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Gromia

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An oral complex containing an aperture (an opening in the test) allows the filose pseudopodia to extend out. The pseudopodia are non-granular, and can form connections to make net-like structures. Gromia use their pseudopodia to crawl along the surface of sediments. Waste pellets (“stercomata”) and
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Deep-sea gromiids have been found in the Arabian sea, off the coast of Antarctica and in the water of the Northwest Atlantic Ocean. They were often collected from the 1,000–3,100 m range. Oxygen levels in gromiid habitats tend to exceed 0.2 mL/L and are therefore not limiting to the
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Gromiids are hypothesized to be important for carbon cycling, as they are often found in carbon-rich sediments and feed on detritus. In addition, gromiids have been shown to store high levels of intracellular nitrate, suggesting a role for gromiids in denitrification.
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protists were later described in waters from the Arabian sea, the European Arctic sea, and off the coast of Antarctica, among other locations, and characterized both morphologically and through molecular studies of their small subunit rRNA genes.
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Gromiids found in the deep sea near Oman and Pakistan are often found with Foraminifera, filamentous prokaryotes and bacteria living on their cell surface. Gromiids provide substrates and serve as a surface for attachment to their epibionts.
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are thought to acquire nutrients from the organic matter in sediments on the sea floor, as they are often found in areas with abundant phytodetritus. Their apertures face down on sediment surfaces and they use their pseudopodia to feed.
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through a gap enclosed by the cell's oral capsule. The test, a shell made up of protein that encloses the cytoplasm, is made up of several layers of membrane, which resemble honeycombs in shape – a defining character of this genus.
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species, and their morphology tends to align with the molecular data used to differentiate species. The interior of the test is layered with membranes with a honeycomb pattern. These honeycomb membranes are a unique feature of
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to produce tracks on the sea floor has been used to propose a re-evaluation of the use of fossils with similar traces as evidence for dating the origins of animals with bilateral symmetry.
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class, again based on SSU rRNA genes Eventually, when molecular studies combined data from several genes – actin, polyubiquitin, RNA polymerase II and small subunit rRNA genes –
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Longet, D.; Burki, F.; Flakowski, J.; Berney, C.; Polet, S.; Fahrni, J.; Pawlowski, J. (2004). "Multigene evidence for close evolutionary relations between
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were long thought to only inhabit shallow waters, until samples from the Arabian Sea from depths below 1,000 m revealed the first deep-sea gromiid –
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Cifelli, R. (1990). "A history of the classification of foraminifera (1826-1933), part 1 Foraminiferal classification from d'Orbigny to Galloway".
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became better characterized throughout the 1960s, when electron microscopy revealed more details on their morphology, including their honeycomb
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Gromiids inhabit sediments or surfaces of flora in both shallow waters and the deep sea. The best characterized species of shallow-water
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members are quite large, ranging from 0.4 mm to 30 mm. Their proteinaceous tests vary in shapes, from spherical (e.g.
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Gromiids have also enriched our understanding of evolutionary history. The ability of the giant, deep-sea species
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revealed that it produces traces on the seafloor which resemble fossil traces formerly attributed to early
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Cavalier-Smith, T.; Chao, E.E.-Y. (2003). "Phylogeny and classification of phylum Cercozoa (Protozoa)".
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have been observed to undergo both asexual and sexual reproduction. In sexual reproduction observed in
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gaining prominence because it was often found in the intertidal zones on the British coast. Initially,
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Felts, W.J.L.; Harrison, R.J. (1968). "International review of general and experimental zoology".
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Benthic protozoan community attributes in relation to environmental gradients in the Arabian Sea
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were first discovered in shallow waters, with members of the best-characterized species
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Gooday, A.J.; Bowser, S.S.; Bett, B.J.; Smith, C.R. (2000). "A large testate protist,
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Høgslund, S.; Cedhagen, T.; Bowser, S.S.; Risgaard-Petersen, N. (April 2017).
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mineral grains accumulate inside the cell – another characteristic feature of
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organisms’ growth. The temperature tolerance of deep-sea Gromia is uncertain.
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Matz, M.V.; Frank, T.M.; Marshall, N.J.; Widder, E.A.; Johnsen, S. (2008).
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Aranda da Silva, A.; Gooday, A.J. (2009). "Large organic-walled Protista (
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Hedley, R.H.; Bertaud, W.S. (1962). "Electron-microscopic observations of
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from the Arabian Sea revealed by small subunit rDNA sequence analysis"
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has been shown to tolerate a temperature range of 0–30 Â°C.
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Arnold, Z.M. (1966). "Observations on the sexual generation of
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Deep Sea Research Part II: Topical Studies in Oceanography
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Deep-Sea Research Part II: Topical Studies in Oceanography
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Rothe, N.; Gooday, A.J.; Cedhagen, T.; Hughes, J. Alan (2011).
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Aranda da Silva, A.; Pawlowski, J.; Gooday, A.J. (2006).
594:(Protista, Rhizaria) in the deep Weddell Sea (Southern Ocean)" 186:, which inhabit marine and freshwater environments. It is the 688: 686: 742: 740: 257:
Deep-sea gromiids have also been shown to be important for
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sp. nov. (order Filosea), from the bathyal Arabian Sea".
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or Filosea, as noted in a review by Cifelli (1990).
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often found inhabiting rock surfaces, sediments, or
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Test shape is often used for classifying 182:is a genus of protists, closely related to 2266: 1988: 1977: 1881: 1870: 1866: 1853: 1743: 1736: 1725: 1613: 1578: 1545: 1509: 1499: 1488: 1441: 1434: 1423: 1338: 1328: 1315: 1182: 1168: 1160: 42: 31: 720: 710: 658: 1110:World Register of Marine Species (WoRMS) 237:species being described and recognized. 565: 276:were first described in the 1835, with 240:A recent study of the deep-sea species 300:The first molecular studies involving 556:Gooday, Bowser, Bett & Smith 2000 7: 2530:57c2f918-aeab-46c7-b325-8860ae199ff7 2399:27884a44-33b0-41fd-af7d-9500e7368c96 1080:10.1111/j.1550-7408.1966.tb01863.x 814:10.1111/j.1550-7408.1962.tb02585.x 320:was shown to be a sister group to 25: 344:. Additional species of deep-sea 67: 1: 966:10.1016/S0967-0645(99)00100-9 324:. Moreover, within the genus 1026:da Silva, A.A. (2005). 899:"High diversity of deep-sea 284:were regarded as members of 1068:The Journal of Protozoology 802:The Journal of Protozoology 757:World Foraminifera Database 2600: 1010:10.1016/j.dsr2.2008.12.027 873:10.1078/143446103322454112 476:Brooks & Kellner, 1908 2215: 1976: 1869: 1852: 1724: 1612: 1544: 1512: 1487: 1422: 1314: 1198: 919:10.1007/s00227-005-0071-9 699:Frontiers in Microbiology 660:10.1016/j.cub.2008.10.028 613:10.1007/s00300-010-0859-z 64:Scientific classification 62: 50: 41: 34: 712:10.3389/fmicb.2017.00617 473:Gromia appendiculariae 2420:Paleobiology Database 1142:UniversitĂ© de Genevè 439:Practical importance 401:G. pyriforminis 2228:organization type: 1002:2009DSRII..56..422A 958:2000DSRII..47...55G 842:Acta Protozoologica 353:Habitat and ecology 205:, producing filose 1862:    1858:    1045:Journal of Anatomy 532:Schlumberger, 1845 2566: 2565: 2538:Open Tree of Life 2407:Open Tree of Life 2272:Taxon identifiers 2263: 2262: 2246:heliozoan amoebae 2238:amoeboflagellates 2202:Labyrinthomyxidae 2176: 2175: 2172: 2171: 2168: 2167: 2164: 2163: 2121:Globigerinitoidea 1972: 1971: 1968: 1967: 1848: 1847: 1844: 1843: 1807: 1806: 1720: 1719: 1716: 1715: 1712: 1711: 1708: 1707: 1704: 1703: 1700: 1699: 1696: 1695: 1631:Phaeogymnocellida 1608: 1607: 1604: 1603: 1540: 1539: 1527:Paracercomonadida 1483: 1482: 1418: 1417: 653:(23): 1849–1854. 489:Gromia dujardinii 397:G. oviformis 367:G. oviformis 363:G. oviformis 306:G. oviformis 278:G. oviformis 175: 174: 171: 152: 27:Genus of protists 16:(Redirected from 2591: 2559: 2558: 2546: 2545: 2533: 2532: 2523: 2522: 2510: 2509: 2497: 2496: 2484: 2483: 2482: 2469: 2468: 2467: 2441: 2440: 2428: 2427: 2415: 2414: 2402: 2401: 2392: 2391: 2379: 2378: 2366: 2365: 2353: 2352: 2340: 2339: 2327: 2326: 2314: 2313: 2312: 2299: 2298: 2297: 2267: 2055:Silicoloculinida 1989: 1985: 1978: 1882: 1878: 1871: 1867: 1863: 1854: 1834:Plasmodiophorida 1744: 1737: 1733: 1726: 1614: 1591:Thaumatomonadida 1579: 1546: 1510: 1500: 1496: 1489: 1442: 1435: 1431: 1424: 1339: 1329: 1325: 1316: 1227: 1207: 1184: 1177: 1170: 1161: 1156: 1154: 1153: 1144:. Archived from 1122: 1121: 1119: 1117: 1098: 1092: 1091: 1064:Gromia oviformis 1059: 1053: 1052: 1040: 1034: 1033: 1023: 1014: 1013: 996:(6–7): 422–433. 981: 970: 969: 942:Gromia sphaerica 937: 931: 930: 894: 885: 884: 867:(3–4): 341–358. 856: 850: 849: 829: 818: 817: 798:Gromia oviformis 793: 787: 786: 774: 768: 767: 765: 763: 744: 735: 734: 724: 714: 690: 681: 680: 662: 638: 625: 624: 598: 585: 553:Gromia sphaerica 540:Cienkowski, 1876 521:Gromia granulata 513:Gromia solenopus 505:Gromia granulata 497:Gromia fluvialis 465:Gromia oviformis 341:Gromia sphaerica 304:, which sampled 297: 269:History of study 243:Gromia sphaerica 223:Gromia oviformus 166: 150: 72: 71: 46: 32: 21: 2599: 2598: 2594: 2593: 2592: 2590: 2589: 2588: 2579:Rhizaria genera 2569: 2568: 2567: 2562: 2554: 2549: 2541: 2536: 2528: 2526: 2518: 2513: 2505: 2500: 2492: 2487: 2478: 2477: 2472: 2463: 2462: 2457: 2444: 2436: 2431: 2423: 2418: 2410: 2405: 2397: 2395: 2387: 2382: 2374: 2369: 2361: 2356: 2348: 2343: 2335: 2330: 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Index

Gromiidae

foraminiferans
Scientific classification
Edit this classification
Eukaryota
Diaphoretickes
SAR
Endomyxa
Gromiidea
Gromiida
Gromiidae
Gromia
Dujardin
foraminifera
only genus
family
ameboid
pseudopodia
test
Gromia oviformus
seaweed
holdfasts
Gromia sphaerica
Bilateria
Precambrian
carbon cycling
denitrification
Foraminifera
Gromiidea

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