Hincksella Billard, 1918

publication ID	https://doi.org/ 10.5852/ejt.2015.135
DOI	https://doi.org/10.5281/zenodo.3794661
persistent identifier	https://treatment.plazi.org/id/F82B3D26-D171-3A1D-5F72-FEEA7355058A
treatment provided by	Carolina
scientific name	Hincksella Billard, 1918
status

Key to species

The following key comprises all species currently included in the genus Hincksella .

1. Colonies pinnate ……………………………………………………………………………………2

– Colonies with simple stems …………………………………………………………………………5

2. Hydrothecae shallow …………………………………………………… H. sibogae Billard, 1918 View in CoL

– Hydrothecae deep …………………………………………………………………………………3

3. Hydrotheca adnate for one-third ……………………………………… H. formosa (Fewkes, 1881) View in CoL

– Hydrotheca adnate for half its length ……………………………………………………………4

4. Free part facing outward …………………………………………… H. alternans ( Allman, 1888) View in CoL

– Free part facing upward ………………………………………………… H. indiana Millard, 1967 View in CoL

5. Perisarc of hydrotheca finely and densely striated …………………………………………………6

– Perisarc of hydrotheca smooth or wrinkled ………………………………………………………7

6. Hydrotheca making an almost right angle with the stem ……………………… H. similis View in CoL sp. nov.

– Hydrotheca making an acute angle with the stem …………………… H. neocaledonica View in CoL sp. nov.

7. Perisarc of hydrotheca wrinkled ……………………………………… H. corrugata Millard, 1958 View in CoL

– Perisarc of hydrotheca smooth ……………………………………………………………………8

8. Hydrotheca exceedingly long …………………………………………… H. pusilla Ritchie, 1910 View in CoL

– Hydrotheca moderately long ………………………………………………………………………9

9. Aperture of hydrotheca facing outward ……………………………………… H. cornuta View in CoL sp. nov.

– Aperture of hydrotheca facing upward …………………………………………………………10

10. Hydrotheca isodiametric throughout ………………………………… H. projecta ( Fraser, 1938) View in CoL

– Margin of hydrotheca distinctly flaring ……………………………… H. rigida ( Fraser, 1938)