Coal armored Spider fossil trigonotarbid arachnid in Mazon Creek like nodule !

Description

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Specimen:
Extremely RARE paleozoic fossil predator arachnid -
Trigonoterbid sp.
? Carboniferous trigonotarbid
armored spider arachnid !
Locality:
All detailed and accurate data will be provided with the specimen
Stratigraphy:
Upper Carboniferous, Middle Pennsylvanian / Westphalian A - orzeskie beds
Age:
ca. 310 - 315 Mya
Matrix dimensions:
ca 3,5 x 3,0 x 0,7 cm ( white square on pictures is 1,0 x 1,0 cm)
Description:
Extremely rare carboniferous fossil armored spider arachnid - Trigonotarbid.  Trigonotarbids were spider-like arachnids, but without silk-producing spinnerets. They ranged in size from a few millimetres to a few centimetres in body length and had segmented abdomens, with the tergites across the backs of the animals' abdomens, which were characteristically divided into three or five separate plates.
Probably living as predators on other arthropods, some later trigonotarbid species were quite heavily armoured and protected themselves with spines and tubercles. About seventy species are currently known
.