Invertebrate Collection (page 50)

Dictyonema, graptolite
Shown here is Dictyonema, a Cambrian dendroid graptolite. Graptolites are the fossil remains of small colonial animals. Graptolite colonies were connected together by living tissue

Callophrys rubi (Linnaeus), green hairstreak
A resting green hairstreak butterfly from the family Lycaenidae. This is a widespread butterfly that can be found all over Europe as well as in Siberia. Photographed by Frank Greenaway

Ammonite selection
Three ammonites as follows: (Left to right) Oistoceras wrighti; Asteroceras obtusum (zonal index species); Tragophylloceras loscombi all specimens originate from the Jurassic rocks near Lyme Regis

Athleta luctator, fossil sea snail
A fossil sea snail (Athleta luctator) dating from the late Eocene rocks around Barton, England

Orthoconic nautiloid, originating from near Castleton, England. The more unusual straight-shelled species belonging to the same group as ammonites and to todays living nautilus

Three brachipods
Shown here are three brachiopods (right to left) Dielasma hastata, Martinia glabra and Pleuropugnoides pleurodon. Specimens originate from near Castleton, England

Ostrea sp. oyster with pearls
Oysters are bivalve molluscs found on the sea bed. Pearls, are smooth, spherical objects which can form inside their shells. They are considered valuable and are farmed and used to make jewellery

Rough and polished coral specimens
Rough and polished pink and white coral specimens held at the Natural History Museum, London

Pentacrinites, crinoid
Pentacrinites is a fossil crinoid from the Jurassic. Crinoids are ancient, marine organisms. The majority have long stalks anchored to the bottom

Asteroceras obtusum, ammonite
Shown here is a Jurassic ammonite. Ammonites are an extinct group of fossil cephalopods related to todays Nautilus

Trigona, bivalves
Shown here are a pair of Jurassic bivalves. Bivalves are shelled creatures and first appeared in the Middle Cambrian and are still common in todays seas and oceans

Silurian seascape

Asteroceras marstonensis and Promicroceras, ammonites

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