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On Friday Julian Carter, our Natural History conservator, and I travelled to Swansea to retrieve some Blaschka glass models from one of the cases there and replace them with a new display of marine animals and seaweeds you might find living in rocky areas. The Blaschka models had been on display there for several years and we needed some of them for the new Wriggle! exhibition opening at the end of this week (18th June).

The first job was to actually work out how to get into the case itself as it was so long since anyone had opened it no-one was sure how to do so! It was soon worked out though and the models were carefully placed into their protective packaging  for the journey back to Cardiff.  This involved carefully pinning blocks of plastazote and bubble wrap around them in specially created boxes so that they were cushioned against any jolting during transport. They are so intricate when you look at them that it can be quite nerve-wracking when you are not used to handling them, particularly the worms whose long, delicate tentacles look like they might snap off at any moment.  I was however assured that with careful handling most are actually very easy to move. They will be a wonderful addition to Wriggle!

Once they were packed away, it was the turn of the new specimens to be arranged in their place. The specimens were a range of animals that represent rocky habitats both onshore and offshore including crabs, shells, seaweeds, a piece of honeycomb worm reef and even a cup coral, hopefully some species that people will recognize and some they won’t. Some had been specially prepared for use in this display. It’s always interesting putting something like this together, looking through the collections to see what is available and might be suitable and then preparing it for display.

The display did not take long to finish and then we were done and on our way back to Cardiff after a successful day.

For more information about the Blaschka glass models at National Museum Cardiff click here

Why not pop along to the National Waterfront Museum to see the new display.

Between 20 June and 4 July, our popular Evolution of Wales galleries will be closed while we undertake some essential maintenance work.

For these two weeks, visitors will not be able to access areas showing the introduction, Big Bang, Carboniferous forest, dinosaurs, mammoth or the Ice Age animals. Other galleries remain open during this time, including the Diversity of Life gallery (with lots of birds), the mineral collection and all the natural history galleries with the British woodland scene, basking shark, hump back whale skeleton and our new exhibition Wriggle! The art galleries upstairs are also open, unaffected by the maintenance work.

The work covers improved care of the collections and sustainability of the building, including:

  1. Changing the gallery lighting to LED, to reduce electricity consumption, our carbon footprint and costs. LED lighting gives off less heat than conventional lighting so the air conditioning system will work better - it’s better for the items on display, because keeping a stable temperature helps maintain the condition of the objects. LED lighting also reduces future maintenance costs, and changes to the lighting will make the galleries brighter in some places.
  2. Improvements to the fire alarm system so it's better for the collections, the building, staff and visitors.
  3. Upgrading video screens from CRT to HD LCD with touch button interactive controls. This will improve video content delivery, reduce maintenance costs and provide a contemporary aesthetic to the gallery, making units more streamlined.
  4. While the galleries are closed curators will be able to secure some of the items that have become loose in the cases, thus improving their long-term care. They will also clean the displays thus reducing the risk of potential pest infestations – pest management is vital to the care of museum collections.
  5. Finally, installation of the new life-sized recreation of the new Welsh dinosaur, Dracoraptor hanigani as part of the dinosaur display.

This blog is about fossils whose beautiful patterns have intrigued us for as long as we’ve been human. These animals survived the evolutionary power struggles of the past to leave their relatives in today’s oceans. They are the Sea Urchins, or to give them their scientific name, the Family Echinoidea - Echinoids to their friends.

 

A ‘Hedgehog’ by name, but not by nature

Their name comes from the Greek ‘Echinus’, meaning Hedgehog, because of their spines. People in the Middle Ages had the idea that each kind of land animal had a matching version living in the sea; sea-horses, sea-cows, and so on. So the spiky Echinoid was naturally called a Sea-Hedgehog. This might sound daft today, but we still call the Echinoids’ cousins “Starfish” though we know they’re nothing to do with fish at all !

 

Like little armoured aliens

The bodies of echinoids are really strange, almost like something from science-fiction. Being covered in massive spiny stilts you can walk on is weird enough, but inside their box of a shell they’re even more peculiar. They have a multi-purpose organ called the water vascular system. It’s a central bag of fluid connected to five lobes which lead to many tiny tubes coming out through pores in the shell. These are its tube-feet. It can move them around by changing the pressure inside the bag. They’re very handy for dragging itself along the sea floor, sensing the surroundings, and for getting food to its mouth. Some burrowing echinoids can even stick a tube foot up above the sand to get oxygen from the water.

Their basic body plan has proved to be very well adapted to a life of sea-bed scavenging. They move along like armoured tanks eating up whatever they can find; mostly algae, but their set of five toothed jaws can deal with a varied diet.

 

Cherished by the Ancients

The beautiful shells of echinoids have fascinated humans for a very long time indeed, maybe because they’re so different from other animals on the planet. Most animals have just one line of symmetry and an even number of limbs. But echinoids and their cousins the starfish can show star-like five-fold symmetry.

We know that this struck many people in the past. Ken McNamara gives the following two examples in his book “The star-crossed Stone” about the rich folklore of echinoids.

The oldest example of a collected and labelled fossil, is an echinoid with Egyptian hieroglyphics inscribed on it about 4000 years ago. It was found “in the south of the quarry of Sopdu, by the god’s father Tja-Nefer”. Sopdu was called the god of the morning star - he was a kind of border-guard god, and it’s been suggested that echinoids were important to the Egyptians in some way in their travels to the afterlife.

But human fascination with echinoids stretches back much, much further than that; long enough for the great ice sheets to have advanced and retreated across Britain four times since. About four hundred thousand years ago in what is now Kent, someone chose to make a tool from a flint containing a fossil echinoid. Most flint tools have two cutting edges, but this one may have been left unfinished on purpose. If the maker had chipped the flint to make the other edge, the fossil would have been destroyed. What is amazing is that this person was not a Homo sapiens like you or I, but either a Homo heidelbergensis or a very early Neanderthal (Homo neanderthalensis). Other humans were collecting fossils before members of our own species left Africa.

Trevor Bailey, Senior Curator – Palaeontology. This blog was adapted from a gallery tour I gave at the National Museum Cardiff.

Often, people announce - with a knowing look in their eye – that Science knows more of the surface of the moon than it does of the deep oceans of our own planet. This platitude is probably vague enough to be considered accurate, but it ignores a salient fact about Earth: a lot more is happening here, especially in the oceans, and even the smallest sample of abyssal mud contains a wealth of life sufficient for years of study. Oceanographic missions are rare because each one produces a superabundance of data and specimens that require decades of work to describe and interpret. The simple problem of man-hours and scarcity of expertise in niche fields is what limits the scope of modern oceanography (and the funding available to it).

Blue-sky thinking

The index case for this problem was that of the Challenger expedition of 1872-76, a sprawling endeavor to “investigate the physical conditions of the deep sea in the great ocean basins” - scarcely has an expedition brief been bolder or more vague – with a navy vessel and a small group of gentleman-scientists headed by Charles Wyville Thomson. Wyville Thomson had headed earlier voyages to chart the waters around the British Isles, discovering life down to depths of 1200 metres; he had become the patriarch of the nascent discipline of oceanography, which – before Challenger – was limited to a hazy understanding that a lot of the oceans were very deep indeed. The vessel set out with a complement of around 250 men of all ranks and stations, weighing anchor in Portsmouth in December 1872 and zigzagging down the Atlantic coast of Europe before striking out towards the Caribbean. She would sail on for almost eighty thousand miles, crossing and re-crossing the Atlantic before swooping down to the sub Antarctic Kerguelen archipelago, circling Australia and the Pacific, and finally passing through the Straits of Magellan at the tip of South America on her way home.

A challenging legacy

This, however, is not the end of the story. On her voyage, the Challenger measured depth and temperature and collected biota, samples of living organisms from the sea floor, at 360 stations along the route of her voyage. The vessel was fitted with a fully-equipped laboratory, and vast volumes of specimens, data, and readings were amassed during the three years at sea; sediment samples sealed in meticulously-labelled bottles and countless specimens steeped in alcohol, volumes upon volumes of log-books and charts, water samples, and photographic negatives. There is a limit to the amount of useful scientific study that can be done by half-a-dozen scientists on a ship, so the massed volume of potential information was stored for the journey before being distributed across the country upon the ship’s return, each major grouping of specimens going to an organisation or individual most proficient in the study of that given group. Thus began the process of documentation, interpretation, and publication which follows any respectable scientific endeavour; but from the start it was fraught with difficulty, and the project would outstrip the length of the voyage six fold in terms of years spent upon it.

Tome after tome…

The grandly-titled ‘Report of the Scientific Results of the Voyage of H.M.S. Challenger during the Years 1873-76’, and its associated texts, started trickling from the presses almost as soon as the ship returned to port, but publication would drag on across fifty volumes and more than 29,500 pages. These shelves of heavy tomes contained the distilled data of the expedition, beautifully illustrated with hand-coloured lithographs depicting the litany of species which described as new to science. Wyville Thomson oversaw the publications, but the stress of the project overwhelmed him and he withdrew in 1881, dying shortly afterwards. His place was taken by John Murray, his friend and fellow oceanographer on the voyage; the Report would not be completed until nineteen years after the Challenger docked, a vast, sprawling and prohibitively expensive manuscript which has yet to be matched in terms of vision, boldness and scope (and quite possibly cost) to this day. In the current climate of meandering austerity and profit-motivated science, it seems inconceivable that such a dedicated blue-skies expedition, and the years of follow-up, could be mounted in the 21st century; modern oceanography exists as a passenger, travelling alongside the oil industry and the world’s navies, everywhere studying the workings of nature through the lens of humanity’s impact upon it.

Echoes of Challenger

Echoes of Challenger appear everywhere in the study of samples from the deep ocean. Besides the heavy, leather-bound volumes that sit in the Mollusca Library at the Museum, the Ted Phorson collection which I’m currently working on contains swathes of sub-millimetre-sized mollusc shells (and other, stranger things) sampled from the North Atlantic by a remote vehicle (R.V.) designated vessel named Challenger, and Phorson himself worked on some of Charles Wyville Thomson’s still-unsorted specimens in the late 1970s, almost a hundred years on from when they were first collected. Modern scientific literature on the fauna of the deep oceans refers frequently to the Challenger Report, as so few works have tackled these organisms at the same level of detail since, and it seems unlikely that the oceanographers of the future will be able to; the days of the explorers are surely long gone. It is easy to feel a twinge of nostalgia for the scientific buccaneers of Challenger and, before it, the Beagle voyage – free from want for time and money, invested not with a desire for the wealth of nature, nor with a noble wish to save the oceans from man’s depredations, but instead willing to cast themselves out into the boundless wastes of the sea in search of the heady drug of knowledge, a pure and stupefying substance that raises one above the clouds, denied to us pragmatic, modern mortals. It is comforting to think of the vast mines of secrets that remain undreamt amid the vastness of the abyss, waiting for the explorers of the far future to uncover. Perhaps it is just as well that the days of the old sojourners are over, for now – after all, they have left the better part of their work undone.

The last year has been a busy one for the Department of Natural Sciences on the front line against invasive non-native species (INNS) in the UK.

INNS are introduced (or "alien") species that can spread and cause damage. Some INNS, like Japanese Knotweed and the Grey Squirrel, are all too familiar. Others, like most invertebrates, are unidentified and obscure when they first arrive.

It is often down to taxonomic specialists like us to identify these newly detected animals – with the help of museum collections – and to explain how they can be recognised.

In the last 12 months our Invertebrate Biodiversity team helped discover several more species new to the UK, and reported these in the Journal of Conchology and Aquatic Invasions. These are detailed peer-reviewed research papers, but such publications are not merely useful for specialists. They are referred to by agencies, policy-makers, and the public concerned about the spread and impacts of INNS in the UK and throughout Europe, as the range of other organisations we worked with shows.

The relevant specimens are accessioned at the Museum for future reference, and help ensure the national collections stay up-to-date with the changing fauna of Wales.The discoveries also make great stories about the surprises Britain’s wildlife still holds in store. We just hope that some will have happy endings!


1. Rogue Alsatian loose in Caerphilly

Aberbargoed naturalist Christian Owen spotted something weird during a meeting of the Glamorgan Fungus Group near Wern Ddu Claypits, Caerphilly (a noted geological and industrial site). Crawling under moss in the forestry plantations were several strange, small creatures, like overweight snails poking out of shells that are several sizes too small.

Using the Museum’s collections, we identified the species as the “Alsatian Semi-slug” Daudebardia rufa. This is a central European mollusc that has never been seen in the UK before. Despite being rather cute, it could be a nuisance since it feeds on other, wood-decaying invertebrates. We obtained forestry data for the area from partners from Natural Resources Wales, and our visits to the area so far suggest that the species is associated with certain conifer stands only.This story was featured in the Caerphilly Observer newspaper on 19 February 2016.

Reference: Owen, C, Rowson, B & Wilkinson, K. 2016. First record of the predatory semi-slug Daudebardia rufa (Draparnaud, 1805) from the UK (Eupulmonata: Daudebardiidae). Journal of Conchology 42(3) 119-121.

2. Sicilian Slug reaches Dublin and Swansea

We discovered the Sicilian Slug Deroceras panormitanum as new to Britain in central Cardiff in 2012. It is evidently rare, so we were surprised to find a large population during a night-time survey in Swansea in April 2015. They were infesting flowerbeds in Cwmdonkin Park (famous from Dylan Thomas’ “The Hunchback in the Park”), which we were investigating as part of a study with Swansea University and Bristol University.Our partner in the Conchological Society also found the species among plants at a garden centre in Dublin, the first record of this species in Ireland. Searches at Welsh garden centres have so far proved negative, but this species now seems very likely to spread.

Reference: Rowson, B, Anderson, R, Allen, S, Forman, D, Greig, C & Aziz, NAA. 2016. Another wave of invasion? First record of the true Sicilian Slug Deroceras panormitanum sensu stricto from Ireland, and another from Wales (Eupulmonata: Agriolimacidae). Journal of Conchology 42(3) 123-125.

3. Piggy-backing American worms in Abergavenny river

The introduced and prolific North American Signal Crayfish Pacifastacus leniusculus is a major threat to our native White-clawed Crayfish Austropotamobius pallipes through transmission of crayfish plague. Now, a new potential danger has been found. Joanna James, a PhD student at Cardiff University, discovered two species of crayfish worm (small leech-like annelids) living on the claws and carapaces of signals in the River Gavenny. These were identified in collaborative research with the Museum and a paper published in the journal Aquatic Invasions. University research is continuing into the impact these worms could have on invasive and native crayfish populations.

Reference: James, J, Cable, J, Richardson, G, Davidson, KE & Mackie, ASY. 2015. Two alien species of Branchiobdellida (Annelida: Clitellata) new to the British Isles: a morphological and molecular study. Aquatic Invasions 10(4) 371-383.

4. Big winter storms cast up trans-Atlantic migrants

Old buoys, fishing bait buckets and plastic spools double as rafts for many American invertebrates washed ashore on southwest coasts of the UK in recent years. UK Coastal Wildlife and APhotomarine often send images or specimens to the museum for identification. The newly-arrived bivalves had crossed the Atlantic inside buckets, or attached to the outside with byssus threads (as our native mussels attach to rocks).

One of these hitchhikers is considered an INNS in Brazil, where it outcompetes local bivalves for food and space. The Bicolor Purse Oyster Isognomon bicolor is native to the southern United States and parts of the Caribbean. Our current sea temperatures are slightly too low for it to reproduce, but if they continue to rise this and perhaps other American molluscs will need to be closely monitored.

Since reporting these finds in Journal of Conchology last year, further discoveries of yet more American species have been made and sent for identification. We thank the beachcombers who brave our shores every week to hunt for these potential invasives.

Reference: Holmes, AM, Oliver, PG, Trewhella, S, Hill, R & Quigley, DTG. 2015. Trans-Atlantic rafting of inshore Mollusca on macro-litter: American molluscs on British and Irish shores, new records. Journal of Conchology 42(1) 41-49.

5. Coconut conceals “shy” stowaways

When Cornish writer and beachcomer, Tracey Williams, discovered a beached coconut near Newquay, Cornwall she was surprised to find molluscs hidden inside. On closer inspection she found small white shells that had bored into the husk, which we later identified as the “Fragile Piddock” Martesia fragilis. They must have floated right across the Atlantic from the southeastern United States and washed ashore after the winter storms of 2013-14.

Notoriously difficult to identify, we searched the extensive shell collection at the Museum for other piddocks. We found that one more lot of the same species had been washed ashore at Galway in the late 1800’s but had been misidentified! Fragile piddocks are related to shipworms and can bore into wood, nuts and seeds, although thankfully are less destructive than their shipwrecking cousins.

Reference: Holmes, AM, Fenwick, D, Gainey, P & Williams, T. 2015. Martesia fragilis Verrill & Bush, 1898 in the north-east Atlantic. Overlooked and a recent new discovery. Journal of Conchology 42(2) 183-187.