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 13. — Measurements of teleoconch and protoconch of Benthonellania lozoueti n. sp. in mm, with range, mean and standard deviation: 1, holotype, Marquesas,Fatu Hiva, 1015-1020 m depth; 2-5, paratypes, Marquesas, Fatu Hiva,1015-1020 m depth; 6, 7, Marquesas:Eiao CP1278, 1000 m depth; 8, 9, Marquesas, Fatu Hiva DR1247, 1150-1250 m depth; 10, subadult, Marquesas, Eiao DW1275, 627 m depth.| Teleoconch | 1 | 2 | 3 4 | 5 | 6 | 7 | 8 | 9 | 10 | Min-max | Mean | Std |
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| Heigth | 3.86 | 4.45 | 3.60 4.30 | 3.40 | 3.30 | 3.50 | 3.70 | 3.75 | 2.35 | 2.35-4.45 | 3.621 | 0.578378 |
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| Width | 2.60 | 2.75 | 2.15 2.65 | 2.12 | 2.17 | 2.20 | 2.25 | 2.5 | 1.60 | 1.60-2.75 | 2.299 | 0.33818 |
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| Height/Width ratio | 1.484 | 1.618 | 1.674 1.622 1.603 | 1.520 | 1.590 | 1.644 | 1.500 | 1.468 | 1.468-1.674 | 1.5723 | 0.072981 |
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| Aperture heigth | 1.75 | 1.90 | 1.50 1.90 | 1.50 | 1.55 | 1.40 | 1.67 | 1.60 | 1.17 | 1.17-1.90 | 1.594 | 0.224707 |
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| Height/Height aperture ratio | 2.205 | 2.342 | 2.400 2.263 2.266 | 2.129 | 2.500 | 2.215 | 2.343 | 2.008 | 2.008-2.500 | 2.2671 | 0.139869 |
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| Height last whorl | 2.80 | 3.0 | 2.45 2.85 | 2.30 | 2.30 | 2.27 | 2.55 | 2.55 | 1.70 | 1.70-3.0 | 2.477 | 0.370826 |
|---|
| Height/Height last whorl ratio | 1.378 | 1.483 | 1.469 1.508 1.478 | 1.434 | 1.541 | 1.450 | 1.470 | 1.382 | 1.378-1.541 | 1.4593 | 0.051075 |
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| No. of whorls | 4 | 4.5 | 3.8 4.3 | ? | 3.75 | 4.2 | 3.9 | 4.2 | 3.2 | 3.2-4.5 | 3.983333 0.382426 |
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| No. axial ribs on last whorl | 26 | 27 | 23 27 | 22 | 20 | 24 | 20 | 19 | 16 | 16-27 | 22.4 | 3.687818 |
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| No. spiral cords on last whorl | 7 | 6 | 4 7 | 7 | 7 | 5 | 6 | 9 | 3 | 3-9 | 6.1 | 1.72884 |
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| Varix | no | no | no no | no | no | no | no | no | no | no | no | – |
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| Umbilical false chink | yes | yes | yes yes | yes | yes | yes | yes | yes | yes | yes | yes | – |
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| Protoconch | 1 | 2 | 3 4 | 5 | 6 | 7 | 8 | 9 | 10 | Min-max | Mean | Std |
|---|
| Heigth | 0.350 | 0.337 | 0.312? | ? | 0.350 | 0.325 | ? | 0.350 | 0.325 | 0.312–0.350 | 0.335571 0.015306 |
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| Diameter of nucleus | 0.100 | 0.087 | 0.100? | ? | 0.100 | 0.100 | 0.120 | 0.100 | 0.100 | 0.087–0.120 | 0.100875 0.008967 |
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| Diameter of first half whorl | 0.175 | 0.150 | 0.162? | ? | 0.162 | 0.187 | 0.212 | 0.187 | 0.187 | 0.150–0.212 | 0.17775 0.019652 |
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| Maximum diameter | 0.412 | 0.437 | 0.425? | ? | 0.412 | 0.375 | ? | 0.412 | 0.387 | 0.375–0.437 | 0.408571 0.021236 |
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| No. of whorls | 2 | 2.25 | 2.6? | ? | 2.2 | 1.8 | ? | 1.8 | 1.8 | 1.8–2.6 | 2.064286 0.303746 |
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| Multispiral | yes | yes | yes yes | yes | yes | yes | yes | yes | yes | yes | yes | – |
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| Paucispiral | no | no | no no | no | no | no | no | no | no | no | no | – |
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