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 2. — Measurements of teleoconch and protoconch of Benthonella basistriata n. sp. in mm, with range,mean and standard deviation: 1, holotype Tuamotu, Tikehau, 889 m depth; 2, Society Islands, Huahine, 500-612 m depth; 3, Society Islands, Moorea, 485–560 m depth; 4, Moorea, 610 m depth; 5, Society Islands, Huahine, 557 m depth; 6-10, Tuamotu, Kaukura, 507-607 m depth.

Teleoconch	1	2	3	4	5	6 7	8	9	10	Min-max	Mean	Std
Heigth	2.0	2.47	2.05	2.25	2.25	2.50 2.50	2.50	2.60	1.95	1.95-2.60	2.30,7	0.240002
Width	1.30	1.55	1.30	1.50	1.40	1.55 1.62	1.60	1.55	1.32	1.30-1.62	1.46,9	0.126794
Height/Width ratio	1.538	1.596	1.577	1.500	1.607	1.613 1.543	1.562	1.677	1.477	1.477-1.677	1.56,9	0.05845
Aperture heigth	0.82	1.0	0.85	0.97	0.95	1.07 1.02	1.0	1.0	0.87	0.82-1.07	0.95,5	0.08182
Height/Height aperture ratio	2.424	2.450	2.412	2.319	2.368	2.336 2.451	2.500	2.600	2.241	2.241-2.600	2.41	0.100975
Height last whorl	1.30	1.65	1.37	1.50	1.50	1.70 1.65	1.06	1.72	1.35	1.30-1.72	1.53,4	0.21145
Height/Height last whorl ratio 1.538		1.500	1.491	1.500	1.500	1.470 1.515	1.562	1.512	1.444	1.444-1.562	1.503	0.032781
No. of whorls	3.25	3.45	3	3.25	3.25	3.75 3.5	3.65	3.75	3	3-3.75	3.38,5	0.279931
No. axial ribs on last whorl	18	15	17	17	20	16 15	14	14	17	14-20	16.3	1.888562
No. spiral cords on last whorl 6		6	6	5	5	6 5	6	6	6	5-6	5.7	0.483046
Varix	yes	yes	yes	yes	yes	yes yes	yes	yes	yes	yes	yes	–
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	0.34	0.31	0.41	0.40	0.35	0.30 0.32	0.32	0.31	0.32	0.30-0.41	0.338	3.02765
Diameter of nucleus	0.075	0.087	0.075	0.075	0.075	0.062 0.087	0.075	0.070	0.070	0.062-0.087	0.075	0.038239
Diameter of first half whorl	0.125	0.145	0.137	0.145	0.137	0.112 0.145	0.145	0.145	0.120	0.112-0.145	0.135	0.007505
Maximum diameter	0.375	0.400	0.462	0.450	0.425	0.400 0.425	0.412	0.412	0.387	0.375-0.462	0.415	0.012285
No. of whorls	2.5	2.5	2.9	2.75	2.4	2.5 2.3	2.45	2.35	2.5	2.3-2.9	2.51,5	0.026844
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	–