Thumbnail crab

{{Short description|Species of crab}}

{{Redirect|Thia}}

{{Speciesbox

| image = Thia scutellata.jpg

| parent_authority = Leach, 1815

| taxon = Thia scutellata

| authority = (Fabricius, 1793)

| synonyms =

• Cancer residuus Herbst, 1799
• Thia polita Leach, 1815
• Thia blainvillii Risso, 1822

| synonyms_ref =  {{cite journal |journal=Raffles Bulletin of Zoology |year=2008 |volume=17 |pages=1–286 |title=Systema Brachyurorum: Part I. An annotated checklist of extant Brachyuran crabs of the world |author=Peter K. L. Ng |author2=Danièle Guinot |author3=Peter J. F. Davie |name-list-style=amp |url=http://rmbr.nus.edu.sg/rbz/biblio/s17/s17rbz.pdf }}

}}

The thumbnail crab, Thia scutellata, is a species of decapods, in the family of thiidae,{{Cite web|title=Thumbnail crab - Encyclopedia of Life|url=https://eol.org/pages/46508386|access-date=2021-05-28|website=eol.org|language=en}} whose carapace resembles a human thumbnail, a dense fringe of long hairs distinctly notched around the edge.{{Cite web |title=Thumbnail crab (Thia scutellata) |url=https://www.marlin.ac.uk/species/detail/1234 |access-date=2021-05-28 |website=marlin.ac.uk |publisher=MarLIN - The Marine Life Information Network}} Pale pink in colour with red to brown markings. It is found in the North Sea, north-east Atlantic and Mediterranean Sea.{{cite web |url=http://www.imv.uit.no/crustikon/Decapoda/Decapoda2/Species_index/Thia_scutellata.htm |work=Crustikon |title=Thia scutellata (J.C. Fabricius, 1793) |publisher=Tromsø Museum |author=Cédric d'Udekem d'Acoz |year=2003 |archiveurl=https://web.archive.org/web/20080219133356/http://www.imv.uit.no/crustikon/Decapoda/Decapoda2/Species_index/Thia_scutellata.htm |archivedate=February 19, 2008 |accessdate=November 19, 2006}} It is the only extant species in the genus Thia, although two fossil species are known.{{cite journal |journal = Raffles Bulletin of Zoology |year=2009 |volume = Suppl. 21 |pages=1–109 |title = A classification of living and fossil genera of decapod crustaceans |author1=Sammy De Grave |author2=N. Dean Pentcheff |author3=Shane T. Ahyong |url=http://rmbr.nus.edu.sg/rbz/biblio/s21/s21rbz1-109.pdf |display-authors=etal}} Their predators includes the atlantic cod.