Extremely rare unknown fossil horseshoe crab species in Mazon Creek like nodule

Description

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Specimen:
Extremely rare unknown horseshoe crab - something other than more common
Euproops
or
Bellinurus
Locality:
All detailed and accurate data will be provided with the specimen
Stratigraphy:
Upper Carboniferous,
Bashkirian
-
Westphalian A,
Age:
ca. 315 Mya
Nodule size :
ca 3,0 x 3,0 x 2,0 cm
( white square on pictures is 1,0 x 1,0 cm)
Description:
Extremely rare unknown horseshoe crab - something other than more common
Euproops
or
Bellinurus
Horseshoe crabs resemble crustaceans, but belong to a separate subphylum, Chelicerata, and are closely related to eurypterids and arachnids. The earliest horseshoe crab fossils are found in strata from the late Ordovician period, roughly 450 Mya.
Horseshoe crabs are marine arthropods of the family Limulidae and order Xiphosura or Xiphosurida, that live primarily in and around shallow ocean waters on soft sandy or muddy bottoms. They occasionally come onto shore to mate. They are commonly used as bait and in fertilizer. In recent years, a decline in the population has occurred as a consequence of coastal habitat destruction in Japan and overharvesting along the east coast of North America. Tetrodotoxin may be present in the roe of species inhabiting the waters of Thailand.
Because of their origin 450 million years ago (Mya), horseshoe crabs are considered living fossils.