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Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae)
No full textKalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy, Brickle, Paul (2013): Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae). Zootaxa 3647 (4): 541-554, DOI: 10.11646/zootaxa.3647.4.
Palliatus Schulman et al. 1979
No full textPalliatus Schulman et al. 1979Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 551, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
Alatasporidae Shulman, Kovaleva & Dubina 1979
No full textFamily Alatasporidae Shulman, Kovaleva & Dubina, 1979Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 543, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
Sphaerosporidae Thelohan 1892
No full textFamily Sphaerosporidae Thélohan, 1892Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 551, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
Pseudalataspora Kovaleva & Gaevskaya 1983
No full textPseudalataspora Kovaleva & Gaevskaya, 1983Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 543, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
FIGURE 11 in Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae)
No full textFIGURE 11. Myxidium baueri. Fresh spore under Nomarski interference-contrast illumination. Scale bar: 10μm.Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 548, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
FIGURE 8–10 in Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae)
No full textFIGURE 8–10. Line drawings of Myxidium baueri. 8. Spore unstained, valvular view. 9. Spore unstained, sutural view. 10. Spore, valvular view, stained with Giemsa. Scale bar: 5μm.Published as part of Kalavati, Chaganti, Mackenzie, Ken, Collins, Catherine, Hemmingsen, Willy & Brickle, Paul, 2013, Two new species of myxosporean parasites (Myxosporea: Bivalvulida) from gall bladders of Macruronus magellanicus Lönnberg, 1907 (Teleostei: Merlucciidae), pp. 541-554 in Zootaxa 3647 (4) on page 548, DOI: 10.11646/zootaxa.3647.4.4, http://zenodo.org/record/22300
Rossella nuda Topsent 1901
No full textRossella nuda Topsent, 1901 (Figure 22) Material: Samples in 95% ethanol, tissue section and spicule preparation on slides. BELUM Mc 7650. Jagged Point, Possession Bay, South Georgia (54°04.514’S, 37° 07.188’W); depth 10.4m; collected by C. Goodwin, D. Poncet and P. Brewin, 23 rd November 2010. Comparative material examined: BMNH Rossella nuda (Topsent) Discovery Antarctic Collection 1926- 27.Dried specimens RN CLVI II, R.N. CKVI I External morphology: In situ appearance: Large (maximum diameter> 100cm) vase shaped white sponge with lobose surface (Fig. 22a). Preserved appearance: Small slide of edge of sponge. Tough with a very hispid surface like a mat of hairs. Skeleton: Skeleton composed of free diactines with hypodermal diactines and pentactines, outer dermal spicules spined pentatines and hexactines. Spicules: Hypodermal diactines: (not measured, Barthel and Tendal (1994) report 2500–3500µm) Spined hexactine (Fig. 22b). Calycocome: very rare, one measured: 211µm in diameter (Fig. 22c). Oxyhexaster: diameter 101(181)247µm (Fig. 22d). Microdiscohexaster: diameter 30(32)35µm (Fig. 22e). Remarks: In the original description Topsent lists the microscleres as oxyhexasters 120µm in diameter, calcycocomes of a uniform diameter (250µm), microdiscohexasters 40–50µm in diameter, and larger discohexasters 100µm in diameter. The latter were only noted in small quantities and we didn’t find them in our specimen. Distribution: This specimen was situated in a small cave at 8m, attached to bedrock. Rossella nuda has been recorded on the Victoria Land coast from the eastern Weddell Sea to the Ross Sea, including McMurdo Sound, and the Bellingshausen Sea (Topsent 1901; Kirkpatrick 1907; Burton 1929; Koltun 1976; Barthel and Tendal, 1994; Janussen and Reiswig 2009); South Georgia (Burton 1940 but no details given, Barnes et al. 2006b) and the Falkland Islands (Burton 1940 but no details given) and the coast of Argentina (Burton 1940); from depths of 18–1579m. Burton (1929) recognised five species of Rossella including R. nuda but Koltun (1976) only recognised R. antarctica and R. racovitzae one of which he regarded as a ‘ highly polymorphic species’, many species have since been reinstated by Barthel and Tendal (1994). Barnes et al. (2006b) recorded specimens of Rossella nuda from Morraine Fjord on South Georgia at 18m, which were the shallowest known records for R. nuda at that time.Published as part of Goodwin, Claire & Brickle, Paul, 2012, Sponge biodiversity of South Georgia island with descriptions of fifteen new species, pp. 1-48 in Zootaxa 3542 on pages 42-4
Hymedesmia (Hymedesmia) barnesi Goodwin & Brickle 2012, sp. nov.
No full textHymedesmia (Hymedesmia) barnesi sp. nov. (Figure 10) Type material: Holotype: BELUM Mc 7627. Sample in 95% ethanol, tissue section and spicule preparation on slides; Right Whale Bay, South Georgia (54°00.173’S, 37° 40.856’W); depth 18m; collected by C. Goodwin, J. Brown and S. Brown, 21 st November 2010. Paratype: BELUM Mc 7677. Sample in 95% ethanol, tissue section and spicule preparation on slides; Green Island, Stromness, Site 1, South Georgia (54°09.448’S, 36° 39.752’W); depth 17.4m; collected by C. Goodwin, P. Brickle and S. Cartwright, 27 th November 2010. Etymology: Named after Dr David Barnes of British Antarctic Survey, project leader of the ‘Mapping the Benthic Biodiversity of South Georgia’ Darwin Initiative, in recognition of his support of this work. External morphology: In situ appearance: Thinly encrusting (<3mm), bright orange, crust with pore sieves. Star shaped patterns of exhalent channels also visible (Fig. 10a). Encrusting on bedrock, patches up to 15cm in diameter. Preserved appearance: Thin white crust. Skeleton: Typical hymedesmoiid skeleton with a dense basal layer of primary and echinating acanthostyles with ascending columns of the ectosomal spicules 3–6 spicules thick. Thick ectosomal layer of chelae (Fig. 10b). Spicules: Measurements from Mc7627. Primary acanthostyles: 272(317)392 by 22(29)39µm at head. Tylote head bearing short rounded spines. Spined up to 1/3 of the shaft (Fig. 10c). Echinating acanthostyles: 102(138)161 by 9.3(17.2)24.5µm at head. Entirely spined with conical pointed spines (Fig. 10d). Ectosomal spicules: styles/tornotes 188(249)276 by 5.1(6.8)9.5µm. Fusiform with the ends variable in form: the majority are styles with one rounded, sometimes slightly tylote, and one pointed end but in some spicules the rounded end is modified into a point (Fig. 10e,f). Chelae: 23.6(27.7)30.7µm (Fig. 10g). Remarks: The majority of Hymedesmia (Hymedesmia) species occurring in the Antarctic have much bigger spicules or they possess sigma microscleres (Table 5). The size range of the spicules in this species is similar to H. gaussiana Hentschel, 1914. Unfortunately the type specimen of this species (ZMH collection) was destroyed in the Second World War and so is not available for examination. However, it differs in having strongyles as ectosomal spicules and entirely spined large acanthostyles.Published as part of Goodwin, Claire & Brickle, Paul, 2012, Sponge biodiversity of South Georgia island with descriptions of fifteen new species, pp. 1-48 in Zootaxa 3542 on pages 17-1
Lissodendoryx (Ectyodoryx) collinsi Goodwin & Brickle 2012, sp. nov.
No full textLissodendoryx (Ectyodoryx) collinsi sp. nov. (Figure 9) Type material: Holotype: BELUM Mc 7676. Sample in 95% ethanol, tissue section and spicule preparation on slides; Green Island, Stromness, Site 1, South Georgia (54°09.448’S, 36° 39.752’W); depth 17.4m; collected by C. Goodwin, P. Brickle and S. Cartwright, 27 th November 2010. Paratype: BELUM Mc 7681. Sample in 95% ethanol, tissue section and spicule preparation on slides; Green Island, Stromness, Site 1, South Georgia (54°09.448’S, 36° 39.752’W); depth 17.4m; collected by C. Goodwin, P. Brickle and S. Cartwright, 27 th November 2010. Etymology: Named after Dr Martin Collins, current South Georgia Chief Executive Officer and Director of Fisheries, and member of the Shallow Marine Surveys Group, who generously provided accommodation to researchers pre- and post survey. External morphology: In situ appearance: Massively encrusting peach sponge with irregular lobed surface. Texture of sponge surface smooth (Fig. 9a). Preserved appearance: White sponge, firm but compressible. Smooth ectosomal layer. Skeleton: The choanosomal skeleton is formed of a loose, confused, reticulation of columns of styles echinated by acanthostyles. Ascending columns up to 15 spicules thick joined by bundles of 1–3 spicules. Columns anastomise frequently. The ectosomal skeleton consists of brushes of tornotes (Fig. 9b). Spicules: Measurements from Mc7676. Choanosomal styles: 301(342)396 by 9.1 (12.3) 15.2µm. Smooth styles which come to an abrupt point (Fig. 9c). Echinating acanthostyles: 95(121)178 by 3.8(7.3)13.9µm. Parallel sided then coming to an abrupt point. Entirely spined with small, neat conical spines (Fig. 9d). Ectosomal tornotes: 216(256)295 by 5.4 (7.8)10.9µm (Fig. 9e, f). Microscleres: absent. Remarks: These specimens have been assigned to the genus Lissodendoryx on the basis of the presence of a choanosomal skeleton of styles and acanthostyles and the presence of ectosomal tornotes. The presence of echinating acanthostyles in the skeletal tracts assigns this to the subgenus Lissodendoryx (Ectyodoryx) (van Soest 2002a). All other Antarctic or South Atlantic species have chelae or sigma microscleres (Table 4).Published as part of Goodwin, Claire & Brickle, Paul, 2012, Sponge biodiversity of South Georgia island with descriptions of fifteen new species, pp. 1-48 in Zootaxa 3542 on pages 16-1
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