Helianthaster rhenanus was first described in 1862 by Roemer, based on fossils found in the Bundenbach area in Germany, dating back to the lower Devonian.
Helianthaster was variously attributed to Asteroidea, Ophiuroidea or to another group (Auluroidea ), but only recently this echinoderm and its close relatives (Helianthasteridae ) have been attributed with some certainty to Asteroidea (Blake, 2009).
Other very similar starfish were the North Americans Arkonaster (Middle Devonian) and Lepidasterella ( Carboniferousmedium), the latter with 24 arms.
This animal, similar to modern starfish, had a diameter that could exceed 15 centimetres with extended arms. Helianthaster had 14 - 16 arms, elongated and thin, with an aboral surface with granular ossifications. The mouth was wide and composed of rather large oral plates; there were thorns on the adambulacrali, while the central disc was composed of small ossicles.
A study of the type specimen was examined with the use of X- rays. The result was images that seem to confirm the presence of large semicircular muscle flanges along the middle of the arms (Südkamp, 2011).
The second image you see here is a specimen from the Teylers Museum in Haarlem, the oldest museum in the Netherlands established in 1778.
We have a cloth merchant turned banker to thank for both the building and this specimen. And, in a way, the beginnings of nomenclature. Pieter Teyler van der Hulst left us this legacy including many of the museum's specimens and the nest egg that would allow its expansion to the glory we enjoy today.
Pieter lived next to George Clifford III, the financier of Swedish naturalist Carlo Linnaeus. Pieter's funds aided George in funding Linnaneus' work. In a bit of full circle scientific poetry, it was those dollars and this work that gave us the naming system that allowed us to attach a scientific name to this very specimen through Carl's binomial nomenclature.
In taxonomy, binomial nomenclature ("two-term naming system"), or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin grammatical forms, although they can be based on words from other languages. Such a name is called a binomial name (which may be shortened to just "binomial"), a binomen, binominal name or a scientific name; more informally it is also historically called a Latin name. So, for this lovely specimen, Helianthaster rhenanus is this specimen's Latin name.
In his will, Pieter Teyler decided that his collection and part of his fortune should be used to create a foundation for their promotion, the Teylers Stichting (Teyler foundation).
Teyler's legacy to the city of Haarlem was divided into two societies Teylers Eerste Genootschap (Dutch: Teyler's First Society ) or 'Godgeleerd Genootschap' ( Theological Society ), aimed at the study of religion, and the Teylers Tweede Genootschap ( Second Society ), dedicated to physics, poetry, history, drawing and numismatics.
The executors of Teyler's wishes, the first directors of Teylers Stichting, decided to establish a centre for study and education. Books, scientific instruments, drawings, fossils and minerals, would be housed under one roof.
The concept was based on a revolutionary ideal derived from the Enlightenment: people could discover the world independently, without coercion from the church or the state. The example that guided the founders in creating the Teyler Museum was the Mouseion of classical antiquity: a "temple for the muses of the arts and sciences" which would also be a meeting place for scholars and host various collections.
This was a time when science and religion were still intermixed but beginning to divide into separate camps. The world was at war, expeditions were undertaken to secure new lands and trade routes—and the slave trade was slowly being abolished. In 1778, Russia controlled Alaska and would not sell to the USA, a country two years old in 1778, for another eighty-nine years in 1867.
Here are some of the world events that happened in 1778, the year this museum was founded to give all of this a bit more context:
- January 18 – Third voyage of James Cook: Captain James Cook, with ships HMS Resolution and HMS Discovery, first views Oahu then Kauai in the Hawaiian Islands of the Pacific Ocean, which he names the Sandwich Islands.
- February 5 – South Carolina becomes the first state to ratify the Articles of Confederation. General John Cadwalader shoots and seriously wounds Major General Thomas Conway in a duel after a dispute between the two officers over Conway's continued criticism of General George Washington's leadership of the Continental Army.[1]
- February 6 – American Revolutionary War – In Paris, the Treaty of Alliance and the Treaty of Amity and Commerce are signed by the United States and France, signalling official French recognition of the new republic.
- February 23 – American Revolutionary War – Friedrich Wilhelm von Steuben arrives at Valley Forge, Pennsylvania and begins to train the American troops.
- March 6–October 24 – Captain Cook explores and maps the Pacific Northwest coast of North America, from Cape Foulweather (Oregon) to the Bering Strait.
- March 10 – American Revolutionary War – George Washington approves the dishonourable discharge of Lieutenant Frederick Gotthold Enslin, for "attempting to commit sodomy, with John Monhort a soldier."
- July 10 – Louis XVI of France declares war on the Kingdom of Great Britain.
- July 27 – American Revolutionary War – First Battle of Ushant – British and French fleets fight to a standoff.
- August 3 – The La Scala Opera House opens in Milan, with the première of Antonio Salieri's Europa riconosciuta.
Many more things happened, of course. Folk were born, fell in love, died—and some left legacies that we still enjoy to this day.
Photo two by Ghedoghedo, CC BY-SA 4.0.
