The second picture shows the small rock that the little star fossil is embedded in.
Revised: At a KYANA fossil study session, I was shown a set of articles from the University of Kansas on crinoid stem classification. It had a series of shapes and names for them. One shape was a six pointed star labeled hexagonalis (hex - Greek for six and gonia - Greek for corner or angle). Since this shape has 7 corners, it could be called a heptagonalis (hepta - Greek for seven).
Also since there is a dot in the middle of the shape, you add a prefix to this word above so if the shape in the middle is a circle, cyclohexagonalis or cycloheptagonalis; if ellipse shape in middle then Ellipsahexagonalis or Ellipsoheptagonalis.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh5_2_MlcLB8hR2g-LM4K13oREhjcgO4285rFl_3OXuNz_I7R09EkKi0L3T5e9Fr3sBixP7XP0Urc9M8rFwW7PktarX1sc5V9fu_bbl_sHEFidbR00Bno3A4ZaHNhjyhBgJt32k1kWmAP03/s400/sod.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmU7CYSabcHc_X1s8W83Olc5jrDmcMHL-wo3hVupT630VVgQR6-2b8g6nyuoLtoM0Jpgvip-2hh5GTFS3tE-bPBebVLAHGW84iqUbdwIeobW8bLkHw1a6X8mRdX_HO2nYA3xaXLj_ynw01/s400/sodrock.jpg)