Morphology of Caecum (Caecidae) including important shell features used for morphological species identification. USNM 1618850 Caecum imbricatum – specimens to the left. Abbreviations: a, aperture; cgs, ciliated gliding sole; eg, egg; ey, eye; fp, fecal pellets; hf, retracted head and foot; mu, mucro; op, operculum; se, septum; st, shell structure (ornamentation); t, tentacle; tb, tube. Scale bar: 500 µm.

 
 
  Part of: Egger C, Neusser TP, Norenburg J, Leasi F, Buge B, Vannozzi A, Cunha RL, Cox CJ, Jörger KM (2020) Uncovering the shell game with barcodes: diversity of meiofaunal Caecidae snails (Truncatelloidea, Caenogastropoda) from Central America. ZooKeys 968: 1-42. https://doi.org/10.3897/zookeys.968.52986