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MichaelGeiser

MichaelGeiser

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MichaelGeiser Tansy Ragwort Flea Beetle
Tansy Ragwort Flea Beetle commented on by MichaelGeiser Jakarta, Indonesiaa year ago

Sorry! The common name often used for species of Aulacophora (especially the orange-ish ones related to A. indica) is "pumpkin beetle" or "red pumpkin beetles". I just got here looking for actual information on those western European Longitarsus species and the identification here was just bizarre!
The beetle on the picture could be Aulacophora indica, I'm just not really sure. This species group is rather difficult and there aren't any known key characters to reliably separate the females (this one is a female, based on how the antennae look like).

MichaelGeiser Leaf Minning Beetle
Leaf Minning Beetle commented on by MichaelGeiser Cape Town, Western Cape, South Africaa year ago

Quite an interesting record! It has to be Balyana sculptilis (Fairmaire, 1895), as this is the only species of the genus in continental Africa (all the rest are endemic to Madagascar). B. sculptilis is recorded from all over eastern Africa, down to southern Mozambique. But I'm not aware of any record from South Africa, and especially not from West Cape! Might have even been an introduction, maybe with some plants? Their host plant is still unknown. Possibly a palm.

MichaelGeiser Net Winged Beetle
Net Winged Beetle commented on by MichaelGeiser Kigoma, Tanzania2 years ago

Please forget about this "subspecies" matojoi!
The author of that paper (who also decided to name it "in honour" of himself didn't quite understand the basics of biological systematics. Lycus trabeatus is a species with strong sexual dimorphism, so the females look quite different from the males. This guy misidentified a male of L. trabeatus as a female and then described the actual female as a different subspecies "matojoi"! They are of course just sexes of a single species and can't possibly be classified as different taxa! Also, because of a mis-application of the rules of zoological nomenclature (lack of understanding what "holotype" actually means), the "subspecies" described in that paper doesn't even fulfill the basic requirements of being an "available" name. So, the name matojoi would even be considered invalid if it was actually belonging to a different subspecies!

MichaelGeiser Unknown spotting
Unknown spotting commented on by MichaelGeiser Papua, Indonesia4 years ago

Well, good luck! :)
There is a key to the New Guinean genera of Galerucinae, but it's meant to be used on preserved specimens and probably doesn't work very well on photos. Also, it was done in the 1980ies, when it was still expensive and laborious to add illustrations in scientific papers (so there are hardly any habitus pictures).
https://archive.org/details/biostor-167
Also, keep in mind that a rather large part of the New Guinean beetle fauna is not even described!

MichaelGeiser Bembidion ground beetle
Bembidion ground beetle commented on by MichaelGeiser Αποκεντρωμένη Διοίκηση Θεσσαλίας - Στερεάς Ελλάδας, Greece4 years ago

Sorry, not a Bembidion at all! This is a tenebrionid of the genus Helops. There are three species recorded from Greece: H. caeruleus, H. rossii and H. glabriventris, all very similar to each other and hard to identify from a photo.
More information in this recent paper here:
https://www.researchgate.net/publication...
(note: they don't treat the Greek subspecies H. caeruleus caeruleus in that paper, but I think the characters would be pretty much the same as for H. caeruleus stevenii, the subspecies found in NE Anatolia)

MichaelGeiser Leaf Beetle
Leaf Beetle commented on by MichaelGeiser Bengaluru, Karnataka, India4 years ago

Chrysochus cobaltinus is a species from western North America (USA and Canada), not found anywhere near India. In tropical Asia, there is the genus Platycorynus, closely related to Chrysochus, distinguished by the shape of the antennae (last five segments flattened and widened in Platycorynus, not so in Chrysochus). There are several blue-metallic species of Platycorynus in India, so I'm not able to tell which one it is exactly.

MichaelGeiser Unknown spotting
Unknown spotting commented on by MichaelGeiser Papua, Indonesia4 years ago

A leaf beetle (Chrysomelidae) of the subfamily Galerucinae. I don't know the exact genus or species.
It definitely isn't a criocerine (Lema or the like), those would have a very different pronotum shape and clearly punctate elytra.

MichaelGeiser Unknown spotting
Unknown spotting commented on by MichaelGeiser Uttarakhand, India4 years ago

There is also this paper here, which contains photos of some of the more common Himalayan leaf beetles (see p. 60 for Meristata):
www.kmnh.jp/wp-content/themes/kmnh_jp/im...
The species of Meristata are relatively easy to recognise by their colour patterns (though there are sometimes variations with reduced spots, that are more difficult to place). The only key available is that by Maulik, 1936 (link given above). There are also the genera Leptarthra and Spitiella that can be mistaken for Merisata in some cases (but not in the case of the M. sexmaculata).

MichaelGeiser "Golden red worm"
"Golden red worm" commented on by MichaelGeiser Uttarakhand, India5 years ago

It should be Agrosteomela indica (Hope, 1831), based on colour pattern (the underside picture is very helpful here!), and body shape. Especially the relatively narrow shape of the pronotum should exclude Chrysomela populi, which has pretty much the same colouration and is also found in the Himalayan parts of India.
The reference I gave above is very old! A. indica is treated on p. 47, as Paralina indica (Paralina is now synonym of Agrosteomela). Unfortunately, there is not much modern literature to identify Indian chrysomelids, and not much in terms of reliably identified photos on the internet (except for a few common pest species).

MichaelGeiser Net-winged Beetle
Net-winged Beetle commented on by MichaelGeiser West Bengal, India5 years ago

It is indeed a Lycidae (net-winged beetle), but the species is not Dictyoptera aurora. It may be a species of Calochromus, but I'm not sure. The species identified on http://www.natureloveyou.sg is misidentified, and probably a species of Lyponia. There are many hundreds of Lycidae species with the same colour pattern in tropical Asia!
It seems like some of the beetle on that Singaporean website were "identified" using a book or website with beetles from Europe, which obviously has a very different fauna.

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