MNA Italica 2004_Rauschert dredge_Ross_sea_Mollusca_lgp

Study Extent

This dataset lists the species that have been collected by deploying for the first time a Rauschert dredge in the Ross Sea (Rehm et al. 2006). Samples were obtained during the Austral summer 2004 in the framework of the 19th PNRA Antarctic expedition, on board the R/V “Italica”. The study area was the continental shelf along the latitudinal transect comprised between Cape Adare (~71°S) and Terra Nova Bay (~75°S). On the whole,eighteen stations, comprised between 84 and 515m of depth, were sampled.

Sampling

Sampling activities were done in four main areas of the Ross Sea: Cape Adare, Cape Hallett, Coulman Island, Cape Russell (Fig 2). The eighteen Rauschert dredge samples were obtained at Cape Adare (five sampling sites: A1, A2, A3, A4, A5), at Cape Hallett (seven sampling sites: H out 1, H out 2, H out 4, H in 2, H in 3; H in 4, H in 5), at Coulmann Island (two sites: C1, C2) and at Cape Russell (four sites: SMN, R2, R3, R4) (Rehm et al. 2006).

Quality Control

Specimens were classified at the lowest possible taxonomic level. A 18% of species were classified at the or above the generic level due to an uncertainty about their status. The same was for another 6% of species that potentially represent new species. Although these taxa will require further studies (e.g. morphological and genetic, currently underway) these have been included in this dataset as they could be clearly distinguished during sorting activities and were therefore considered as morphospecies. During all the phases of sorting, classification and storage of samples at the Italian National Antarctic Museum, quality controls and data cleaning have been undertaken at various steps in order to produce quality data and make consistent cross-references between the database and samples' labels. The MNA uses an SQL-based database (Specify 6) to manage its collections and link all the data (photos, sequences, etc.) to the physical samples. Georeferencing on board the RV "Italica" is based on TCP/IP protocols and NetNav2000 and NetNav WEB systems.

Method steps

1. The material was collected during the Italica 2004 LGP Italica 2004 Expedition by Dr. Peter Rehm (see Rehm et al., 2006) under the framework of the PNRA Project 2002/8.6. In the specific, the Rauschert samples were preserved immediately in pre-cooled 90% ethanol and kept in -25°C for later DNA extraction. Sorting of molluscs was performed at the Italian National Antarctic Museum. Taxonomic identification was performed at the Italian Antarctic National Museum (MNA, Section of Genoa) and at the British Antarctic Survey (BAS) laboratories. All living specimens were sorted under a stereomicroscope and, whenever possible, classified down to the specific level. More minute species were photographed at ESEM (Leo Stereoscan 440) facility at DISTAV. Dead shells have not been taken into account in the present study. The present molluscs dataset has been formatted in order to fulfil the standards (Darwin Core) required by the OBIS scheme (http://iobis.org/data/schema-and-metadata) according the SCAR-MarBIN Data Toolkit (available at http://www.scarmarbin.be/documents/SM-FATv1.zip). The dataset was uploaded in the ANTOBIS database (the geospatial component of SCAR-MarBIN) and added to SOMBASE (Southern Ocean Mollusc Database www.antarctica.ac.uk/sombase). SOMBASE generated initial core data system upon which SCAR’s Marine Biodiversity Information Network (SCAR-MarBIN) was built. Taxonomy was matched against the Register of Antarctic Marine Species, using the Taxon Match tool (http://www.scarmarbin.be/rams.php?p=match). Data from both the RV “Italica” and the RV “Tangaroa” (“BioRoss”, TAN0402) voyages were published in Schiaparelli et al. (2006). A detailed analysis of the distribution of mollusc species sampled by the Rauschert dredge as well as the illustration of all new records for the Ross Sea is in Ghiglione et al. (submitted). The dataflow is illustrated in Figure 1.

The present dataset focus on six molluscs classes (Mollusca: Gastropoda, Bivalvia, Monoplacophora, Aplacophora, Polyplacophora and Scaphopoda). In total 8,359 specimens have been collected belonging to 161 species and corresponding to 505 species distributional records. Of these, in order of abundance, 5,965 specimens were Gastropoda (accounting for 113 species), 1,323 were Bivalvia (accounting for 36 species), 949 were Aplacophora (accounting for 7 species), 74 specimens were Scaphopoda (3 species), 38 were Monoplacophora (1 species) and, finally, 10 specimens were Polyplacophora (1 species). This data set represent the first large-scale survey of benthic micromolluscs for the area and provides important information about the distribution of several species which have been seldom or never recorded before in the Ross Sea. A detailed analysis of the distribution of mollusc species sampled by the Rauschert dredge as well as the illustration of all new records for the Ross Sea is in Ghiglione et al. (submitted). The number of newly reported species for the Ross Sea is compared with the available base line, i.e. the SOMBASE records, in Figure 3. The dataset includes respectively for each class:

1. Solenogastres
   rank: class
2. Neomeniidae
   rank: family
3. Polyplacophora
   rank: class
4. Callochitonidae
   rank: family
5. Callochiton
   rank: genus
6. Monoplacophora
   rank: class
7. Micropilinidae
   rank: family
8. Micropilina
   rank: genus
9. Micropilina arntzi
   rank: species
10. Gastropoda
    rank: class
11. Acteonidae
    rank: family
12. Cancellaridae
    rank: family
13. Anatomidae
    rank: family
14. Margaritidae
    rank: family
15. Doridae
    rank: family
16. Eulimidae
    rank: family
17. Mangeliidae
    rank: family
18. Seguenzioidea
    rank: superfamily
19. Calliotropidae
    rank: family
20. Capulidae
    rank: family
21. Newtoniellidae
    rank: family
22. Buccinidae
    rank: family
23. Skeneidae
    rank: family
24. Cylichnidae
    rank: family
25. Diaphanidae
    rank: family
26. Dotidae
    rank: family
27. Eatoniellidae
    rank: family
28. Zerotulidae
    rank: family
29. Lepetidae
    rank: family
30. Naticidae
    rank: family
31. Cerithiopsidae
    rank: family
32. Collonidae
    rank: family
33. Skeneidae
    rank: family
34. Mangellidae
    rank: family
35. Margaritidae
    rank: family
36. Orbitestellidae
    rank: family
37. Triviidae
    rank: family
38. Omalogyridae
    rank: family
39. Volutomitridae
    rank: family
40. Buccinidae
    rank: family
41. Philinidae
    rank: family
42. Raphitomidae
    rank: family
43. Rissoidae
    rank: family
44. Akiodorididae
    rank: family
45. Cingulopsidae
    rank: family
46. Pyramidellidae
    rank: family
47. Tjaernoeiidae
    rank: family
48. Muricidae
    rank: family
49. Mathildidae
    rank: family
50. Borsoniidae
    rank: family
51. Acteon
    rank: genus
52. Admete
    rank: genus
53. Aegires
    rank: genus
54. Anatoma
    rank: genus
55. Antimargarita
    rank: genus
56. Austrodoris
    rank: genus
57. Bathycrinicola
    rank: genus
58. Belalora
    rank: genus
59. Brookula
    rank: genus
60. Calliotropis
    rank: genus
61. Capulus
    rank: genus
62. Cerithiella
    rank: genus
63. Chlanidota
    rank: genus
64. Cirsonella
    rank: genus
65. Cylichna
    rank: genus
66. Diaphana
    rank: genus
67. Doto
    rank: genus
68. Eatoniella
    rank: genus
69. Eumetula
    rank: genus
70. Frovina
    rank: genus
71. Haliella
    rank: genus
72. Hemiaclis
    rank: genus
73. Iothia
    rank: genus
74. Kerguelenatica
    rank: genus
75. Krachia
    rank: genus
76. Leptocollonia
    rank: genus
77. Liotella
    rank: genus
78. Lissotesta
    rank: genus
79. Lorabela
    rank: genus
80. Margarites
    rank: genus
81. Melanella
    rank: genus
82. Microdiscula
    rank: genus
83. Newnesia
    rank: genus
84. Nothoadmete
    rank: genus
85. Notoficula
    rank: genus
86. Omalogyra
    rank: genus
87. Paradmete
    rank: genus
88. Pareuthria
    rank: genus
89. Philine
    rank: genus
90. Pleurotomella
    rank: genus
91. Powellisetia
    rank: genus
92. Probuccinum
    rank: genus
93. Prodoridunculus
    rank: genus
94. Prosipho
    rank: genus
95. Sinuber
    rank: genus
96. Skenella
    rank: genus
97. Streptocionella
    rank: genus
98. Thjaernoeia
    rank: genus
99. Toledonia
    rank: genus
100. Torellia
     rank: genus
101. Trilirata
     rank: genus
102. Trophon
     rank: genus
103. Turritellopsis
     rank: genus
104. Typhlodaphne
     rank: genus
105. Acteon antarcticus
     rank: species
106. Admete haini
     rank: species
107. Aegires albus
     rank: species
108. Anatoma euglypta
     rank: species
109. Antimargarita dulcis
     rank: species
110. Doris kerguelensis
     rank: species
111. Bathycrinicola tumidula
     rank: species
112. Oneopota striatula
     rank: species
113. Brookula pfefferi
     rank: species
114. Brookula cf. argentina
     rank: species
115. Brookula strebeli
     rank: species
116. Calliotropis antartica
     rank: species
117. Capulus subcompressus
     rank: species
118. Cerithiella seymouriana
     rank: species
119. Chlanidota signeyana
     rank: species
120. Cirsonella extrema
     rank: species
121. Cylichna gelida
     rank: species
122. Diaphana paessleri
     rank: species
123. Doto antartica
     rank: species
124. Eatoniella aff. cana
     rank: species
125. Eatoniella cf. demissa
     rank: species
126. Eatoniella kerguelensis
     rank: species
127. Eumetula dilecta
     rank: species
128. Eumetula cf.dilecta
     rank: species
129. Eumetula strebeli
     rank: species
130. Hemiaclis incolorata
     rank: species
131. Iothia emarginuloides
     rank: species
132. Kerguelenatica delicatula
     rank: species
133. Krachia antartica
     rank: species
134. Leptocollonia innocens
     rank: species
135. Lissotesta macnighty
     rank: species
136. Lissotesta mammillata
     rank: species
137. Lissotesta minutissima
     rank: species
138. Lissotesta notalis
     rank: species
139. Lissotesta similis
     rank: species
140. Lissotesta strebeli
     rank: species
141. Lissotesta unifilosa
     rank: species
142. Lorabela davisi
     rank: species
143. Margarites crebrilirulata
     rank: species
144. Margarites refulgens
     rank: species
145. Melanella antartica
     rank: species
146. Melanella convexa
     rank: species
147. Microdiscula vanhoeffeni
     rank: species
148. Newnesia antartica
     rank: species
149. Nothoadmete cf. delicatula
     rank: species
150. Notoficula bouveti
     rank: species
151. Omalogyra burdwoodiana
     rank: species
152. Onoba egorovae
     rank: species
153. Onoba gelida
     rank: species
154. Onoba kergueleni
     rank: species
155. Onoba paucilirata
     rank: species
156. Onoba subantarctica wilkesiana
     rank: species
157. Onoba turqueti
     rank: species
158. Paradmete fragillima
     rank: species
159. Pareuthria plicatula
     rank: species
160. Philine alata
     rank: species
161. Pleurotomella deliciosa
     rank: species
162. Powellisetia deserta
     rank: species
163. Probuccinum tenerum
     rank: species
164. Prodoridunculus gaussianus
     rank: species
165. Prosipho nodosus
     rank: species
166. Antistreptus contrarius
     rank: species
167. Prosipho glacialis
     rank: species
168. Prosipho nodosus
     rank: species
169. Prosipho mundus
     rank: species
170. Sinuber microstriatum
     rank: species
171. Skenella paludinoides
     rank: species
172. Streptocionella pluralis
     rank: species
173. Thjaernoeia micaeli
     rank: species
174. Toledonia cf. perplexa
     rank: species
175. Toledonia elata
     rank: species
176. Toledonia globosa
     rank: species
177. Toledonia limnaeaeformis
     rank: species
178. Toledonia major
     rank: species
179. Toledonia palmeri
     rank: species
180. Toledonia punctata
     rank: species
181. Toledonia striata
     rank: species
182. Torellia antartica
     rank: species
183. Torellia exilis
     rank: species
184. Trilirata macmurdensis
     rank: species
185. Trilirata sexcarinata
     rank: species
186. Trophon coulmanensis
     rank: species
187. Trophon minutus
     rank: species
188. Turritellopsis latior
     rank: species
189. Typhlodaphne innocentia
     rank: species
190. Bivalvia
     rank: class
191. Philobryidae
     rank: family
192. Astartidae
     rank: family
193. Cuspidariidae
     rank: family
194. Cyamiidae
     rank: family
195. Carditidae
     rank: family
196. Cyclochlamydidae
     rank: family
197. Propeamussiidae
     rank: family
198. Mytilidae
     rank: family
199. Kelliidae
     rank: family
200. Limidae
     rank: family
201. Limopsidae
     rank: family
202. Philibryidae
     rank: family
203. Lyonsiidae
     rank: family
204. Montacutidae
     rank: family
205. Poromyidae
     rank: family
206. Nuculanidae
     rank: family
207. Siliculidae
     rank: family
208. Cuspidariidae
     rank: family
209. Thraciidae
     rank: family
210. Thyasiridae
     rank: family
211. Galeommatoidea
     rank: family
212. Yoldiidae
     rank: family
213. Adacnarca
     rank: genus
214. Astarte
     rank: genus
215. Cuspidaria
     rank: genus
216. Cyamiomactra
     rank: genus
217. Cyclocardia
     rank: genus
218. Cyclochlamys
     rank: genus
219. Cyclopecten
     rank: genus
220. Dacrydium
     rank: genus
221. Kellia
     rank: genus
222. Limatula
     rank: genus
223. Limopsis
     rank: genus
224. Lissarca
     rank: genus
225. Lyonsia
     rank: genus
226. Montacuta
     rank: genus
227. Mysella
     rank: genus
228. Parathyasira
     rank: genus
229. Philobrya
     rank: genus
230. Poromya
     rank: genus
231. Propeleda
     rank: genus
232. Pseudokellya
     rank: genus
233. Silicula
     rank: genus
234. Subcuspidaria
     rank: genus
235. Thracia
     rank: genus
236. Waldo
     rank: genus
237. Yoldiella
     rank: genus
238. Adacnarca nitens
     rank: species
239. Astarte longirostris
     rank: species
240. Cuspidaria tenella
     rank: species
241. Cuspidaria kerguelensis
     rank: species
242. Cyamiomactra laminifera
     rank: species
243. Cyamiomactra robusta
     rank: species
244. Cyclocardia astartoides
     rank: species
245. Cyclochlamys gaussianus
     rank: species
246. Cyclochlamys pteriola
     rank: species
247. Dacrydium albidum
     rank: species
248. Kellia simulans
     rank: species
249. Limatula hodgsoni
     rank: species
250. Limatula ovalis
     rank: species
251. Limatula simillima
     rank: species
252. Limopsis liliei
     rank: species
253. Limopsis marionensis
     rank: species
254. Lissarca notorcadensis
     rank: species
255. Lyonsia arcaeformis
     rank: species
256. Montacuta nimrodiana
     rank: species
257. Mysella cf. antartica
     rank: species
258. Mysella charcoti
     rank: species
259. Mysella gibbosa
     rank: species
260. Philobrya sublaevis
     rank: species
261. Philobrya wandelensis
     rank: species
262. Poromya spinosula
     rank: species
263. Propeleda longicaudata
     rank: species
264. Pseudokellya gradata
     rank: species
265. Silicula rouchi
     rank: species
266. Thracia meridionalis
     rank: species
267. Parathyasira dearborni
     rank: species
268. Thyasira debilis
     rank: species
269. Waldo parasiticus
     rank: species
270. Yoldiella antarctica
     rank: species
271. Fusceulima
     rank: genus
272. Scaphopoda
     rank: class
273. Pulsellidae
     rank: family
274. Gadilidae
     rank: family
275. Pulsellum
     rank: genus
276. Siphonodentalium
     rank: genus
277. Siphonodentalium dalli
     rank: species

Antarctica, Ross Sea, Victoria Land Coast