Fig 1.
A map showing the locality of the Granton Shrimp Bed at Granton, Edinburgh.
Fig 2.
Examples of Caledonicratis caridum gen et sp. nov.
(A) Specimen NMS.G.2013.34.20. (B) Specimen NMS.G.2013.34.1. (C) Specimen NMS.G.2013.34.26, encrusting a crustacean skeleton. All specimens from Granton, Edinburgh, Granton Shrimp Bed, Visean.
Fig 3.
Caledonicratis caridum gen et sp. nov. with fan-like structures.
(A) General view of the specimen. (B) Enlargement of a branch detail (C) and (D) is a fan-like structure interpreted here as gonophore. (C) Top lighting. (D) The same structure, acute angle lighting. Specimen RSM 2013.34.13 from Granton, Edinburgh, Granton Shrimp Bed, Visean.
Fig 4.
Microstructure of Caledonicratis caridum gen et sp. nov., holotype.
(A) General view of a branch. (B-D) Details of the microstructure composed of evenly spaced, linear fibers, running parallel to the axis of the stems. SEM images of the holotype, specimen NMS.G.2015.1.1 from Granton, Edinburgh, Granton Shrimp Bed, Visean.
Fig 5.
Comparison of Caledonicratis caridum gen. et sp. nov. and extant Solanderia minima.
(A) A schematic drawing of a C. caridum branch, based on the holotype. Upper picture corresponds to the microstructure shown on the Fig 4B and 4C, lower corresponds to structures shown on the Fig 4D. Note that structure visible on the lower picture may be a diagenetic coating. (B) Microstructure of Solanderia minima (picture on the basis of the pl. V fig. 3 from [44]). Drawings by Bogusław Waksmundzki.
Fig 6.
EDS elemental mapping of Caledonicratis caridum gen et sp. nov.
(A) General view of a specimen. (B) Phosphorus concentrations. (C) Calcium concentrations. (D) Oxygen concentrations. The lighter the color, the higher relative abundance of a given element. Please note that abundances are not comparable between pictures, and reference level is different for each element. Specimen RSM 1982.66.18.(P) from Granton, Edinburgh, Granton Shrimp Bed, Visean.