Michael Radermacher ◽

...

Keyword(s):

Electron Microscopy ◽

Solid Body ◽

Body Surface ◽

Three Dimensional ◽

Staining Technique ◽

Three Dimensional Reconstruction ◽

Dimensional Reconstruction ◽

View Reconstruction ◽

Surface Representations ◽

Top View

Hemocyanin, the respiratory pigment of the scorpion Androctonus australis is composed of 24 kidney shaped subunits. A model of architecture supported by many indirect arguments has been deduced from electron microscopy (EM) and immuno-EM. To ascertain, the disposition of the subunits within the oligomer, the 24mer was submitted to three-dimensional reconstruction by the method of single-exposure random-conical tilt series.A sample of native hemocyanin, prepared with the double layer negative staining technique, was observed by transmisson electron microscopy under low-dose conditions. Six 3D-reconstructions were carried out indenpendently from top, side and 45°views. The results are composed of solid-body surface representations, and slices extracted from the reconstruction volume.The main two characters of the molecule previously reported by Van Heel and Frank, were constantly found in the solid-body surface representations. These features are the presence of two different faces called flip and flop and a rocking of the molecule around an axis passing through diagonnally opposed hexamers. Furthermore, in the solid-body surface of the top view reconstruction, the positions and orientations of the bridges connecting the half molecules were found in excellent agreement with those predicted by the model.

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