Calcivascularis jansae Wiegand, 1984b
Possibly a distal process comparable to that of Calcivascularis jansae, or alternatively a loxolith bearing a distal process as in Calcivascularis cassidyi. The distal process comprises a protolith rim infilled by several radiating or curving segments.
Bergen, J. A., Boesiger, T. M. & Pospichal, J. J. 2014. Low-latitude Oxfordian to Early Berriasian nannofossil biostratigraphy and its application to the subsurface of Eastern Texas. In: Hammes, U. & Gale, J. (Eds.) Geology of the Haynesville Gas Shale in East Texas and West Louisiana, U.S.A. American Association of Petroleum Geologists, Memoirs. 105: 69-102.
Wiegand, G. E., 1984b. Two new genera of calcareous nannofossils from the Lower Jurassic. Journal of Paleontology 58(4), 1151-1155.