Friday mystery object #298 answer

Last week I gave you this bony mystery object to identify:

mystery298

There was a request for a side view from jennifermacaire, so here you go:

mystery298b

The suggestions were all suitably cryptic, with some nice puns thrown in for good measure, but the gist of all of them was clear that this is the sternum of a bird. After that point, the suggestions started getting a bit more varied, including reference to marine birds.

Responses on Twitter were a bit more varied, ranging from ‘part of a human face’ to an essentially correct answer (admittedly after a bit of Q&A).

If you’re a regular reader you may recall that I featured a sternum a few months ago from the Grant Museum of Zoology, that had a disappointing answer, but nonetheless an answer that provided a number of sternum images that may have helped with this object.

In particular this specimen may have helped:

wp-1480627910740.jpg

Chicken

The long lateral trabeculae (the mystery specimen is upside down, so they’re the side bits that point upward on either side) with a deep gap between them and the carina (the central keel area)  is very distinctive to the Galliformes, as you can see in this Chicken sternum.

Sadly, there is no comprehensive repository of sternum images available online (if I’m wrong please correct me!), so expecting a species identification on this one was a big ask. Instead I’ll just tell you that it’s from a Hazel Grouse Tetrastes bonansia (Linnaeus, 1758) and this one was collected in Russia and accessioned by the Dead Zoo in 1929.

Hazel Grouse, by kallerna, 2009.

Hazel Grouse, by kallerna, 2009.

These secretive birds occur across Eurasia, from Japan to as far west as eastern parts of France. They live in coniferous forests and feed on plants and insects, like most of their pleasantly pheasanty family.

 

Friday mystery object #298

This week it’s back to bones. I’ve had a couple of very helpful work experience students photographing some specimens from the Dead Zoo comparative osteology collection and here’s a distinctive bone for you to identify. The Order should be easy, the Family simple enough, but the Genus and Species may prove more difficult:

mystery298

So if you think you know what this is please put your suggestions in the comments below. Have fun!

Friday mystery object #297 answer

Last week I gave you this shiny green beetle with white spots (and apparently a penchant for making balloon animals) to identify:

mystery297

I thought it might offer a bit more of a challenge, but I forgot about Google. It turns out that a Google Image search using the key distinguishing features provides some useful images to compare, making this easier than I expected.

As palfreyman1414 correctly recognised (followed by many others), this is the Spotted Flower Beetle Stephanorrhina guttata (Olivier, 1789).

Of course, when dealing with historic museum collections things are never quite that simple, so the specimen on display is actually referred to by the genus name Ceratorrhina which isn’t recognised today. Ceratorhina was synonymised with Cyprolais, which is a subgenus (containing the Horniman Beetle) that’s in the genus Eudicella.

Of course, that means that this specimen may have been named incorrectly in the first place, since I’ve seen nothing to suggest that Ceratorrhina has been directly linked to beetles in the genus Stephanorrhina which sometimes carry the synonym Aphelorhina in older collections information.

It would be interesting to work out how the incorrect name was applied to this display specimen, but I have an inkling that there was once a rogue curator who just liked to cause taxonomic trouble…

Friday mystery object #297

Happy Friday everyone! Once again it’s time for the mystery object and once again I’m in a different country and am relying on a photo I have on my phone to supply you with a specimen for identification. That means the photo isn’t ideal, but it does mean I have something a bit different from the usual skull or bone:

mystery297

Any idea what species this colourful insect and its less lovely larva might be?

As always you can put your questions, observations and suggestions in the comments section below. Have fun!

Friday mystery object #296 answer

Last week I gave you this lovely little shell to try your hand at identifying:

mystery296

It’s a specimen that was given to the Dead Zoo recently by a regular contributor to the collections and it’s particularly interesting because it might be the first record of this species in Ireland (this is currently being researched for publication by the donor, so I won’t give away too much detail).

What I will say is that this is one of the reasons species identifications can be very important, since our understanding of how species move around has implications for various aspects of society and you don’t want to make decisions based on bad information. If you don’t know what I mean by that, I’ll give you some examples.

Zebra mussels arrived in Ireland in the 1990s from the Black and Caspian Seas and they’ve bred prolifically. They altered freshwater ecosystems by filtering out plankton that other species depend on for survival and they form hard-to-remove clusters that foul boat hulls and block drainage and cooling pipes. They’re in North America too, and in 15 years they are estimated to have cost hydroelectric and water treatment plants somewhere in the region of $267 million to remove or defend against. It’s cheaper to defend against them than to remove them and fix the problems they cause, so you need to know what you’re dealing with.

Retrieval of zebra mussel-encrusted Vector Averaging Current Meter near Michigan City, IN. Lake Michigan, June 1999. Photo by M. McCormick, NOAA, Great Lakes Environmental Research Laboratory

Retrieval of zebra mussel-encrusted Vector Averaging Current Meter near Michigan City, IN. Lake Michigan, June 1999. Photo by M. McCormick, NOAA, Great Lakes Environmental Research Laboratory

Signal crayfish are another freshwater invasive species, this time from America, that have caused havoc in Europe because they are linked to the dreaded Crayfish plague (I kid you not). The American crayfish are resistant to this fungal(ish) disease, but they act as hosts and carriers. Ireland is the last country in Europe to be free of the invasive crayfish, but are constantly alert to the dangers they can pose to the native species.

Signal crayfish by David Perez, 2009

Signal crayfish by David Perez, 2009

I should say that the many introduced species aren’t actually all that problematic. I’ve not heard that Little Owls (introduced by the Victorians for the cuteness) or Ring-necked Parakeets (escapees from aviaries) have had any significant impact in the UK. Still, it’s interesting to know when species turn up somewhere, especially if it reflects a change in the environment that may have other impacts.

Little Owl by Arturo Nikolai, 2008

Little Owl by Arturo Nikolai, 2008

Noble False Widow spiders were a harmless addition to the UK fauna back in 1879, that were quietly tucked down in Devon until the changing climate gave them the conditions to move further north. Now they’re up as far as Liverpool thanks to our warmer winters. Similar patterns are seen for a variety of Mediterranean species, demonstrating how we can track changes in our environment by keeping track of where and when certain species are found – but if you don’t get the species right, you don’t have good data. That’s part of why we have museums in the first place, to lodge ‘voucher’ specimens of recorded species so identifications can be double checked in the future.

Steatoda nobilis, Forest Hill, London, by Paolo Viscardi, 2014

Noble False Widow

Of course, I’m sure that you all appreciate the importance of getting identifications correct, since here you are reading my blog which tends to be all about identification! For those of you who recognised the mystery object as a scallop of some sort I tip my hat, but to Daniel Jones I offer congratulations – this is indeed a Calico Scallop Argopecten gibbus (Linnaeus, 1767) which is, as Joe Vans suggested, a juvenile. Normally these are found on the Atlantic coast of America. Well done! I’ll let you know more about the specimen when the paper is published.

More interesting dead stuff to come next Friday…

Friday mystery object #296

This week I’ve been in the USA couriering a loan back from the stunning Corning Museum of Glass (I’ll write about that sometime soon). However, that means I’ve had limited access to specimens for this week’s mystery object and I’m restricted to what I’ve got on my phone. Fortunately, I have this non-vertebrate mystery object for you to try your hand at identifying to species:

mystery296

It’s quite a cool specimen and I’ll tell you why next week! Have fun!

Friday mystery object #295 answer

Last week I gave you a bit of detail about a particular collection at the Dead Zoo in Dublin, which we don’t have much information about. In particular I was interested in your opinion on this specimen:

mystery295

The general consensus was that it’s a parrot, which I totally agree with and the there was discussion of Lorikeet and Parakeet based largely on the size. Palfreyman1414 noted that the skull was longer than you normally see in a parrot – which is true, but that length is mainly coming from the bill, and you have to keep in mind that parrots have a weird hinge on the upper part of their bill, which allows more mobility. This specimen has simply been prepared with the bill in a slightly elevated position, creating a misleading sense of a length in the skull.

The morphology of the  mandible is quite useful in distinguishing parrots, and to me this looks like it may belong to a Cobalt Winged Parakeet Brotogeris cyanoptera (Salvadori, 1891) although I’ve not seen a scale or  for any other speciemens, I’m just basing it on the  morphology of that distinctive mandible

So many thanks for all of the suggestions!