File:1911 Britannica-Arachnida-Triarthrus Becki.png
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English: Restoration of Triarthrus Becki, Green, as determined by Beecher from specimens obtained from the Utica Slates (Ordovician), New York. A, dorsal; B, ventral surface. In the latter the single pair of antennae springing up from each side of the camerostome or hypostome or upper lip-lobe are seen. Four pairs of appendages besides these are seen to belong to the cephalic tergum. All the appendages are pediform and bi-ramose; all have a prominent gnathobase, and in all the exopodite carries a comb-like series of secondary processes. (After Beecher, from Zittel.) |
| Date | |
| Source |
 Encyclopædia Britannica Eleventh Edition, Vol. 2, Page 300 |
| Author | Encyclopædia Britannica, 1911 |
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This image comes from the 13th edition of the Encyclopædia Britannica or earlier. The copyrights for that book have expired in the United States because the book was first published in the US with the publication occurring before January 1, 1929. As such, this image is in the public domain in the United States. |  |
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| current | 20:24, 9 March 2015 | | 751 × 2,400 (373 KB) | Animalparty (talk | contribs) | larger |
| 00:03, 2 November 2012 |  | 325 × 1,081 (316 KB) | Clarice Reis (talk | contribs) | User created page with UploadWizard |
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