Orbispala occultoforma is a species of fossil echinoid from the Middle Miocene, estimated to be around 14 million years old. This particular specimen, found in the Batesford Limestone Formation in the Geelong District of Victoria, Australia, consists of several echinoids preserved on a matrix. The largest echinoid in this grouping measures 5.0 x 4.6 x 1.4 cm. The Batesford Limestone is renowned for its rich fossil content, providing a detailed record of marine life from the Miocene epoch when the region was submerged under a shallow sea.

The echinoids in this specimen display the characteristic features of Orbispala occultoforma, with their tests clearly visible against the limestone matrix. The size and preservation of these fossils make them an excellent example of the species, showcasing the unique morphological traits that distinguish Orbispala occultoforma. The matrix setting not only adds context to the fossils but also offers insight into the sedimentary environment in which these echinoids lived and were eventually fossilized. This context is crucial for understanding the ecological conditions of the Middle Miocene seas in the Geelong District.

Described by Irwin in 1995, Orbispala occultoforma is significant for paleontologists studying the marine ecosystems of the Miocene. The Batesford Limestone Formation, where this specimen was found, has been a key site for uncovering the diversity and complexity of life during this period. The preservation of these echinoids on their natural matrix provides a valuable opportunity to study the species in situ, offering a more comprehensive view of their life history and the environmental factors that influenced their evolution. This specimen is an important piece in the puzzle of understanding the ancient marine environments of Victoria, Australia