Terebrasabella
publication ID |
https://doi.org/ 10.5281/zenodo.175840 |
DOI |
https://doi.org/10.5281/zenodo.5629681 |
persistent identifier |
https://treatment.plazi.org/id/03DA87C5-FFD2-BB12-FF5D-FF17878FFB51 |
treatment provided by |
Plazi |
scientific name |
Terebrasabella |
status |
|
Comparison of Terebrasabella View in CoL spp.
The characters that distinguish the two species described here are as follows:
Thoracic uncini form: Terebrasabella hutchingsae sp. nov., has two forms of acicular uncini (“palmate” and heterodont-crested uncini) both of which are different to the single type present in Terebrasabella fitzhughi sp. nov., (homodont-crested uncini). Terebrasabella heterouncinata possesses only heterodontcrested acicular uncini.
Abdominal uncini form: T. hutchingsae sp. nov., has acicular uncini that are a smaller version of the longhandled “palmate” uncini of chaetiger 1, whereas those of T. fitzhughi sp. nov., are homodont-crested with a series of many fine teeth. T. heterouncinata possesses long-handled heterodont-crested acicular uncini.
Ventral peristomial lappets: anteriorly elongate on specimens of T. fitzhughi sp. nov., and relatively shorter and distally-rounded on T. hutchingsae sp. nov. T. heterouncinata has small, triangular, distallyrounded ventral collar lappets.
The number of rasp-shaped avicular uncini per row: on chaetiger 7, is greater in T. hutchingsae sp. nov., (~50) than in T. fitzhughi sp. nov., (<24). T. heterouncinata has fewer uncini in chaetiger 7 (~23 per row), but more uncini in chaetiger 8 (~19 per row) than either of the other 2 species (both <15).
The faecal tracks of T. hutchingsae sp. nov., and T.fitzhughi sp. nov., bifurcate in the 8th chaetiger, not the in the 10th chaetiger as in T. heterouncinata .
The main characters that distinguish all three species of Terebrasabella are the different types of uncini. These are summarised in Table 1 View TABLE 1 .
Uncini number and type in thorax and abdomen of:
Chaetiger Terebrasabella heterouncinata Terebrasabella hutchingsae sp. Terebrasabella fitzhughi
nov. sp. nov.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.