Leitoscoloplos kerguelensis ( McIntosh, 1885 )

Blake, James A., 2017, Polychaeta Orbiniidae from Antarctica, the Southern Ocean, the Abyssal Pacific Ocean, and off South America, Zootaxa 4218 (1), pp. 1-145 : 23-26

publication ID

https://doi.org/ 10.5281/zenodo.245827

publication LSID

lsid:zoobank.org:pub:9345C596-8656-4B5C-AD8C-2FACF4E9240C

DOI

https://doi.org/10.5281/zenodo.4901749

persistent identifier

https://treatment.plazi.org/id/8F2387DD-0603-0914-FF31-FF7CFF2FFA5F

treatment provided by

GgServerImporter (2017-01-15 18:49:37, last updated 2024-11-28 21:33:25)

scientific name

Leitoscoloplos kerguelensis ( McIntosh, 1885 )
status

 

Leitoscoloplos kerguelensis ( McIntosh, 1885) View in CoL

Figures 8 View FIGURE 8 , 9 View FIGURE 9 A–E

Scoloplos kerguelensis McIntosh, 1885: 355 View in CoL , pl. 43, figs. 6–8, pl. 22A, fig. 19; Ehlers 1897: 97; 1901: 169: 1913: 522; Gravier 1911: 108, pl. 5, figs. 60–63; Augener 1932a: 41. Not Fauvel 1916: 433, pl. 8, figs. 23–35; 1932: 165; 1953: 307–308, fig. 160 a–c.

Haploscoloplos kerguelensis: Monro 1939: 124 View in CoL (in part); Hartman 1957: 275 –276, figs. 1–3; 1966: 9–10, pl. 2, figs. 1–2; 1967: 104 (in part, not Eltanin Sta. 311, 428, 558, 732, 1003, 1009, 1063 and Staten Island Sta. 63-32, 63-63); 1978: 156 (in part, not Glacier Sta. 68-18, 68-55, 69-1; part of 68-1); Bellan 1972: 76; 1975: 789; Arnaud 1974: 552, 563, 638; Averincev 1982: 25 –26, figs. 19–21, pl. III, figs. 6–8, table.

Haploscoloplos kerguelensis minutus Hartman, 1953: 37 View in CoL , figs. 11a–c; Hartmann-Schröder 1965: 194.

Haploscoloplos minutus: Hartman 1978: 156 View in CoL (in part). New synonymy.

Leitoscoloplos kerguelensis: Hartmann-Schröder & Rosenfeldt 1988: 53 View in CoL (in part); 1990: 105–106 (in part); Mackie 1987: 3 –4, fig. 2.

Leitoscoloplos kerguelensis minutus: Mackie 1987: 4 View in CoL –5, Fig. 3 View FIGURE 3 . New synonymy.

Leitoscoloplos banzareae Mackie 1987: 8 View in CoL , fig. 7. New synonymy.

Material examined. Chile, South Pacific Ocean , W of Isla Guafo, R /V Vema Sta. V-17 - 10, 397- 501 m, (2, LACM- AHF Poly 5038).—Straits of Magellan, R/V Vema Sta. V-17-18, 248- 262 m (2, LACM-AHP Poly 5002); East of Isla Dawson, R/V Vema Sta. V-17-23, 273 280 m (3, LACM-AHF Poly 5003).— South Atlantic , SE of Falkland Islands, R/V Vema Sta. V- 14 - 12, 361 m (1, LACM-AHF Poly 5029).—N of South Georgia, Eltanin Sta. 9-732, 220 – 265 m (1, USNM 56507); Sta. 9-734, 1299– 1400 m (1, USNM 56508 About USNM ).— South Georgia, off Cumberland Bay , 54°11′S, 36°18′W, Swedish Antarctic Expedition, Sta GoogleMaps . 34, 252– 310 m, syntype of Haploscoloplos kerguelensis minutus (SMNH 3703). — East Antarctic Peninsula , Prince Gustav Channel, RVIB Nathaniel B. Palmer, Station NBP-35, 64°10.471′S, 058°505′W, 25 May 2000, Smith McIntyre grab, 651 m, (1, JAB) South Orkney Islands, Eltanin Sta. 7-500, 489– 490 m (1, USNM 56505 About USNM ) ; Sta. 14-1079, 593– 598 m (1, USNM 56525); Sta. 12-1082, 298– 302 m (2, USNM 56526); Sta. 12-1084, 298– 403 m (12, USNM 56527).— South Shetland Islands, Hero Sta. 721- 726 (1, USNM 60170 About USNM ) ; Sta. 721-742 (2, USNM 60169); Sta. 721-758 (2, USNM 60172); Sta. 721-964 (1, USNM 60166); Sta. 721-972 (3, USNM 60158); Sta. 1032 (1, USNM 60167); Eltanin Sta. 6-418, 311– 426 m (1, USNM 56501); Eastwind Sta. 0 44, 19 Feb 1966, 62°11′S, 57°49.5′W, 747 m, coll. D. Pawson and D. Squires (1, USNM 69350); off Smith Island, R/V Vema Sta. V-17-43, 21 Apr 1961, 655– 673 m (9, LACM-AHF-Poly 5037).— Bransfield Strait, Eltanin Sta. 6-410, 220 – 240 m (14, USNM 56521); Sta. 6-428, (1, USNM 56502); Sta. 6-437, 267– 311 m (5, USNM 56503). — West Antarctic Peninsula , Hero Sta. 1120 (26, USNM 69381 About USNM ) ; Eltanin Sta. 5-272 (1, USNM 56499); Sta. 6-439 (8, USNM 56504); off Adelaide Island, Eastwind Sta. 004A, 24 Jan 1966, 67°53′S, 069°10′30″W, 330 m, coll. D. Pawson and D. Squires (12, USNM 69349 About USNM ) GoogleMaps .— Ross Sea, McMurdo Sound, W of Inaccessible Island, Deep-Freeze II, Glacier Sta. 2, 420 m (2, USNM 1013658 About USNM ).—Weddell Sea, Glacier Sta . 68- 1, 650 m (12 USNM 46601); Sta. 69- 8, 585 m (2, USNM 46605).

Description. A moderate-sized species, up to 30 mm long and 2 mm wide for about 100 setigers; average size 14 mm long and 0.9 mm wide for about 65 setigers. Color in alcohol: brown. Thoracic region inflated, not depressed, with 8–10 setigers, slightly wider than abdominal region ( Figs. 8 View FIGURE 8 A, 9A).

Prostomium short, conical, pointed, but not acute on tip ( Fig. 8 View FIGURE 8 A); two nuchal slits sometimes apparent in dorsolateral locations; without eyespots. Peristomium a single achaetous ring, twice as long as setiger 1 ( Fig. 8 View FIGURE 8 A).

Thoracic parapodia all similar, inconspicuous; notopodia with short, triangular-shaped postsetal lobes, narrow at first, then becoming thicker in last thoracic setigers ( Figs. 8 View FIGURE 8 B, 9A); neuropodia with papillate postsetal lobe arising from basal cushion ( Fig. 8 View FIGURE 8 B). Abdominal notopodia with thin, narrow, fingerlike postsetal lobes and single, thickened, elongated neuropodia ( Figs. 8 View FIGURE 8 C, 9C–D), sometimes with apical notch, never strongly bifurcated ( Fig. 8 View FIGURE 8 C). Subpodial flange small, but inflated, continuous with neuropodial lobe ( Figs. 8 View FIGURE 8 C, 9C–D).

Branchiae from setiger 13–17, short at first, increasing in length posteriorly. Branchiae more or less symmetrical, sometimes curved towards dorsal mid-line ( Fig. 8 View FIGURE 8 C).

Thoracic setae including crenulated capillaries; neurosetae arising from broad cushion, in two rows, with some capillaries of first row short, thin, straight; setae of second row longer, thicker, and curved ( Fig. 9 View FIGURE 9 B); notosetae similarly arranged. Abdominal notosetae including crenulated capillaries and furcate setae; in light microscope, furcate setae observed with unequal tynes connected by membrane of fine needles ( Fig. 8 View FIGURE 8 D–E), with SEM 7–8 needles observed, individually with sharp tapering tips, lateral needles merging with tynes; tips of tynes expanded, with distinct apical opening ( Fig. 9 View FIGURE 9 E). Abdominal neurosetae thin, weakly crenulated; aciculae sometimes with tip emergent.

Pygidium a simple ring, lacking cirri ( Fig. 9 View FIGURE 9 D).

Remarks. Leitoscoloplos kerguelensis belongs to a group of species with branchiae from anterior abdominal setigers. This species includes individuals having 8–10 thoracic setigers and branchiae from setiger 13–17. Specimens having branchiae from earlier setigers or from setiger 18 or more posteriorly are here referred to other species (see below). There are numerous records of L. kerguelensis globally, but the species is here restricted to sub-Antarctic and Antarctic locations; some Antarctic and sub-Antarctic records are referred to other species. Leitoscoloplos kerguelensis has, rather than lacks furcate setae (as sometimes stated) and the prostomium is more elongate than its closest relatives. In Antarctica , L. kerguelensis is most closely related to L. geminus and L. mawsoni , differing primarily in having branchiae from setiger 13–17 instead of 10–12. There are further differences in details of the abdominal neuropodia, shape of the posterior branchiae, and general shape of the prostomium. There may also be important differences in details of the structure of the furcate setae, but further study is needed. However, all three species are similar and separated with difficulty. Both L. geminus and L. mawsoni are limited to relatively shallow waters, ca. 0–200 m, whereas L. kerguelensis has been collected from the intertidal to 1400 m, and occurs frequently in samples along the Antarctic Peninsula from 500– 600 m.

Leitoscoloplos banzareae View in CoL agrees well with L. kerguelensis View in CoL and is here placed in synonymy. Mackie (1987) stated that the thoracic region of L. kerguelensis View in CoL contained 8–9 setigers compared to 10 for L. banzareae View in CoL . In the much larger collection of L. kerguelensis View in CoL examined here, thoracic regions with 10 setigers have been seen, thus overlapping with the stated differences with L. banzareae View in CoL . Furthermore, the first occurrence of branchiae on L. banzareae View in CoL is 14–15 according to Mackie (1987), within the range of 13–17 for L. kerguelensis View in CoL .

Haploscoloplos kerguelensis minutus View in CoL was originally distinguished from the stem species on the basis of its smaller size ( Hartman, 1953). It was elevated to full species status by Hartman (1978). The present collections contain mature specimens that overlap the size ranges of both the stem form and the subspecies. For that reason and the lack of any other distinguishing features, H. minutus View in CoL is referred to synonymy with L. kerguelensis View in CoL .

Many of the published records of L. kerguelensis View in CoL from Antarctica View in CoL probably include a mixture of species. For example, records of L. kerguelensis View in CoL by Hartmann-Schröder & Rosenfeldt (1988, 1990) from the Antarctic Peninsula and Elephant Island appear to be a mixture of L. kerguelensis View in CoL and L. geminus View in CoL because branchiae are reported to begin from setigers 10–14.

Scoloplos kerguelensis sensu Fauvel (1916) View in CoL from the Falkland Islands has branchiae from setiger 18–20 and is likely an undescribed species. The records of S. kerguelensis View in CoL from India by Fauvel (1932; 1953) refer to yet another unknown species because the thorax consists of 12–19 setigers and branchiae begin from setiger 20–22.

Haploscoloplos kerguelensis sensu Ramos (1976) View in CoL from the eastern Mediterranean is another undescribed species having eight thoracic setigers, branchiae from setiger 14, bilobed neuropodia, and furcate setae. Haploscoloplos kerguelensis sensu Fauchald (1972) View in CoL from deep water off Western Mexico differs from typical shallower forms in having a distinct postsetal lobe on abdominal neuropodia, and is most certainly an unnamed species. Haploscoloplos kerguelensis sensu Okuda (1937 View in CoL ; 1938; 1939; 1946) is believed to represent another undescribed species.

Leitoscoloplos normalis View in CoL from Australia is closely related to L. kerguelensis View in CoL , but differs in having a distinctly bilobed abdominal neuropodium in which the inner lobe is considerably longer than the outer one ( Day, 1977: 224– 225, fig. 1C).

Biology. Despite being one of the most common orbiniids in Antarctica and certain subantarctic locations, little information is available on the biology of this species. Averincev (1982) identified Leitoscoloplos kerguelensis (as Haploscoloplos ) from shallow sites in the Davis Sea, an area off the coasts of Queen Mary Land and Wilhelm II Land, between the Shackleton Ice Shelf and the West Ice Shelf. Russian scientists have maintained research facilities in the area since the 1960s. As part of annual collections from subtidal collections in depths of 3– 45 m, Averincev (1982) concluded that the life cycle of this species was short with a one-time recruitment in January–February and a life span of approximately one year. Abundance and biomass ranged from 10– 400 specimens per m2 with a biomass of 0.12 to 4 g /m2.

Distribution. Widespread in Antarctic and subantarctic seas: Strait of Magellan, South Georgia, Kerguelen Islands, South Orkney Islands; South Shetland Islands; Antarctic Peninsula; Ross Sea; Weddell Sea. Intertidal to 1400 m.

Arnaud, P. M. (1974) Contribution a la bionomie marine benthique des regions Antarctiques et Subantarctiques. Tethys, 6, 471 - 653.

Augener, H. (1932 a) Zoologische Ergebniise der Reisen von Dr. Kohl-Larsen nach den Subantarktischen Inseln bei Neuseeland und nach Sudgeorgien. Polychaeten. Senckenbergiana, Frankfurt, 14, 95 - 117, 1 figure.

Averincev, V. G. (1982) Seasonal variations in the sublittoral polychaete fauna of the Davis Sea. Issledovaniya fauny morei, Academyia Nauk, SSSR. [Explorations of the Fauna of the Seas, Academy of Sciences of the USSR], 28 (36), 4 - 70. [In Russian with English abstract]. [Translated into English by the Multilingual Services Division, Ottawa, Canada, August, 1989, 101 pp.]

Bellan, G. (1972) Invertebrates marin des XII e et XV e Expeditions Antarctiques Francaises en Terre Adelie 4. - Polychetes des Terre Australes en Antarctiques Francaises, 1. Tethys, 4, 61 - 82.

Day, J. H. (1977) A review of the Australian and New Zealand Orbiniidae (Annelida: Polychaeta). In: Reish, D. J. & Fauchald, K. (Eds.), Essays on Polychaetous Annelids in Memory of Dr. Olga Hartman, pp. 217 - 246. [Allan Hancock Foundation, University of Southern California, Los Angeles.]

Ehlers, E. (1897) Polychaeta. In, Hamburger Magalhaenischen Sammelreise, 148 pp. [9 plates, Friedrichsen & Co., Hamburg.]

Fauchald, K. (1972) Benthic polychaetous annelids from deep water off western Mexico and adjacent areas in the eastern Pacific Ocean. Allan Hancock Monographs in Marine Biology, 7, 1 - 575, 69 plates.

Fauvel, P. (1916) Annelides polychetes des Iles Falkland recuellies par M. Rupert Valentin Esqre (1902 - 1910). Archives de Zoologie Experimentale et Generale, 55, 417 - 482, plates 8 - 9.

Fauvel, P. (1932) Annelida Polychaeta of the Indian Museum, Calcutta. Memoirs of the Indian Museum, Calcutta, 12, 1 - 262, 9 plates, 4 text figures.

Fauvel, P. (1953) Annelida Polychaeta. The fauna of India, including Pakistan, Ceylon, Burma and Malaya, pp. i - xii, 1 - 507, 250 figures, Indian Press, Allahabad.

Gravier, C. (1911) Annelides polychetes recueillis par la seconde expedition antarctique francaise (1908 - 1910). Deuxieme expedition antarctique francaise, 1, 1 - 165, plates, 1 - 12.

Hartman, O. (1953) Non-pelagic Polychaeta of the Swedish Antarctic Expedition 1901 - 1903. Zoological Results of the Swedish Antarctic Expedition 1901 - 1903, 4 (11), 1 - 83, 21 figures, 1 chart.

Hartman, O. (1957) Orbiniidae, Apistobranchidae, Paraonidae and Longosomidae. Allan Hancock Pacific Expeditions, 15 (3), 211 - 393, plates 20 - 44, 1 chart.

Hartman, O. (1978) Polychaeta from the Weddell Sea Quadrant, Antarctica. Antarctic Research Series, 26 (4), 125 - 223. [42 figures. American Geophysical Union, Washington, D. C.]

Hartmann-Schroder, G. (1965) Die Polychaeten des Sublitorals. In: Hartmann-Schroder, G. und Hartmann, G., (Eds), Zur Kenntnis des Sublitorals der chilenischen Kuste unter besonderer Beruchsichtigung der Polychaeten und Ostracoden. Mitteilungen des Hamburgischen Zoologischen Museums und Instituts, Supplement, 62, 59 - 305, 300 figures.

Hartmann-Schroder, G. & Rosenfeldt, P. (1988) Die Polychaeten der Polarstern - Reise ANT III / 2 in die Antarktis 1984. Teil 1: Euphrosinidae bis Chaetopteridae. Mitteilungen des Hamburgischen Zoologischen Museums und Instituts, Supplement, 85, 5 - 72.

Hartmann-Schroder, G. & Rosenfeldt, P. (1990) Die Polychaeten der Walther Herwig - Reise 68 / 1 nach Elephant Island (Antarktis) 1985 Teil 1: Aphroditidae bis Cirratulidae. Mitteilungen des Hamburgischen Zoologischen Museums und Instituts, Supplement, 87, 89 - 122.

Mackie, A. S. Y. (1987) A review of the species currently assigned to the genus Leitoscoloplos Day, 1977 (Polychaeta: Orbiniidae), with descriptions of species newly referred to Scoloplos Blainville, 1828. Sarsia, 72, 1 - 28, 24 figures.

McIntosh, W. C. (1885) Report on the Annelida Polychaeta collected by H. M. S. Challenger during the years 1873 - 76. Challenger Reports, 12, 1 - 554, pls. 1 - 55 and 1 a - 39 a.

Monro, C. C. A. (1939) Polychaeta. Antarctic Research Expedition, 1929 - 193, Reports, Ser. B (Zoology and Botany), 4 (4), 89 - 156. [28 figures, Adelaide, Australia.]

Okuda, S. (1937) Some ariciid worms from Japan. Annotationes Zoologicae Japanenses, 16, 99 - 105, 6 figures.

Okuda, S. (1938) Polychaetous annelids from the vicinity of the Mitsui Institute of Marine Biology. Journal of Zoology, Japan, 8, 75 - 105, 59 figures.

Okuda, S. (1939) Annelida Polychaeta in Onagawa Bay and its vicinity. II. Polychaeta Errantia with some addenda of Polychaeta Sedentaria. Science Reports, Tohoku University, series 4, Biology, 14, 219 - 244, figures 1 - 14.

Okuda, S. (1946) Studies on the development of the Annelida Polychaeta. I. Journal Faculty of Science, Hokkaido Imperial University, Zoology, 9, 115 - 219, 17 plates.

Ramos, J. M. (1976), Haploscoloplos kerguelensis McIntosh, 1885 - nouvel Orbiniidae en Mediterranee occidentale. Vie et Milieu, 26 (1 A), 1 - 9, 2 figures.

Gallery Image

FIGURE 3. Berkeleyia abyssala n. sp. Holotype (USNM 56500). A, anterior end, dorsal view; B, anterior abdominal parapodium (setiger 12), posterior view; C, furcate seta; D, abdominal neuropodial spine.

Gallery Image

FIGURE 8. Leitoscoloplos kerguelensis (McIntosh, 1885). Antarctic Peninsula (USNM 56504) A, anterior end, dorsal view; B, thoracic parapodium, anterior view; C, abdominal parapodium, anterior view; D – E, furcate setae.

Gallery Image

FIGURE 9. Leitoscoloplos kerguelensis (McIntosh, 1885). Antarctic Peninsula, Arthur Harbor (USNM 69381). A, anterior end, right lateral view; B, thoracic setae, arrow denotes a thin capillary seta of first row; C, abdominal parapodium, anterior view; D, posterior end and pygidium, dorsal view; E, furcate seta, arrows denote opening on tip of tynes. — F, Leitoscoloplos plataensis n. sp., off Argentina, paratype (USNM 1013635). E. anterior end in right lateral view.

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Orbiniidae

Genus

Leitoscoloplos