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 12. — Measurements of teleoconch and protoconch of Benthonellania tuamotu n. sp. in mm, with range, mean and standard deviation: 1, holotype, Tuamotu, Tikehau 820-835 m depth; 2, Australes, Rimatara 920-930 m depth; 3, Tuamotu, entre Tikehau & Rangiroa, 976-997 m depth; 4-7, Tuamotu, Kaukura, 507-607 m depth; 8, Society Islands, Maupiti, 445-645 m depth; 9, 10, Tuamotu, Tikehau, 889 m depth.

Teleoconch	1	2	3	4	5	6	7	8	9	10	Min–max	Mean Std
Heigth	4.42	3.6	4.95	3.9	4.3	4.25	3.6	4.15	4.3	4.7	3.6-4.95	4.217 0.433719
Width	2.50	2.15	2.77	2.4	2.5	2.6	2.28	2.45	2.55	2.75	2.15-2.77	2.495 0.19179
Height/Width ratio	1.770	1.674	1.787	1.625	1.720	1.635	1.579	1.694	1.686	1.709	1.625-1.787	1.6879 0.064018
Aperture heigth	1.85	1.55	2.0	1.5	1.75	1.75	1.60	1.70	1.60	2.0	1.5-2.0	1.73 0.176698
Height/Height aperture ratio	2.391	2.322	2.475	2.600	2.457	2.428	2.250	2.441	2.687	2.350	2.250-2.687	2.4401 0.128579
Height last whorl	2.9	2.4	3.15	2.55	2.8	2.8	2.45	2.85	2.75	3.15	2.4-3.15	2.78 0.258414
Height/Height last whorl ratio	1.524	1.500	1.571	1.529	1.536	1.518	1.469	1.456	1.564	1.492	1.456-1.571	1.5159 0.037427
No. of whorls	4.5	4.0	5.1	4.2	4.5	4.5	4.0	4.5	4.6	4.7	4.0-5.1	4.46 0.330656
No. axial ribs on last whorl	20	17	18	20	18	18	16	18	14	16	14-20	17.5 1.840894
No. spiral cords on last whorl	4	4	4	4	4	4	4	4	5	8	4-8	4.5 1.269296
Varix	no	no	no	no	no	yes	yes	yes	no	no	yes-no	yes-no –
Umbilical chink	no	no	no	no	no	no	no	no	no	no	no	no –
Protoconch	1	2	3	4	5	6	7	8	9	10	Min-max	Mean Std
Heigth	0.400	0.375	0.390	0.375	0.375	0.380	0.390	0.350	0.375	0.350	0.350-0.400	0.376 0.016125
Diameter of nucleus	0.100	0.117	0.087	0.100	0.087	0.100	0.112	0.087	0.087	0.087	0.087-0.117	0.0964 0.011296
Diameter of first half whorl	0.187	0.185	0.170	0.190	0.175	0.160	0.187	0.155	0.175	0.175	0.155-0.190	0.1759 0.011808
Maximum diameter	0.475	0.450	0.450	0.437	0.425	0.462	0.412	0.425	0.430	0.455	0.412-0.475	0.4421 0.01953
No. of whorls	2.3	2.25	2.35	2.25	2.3	2.3	2.25	2.3	2.3	2.2	2.2-2.35	2.28 0.042164
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 –