Both Florissantoraphidia funerata and F. mortua are only known from the Florissant Formation, which has produced a series of other snakefly species in three different families.

The two cogeneric species can be separated by several features of the forewing, including a lack of terminal forks in veins along the posterior margin of the wing in F. funerata, and the radial cell bordering the pterostigma narrowing at the base in F.

[2] and published his type description in the journal Transactions of the Kansas Academy of Science (Volume 106) in 2003.

[2] Engel (2003) considered it possible the Florissant Formation species were members of one of the two nearctic genera Alena or Agulla.

[2] In a 2014 study Vladimir N. Makarkin and S. Bruce Archibald removed the species F. mortua and F. funerata from Raphidia, and transferred them to the new genus Florissantoraphidia.