Deep-water Rissoidae of the genera Benthonella Dall, 1889 and Benthonellania Lozouet, 1990 (Gastropoda, Caenogastropoda, Rissooidea) from French Polynesia Author Amati, Bruno Largo Giuseppe Veratti, 37 / D, 00146 Roma (Italy) bruno_amati@yahoo.it Author Giulio, Andrea Di Dipartimento di Scienze, Università “ Roma Tre ”, Viale Marconi, 446, 00146 Roma (Italy) & Laboratorio Interdipartimentale di Microscopia Elettronica (LIME), Università “ Roma Tre ”, Roma (Italy) andrea.digiulio@uniroma3.it Author Oliverio, Marco Dipartimento di Biologia e Biotecnologie ‘ Charles Darwin’, Sapienza Università di Roma, Viale dell’Università 32, I- 00185 Roma (Italy) marco.oliverio@uniroma1.it text Zoosystema 2022 2022-06-28 44 12 335 389 journal article 89521 10.5252/zoosystema2022v44a12 7ccbafc8-5635-41f4-a7da-05f303b9bb8e 1638-9387 6794846 urn:lsid:zoobank.org:pub:ECBC345E-3870-4935-B430-744969F3DFD4

APPENDIX 9. — Measurements of teleoconch and protoconch of Benthonellania alis n. sp. in mm, with range, mean and standard deviation: 1, holotype, Australes, Côte Sud de Rurutu, 520-950 m depth; 2-10 paratypes, Australes, Côte Sud de Rurutu, 520-950 m depth.

Teleoconch	1	2	3	4	5	6	7	8	9	10	Min-max	Mean	Std
Heigth	3.35	4.0	3.5	3.75	3.70	3.45	3.65	3.30	3.25	3.05	3.05-4.0	3.5	0.279881
Width	1.79	2.20	2.0	2.05	2.05	2.0	2.0	1.85	1.87	1.75	1.75-2.20	1.956	0.138098
Height/Width ratio	1.875	1.818	1.750 1.830 1.805 1.725 1.825					1.784	1.738	1.743	1.725-1.875	1.7893	0.049248
Aperture heigth	1.23	1.45	1.25	1.45	1.40	1.25	1.32	1.20	1.25	1.10	1.10-1.45	1.29	0.11392
Height/Height aperture ratio	2.723	2.758	2.800 2.590 2.643 2.760 2.765					2.750	2.600	2.773	2.590-2.800	2.7162	0.07621
Height last whorl	2.20	2.40	2.15	2.30	2.30	2.20	2.25	2.0	2.10	1.92	1.92-2.40	2.182	0.145358
Height/Height last whorl ratio	1.522	1.666	1.628 1.630 1.608 1.568 1.622					1.650	1.548	1.588	1.522-1.666	1.603	0.045891
No. of whorls	4	4.6	4.2	4.25	4.5	4	4.2	4.2	4.1	3.8	3.8-4.6	4.185	0.235761
No. axial ribs on last whorl	20	24	21	20	21	23	22	22	19	19	19-24	21.1	1.66333
No. spiral cords on last whorl	3	3	3	3	3	3	3	3	3	3	3	3	0
Varix	no	no	no	no	no	no	no	no	no	no	no	no	–
Umbilical false chink	yes	yes	no	yes	yes	yes	no	no	no	no	no-yes	no-yes	–
Protoconch	1	2	3	4	5	6	7	8	9	10	Min-max	Mean	Std
Heigth	0.337	0.375	0.325 0.350 0.350 0.350 0.375					0.375	0.325	0.325	0.325-0.375	0.3487	0.020822
Diameter of nucleus	0.075	0.075	0.075 0.075 0.087 0.087 0.082					0.087	0.075	0.075	0.075-0.087	0.0793	0.005736
Diameter of first half whorl	0.175	0.125	0.150 0.150 0.157 0.170 0.157					0.162	0.137	0.162	0.125-0.175	0.1545	0.014916
Maximum diameter	0.412	0.400	0.387 0.437 0.420 0.437 0.425					0.450	0.400	0.425	0.387-0.450	0.4193	0.019653
No. of whorls	2.3	2.7	2.3	2.5	2.4	2.25	2.4	2.35	2.4	2.4	2.25-2.7	2.4	0.12693
Multispiral	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes	–
Paucispiral	no	no	no	no	no	no	no	no	no	no	no	no	–