Invertebrates extinct in the last 100 years

How many species have gone extinct in the last 100 years? This is not an easy question to answer....

 
The following list has been compiled:
 
Dates of "extinction" for well-studied invertebrates in Britain

 

Dates last seen in Britain are given (in some cases these are approximate, due to lack of precise data).
 
Lepidoptera (butterflies and moths)
Butterflies
 
   
Species name
Binomial
Approximate last date
Large Copper
Lycaena dispar dispar
1865
Black-veined White
Aporia crataegi
1925
Large Blue
Maculinea arion
1979
Mazarine Blue
Cyaniris semiargus
1906
   
Moths
 
   
Isle of Wight Wave
Idaea humilata
1931
The Many Lined
Costaconvexa polygrammata
1875
Frosted Yellow
Isturgia limbaria
1914
Speckled Beauty
Fagivorina arenaria
1885
White Prominent
Leucodonta bicoloria
1865
Reed Tussock
Laelia coenosa
1875
Gypsy Moth
Lymantria dispar
1907
Scarce Black Arches
Nola aerugula
1898
Small Ranunculus
Hecatera dysodea
1937
The Conformist
Lithophane furcifera suffusa
1880
Flame Brocade
Trigonophora flammea
1919
Orache Moth
Trachea atriplicis
1915
Union Rustic
Apamea pabulatricula
1919
Viper's Bugloss
Hadena irregularis
1977
   
Odonata (dragonflies and damselflies)
   
Species name
Binomial
Approximate last date
Norfolk damselfly
Coenagrion armatum
1957
Dainty damselfly
Coenagrion scitulum
1953
Orange-spotted Emerald
Oxygastra curtisii
1957
   
Coleoptera (beetles)
 
   
Species name
Binomial
Approximate last date
A ground beetle
Agonum sahlbergi
1914
A ground beetle
Harpalus honestus
1905
A ground beetle
Scybalicus oblongiusculus
1926
A water beetle
Rhantus aberratus
1904
A water beetle
Graphoderus bilineatus
1906
A water beetle
Ochthebius aeneus
1913
A histerid
Teretrius fabricii
1907
A tenebrionid
Platydema violaceum
1957
   
A further 56 species were lost from Britain before 1900
   
Hymenoptera (bees, wasps and ants)
   
Species name
Binomial
Approximate last date
A mason wasp
Odynerus reniformis
1915 
A mason wasp
Odynerus simillimus
1905
A digger wasp
Mellinus crabroneus
c1950
A mining bee
Andrena polita
1934
A mining bee
Halictus maculatus
1930
A mining bee
Eucera tuberculata
1941
A bumblebee
Bombus cullumanus
1926
   
A further 18 species were lost from Britain before 1900
   
Trichoptera (caddis flies)
   
Species name
Binomial
Approximate last date
   
A caddis fly
Hydropsyche bulgaromanorum
1926
A caddis fly
Hydropsyche exocellata
1901