FIGURE 105. Various tube configurations constructed by Jassa. (a) a single tube amongst hydroids ... more FIGURE 105. Various tube configurations constructed by Jassa. (a) a single tube amongst hydroids constructed by J. marmorata, Nahant, Massachusetts, USA; (b) view through aquarium glass showing a tube built horizontally by J. staudei inside a diatom mass, Friday Harbor, Washington, USA; (c) dense clusters of tubes coating mussels on an offshore platform in the North Sea built by J. herdmani; (d) close-up of (c), with the arrows indicating the same individual in both images; (e) dense packing of individual tubes of J. herdmani, Helgoland, Germany; (f) two turquoise coloured individuals of J. herdmani (arrows) on the dense tube mass, same location as for (c). Images of J. marmorata and J. staudei by K. E. Conlan. Images of J. herdmani by J. Beermann.
FIGURE 100. Jassaingens (Pfeffer, 1888). Adult male, majorform, 20.3 mm, NHM 1969:705:9. Billie R... more FIGURE 100. Jassaingens (Pfeffer, 1888). Adult male, majorform, 20.3 mm, NHM 1969:705:9. Billie Rocks, Signy Island, South Orkney Islands (60°42ʹS, 45°36ʹW), 5 March 1965, M. H. Thurston, coll., station 10 (97). SCUBA collection on vertical creviced rock with Lithothamnia, Desmarestia anceps, Ascoseira mirabilis, Iophon/Phyllophora, Porifera, Polyzoa, 1.9–2.2 m depth, IZ 1989-013 (CMN). Adult female, 19.2 mm, NHM 723:7, Factory Cove–Berntsen Point, Signy Island, South Orkney Islands (60°42ʹS, 45°36ʹW), 15 April 1964, M. H. Thurston, coll., station 46 (1929). Agassiz trawl close inshore over boulder slopes with Desmarestia anceps, Phyllogigas grandifolius and Rhodophyceae dominant, 6–14 m depth, IZ 1989-013 (CMN). Lateral view: male uropod 3; medial views: female gnathopod 2 and uropod 3. Scale 0.1 mm.
FIGURE 96. Jassakjetilanna Vaderand Krapp, 2005. Adult male, majorform, 6.5 mm. Choiseul Sound, E... more FIGURE 96. Jassakjetilanna Vaderand Krapp, 2005. Adult male, majorform, 6.5 mm. Choiseul Sound, East Falkland, 29 October 2003, A. and W. Vader, coll., from the lithodid crab Paralomis granulosa (Hombron & Jacquinot, 1846) at 20–30 mdepth (TSZ Cr 19054). Lateral view: whole body and uropod 3; dorsal view: telson; other views medial. Scale 0.1 mm.
FIGURE 86. Jassa myersi Conlan, 1990. Variation in gnathopod 2 propodus length relative to body l... more FIGURE 86. Jassa myersi Conlan, 1990. Variation in gnathopod 2 propodus length relative to body length in males andfemales from a single population. Coal Oil Point, Goleta, California, 2 July 1961, J. L. Barnard, coll., stations 39-H-1, 39-H-2 and 39-K- 1, on rock surfaces in Phyllospadix zone, low intertidal zone (NHMLA). Linear regression assumptions failed for all plots.
FIGURE 82. Jassa carltoni Conlan, 1990. Holotype, adult male, major form, 3.0 mm, 62-132.1 (NHMLA... more FIGURE 82. Jassa carltoni Conlan, 1990. Holotype, adult male, major form, 3.0 mm, 62-132.1 (NHMLA). Corona del Mar, California, J. L. Barnard, coll., 9–11 December 1962, station 46-K-1, wash of 1/6 liter of ascidians and soft polychaete tubes collected at low tide. Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.
FIGURE 75. Jassa staudei Conlan, 1990. Holotype, adult male, major form, 6.0 mm, NMCC 1987-1074. ... more FIGURE 75. Jassa staudei Conlan, 1990. Holotype, adult male, major form, 6.0 mm, NMCC 1987-1074. North side of Wouwer Island, Broken Group, Barkley Sound, Vancouver Island, British Columbia (48°51.06ʹN, 125°21.08ʹW), 27 June 1976, E. L. Bousfield, coll., station B7, dip net collection at low water, amongst Phyllospadix Hooker (1840), kelp, sponges and under rock, 1976-157 (CMN). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.
FIGURE 73. Jassa staudei Conlan, 1990. Variation in thumb length relative to body length in thumb... more FIGURE 73. Jassa staudei Conlan, 1990. Variation in thumb length relative to body length in thumbed males from four populations collected in June on the Pacific coast of North America, ordered by latitude. West side of Wouwer Island, British Columbia, 27 June 1976, E. L. Bousfield, coll., station B7, low water collection, bedrock, Phyllospadix, kelp, sponges, ~12 °C, ~32+ psu, 1976-157 (CMN). Friday Harbor Laboratories, San Juan Island, Washington, west pressure head tank for marine lab aquaria, 3 June 1986, C. Staude, coll., IZ1984-175 (CMN). Shelter Cove, Point Delgada, California: 5 June 1986, P. Shaw, coll., formalin wash of open coast shallow subtidal algae and bryozoans (Aglaophenia Lamouroux, 1812),>33psu, rocky coast, strong surge. Albion Cove, California, 29 June 1978, J.R. Chess, coll., airlift pump of fouling community on rock substrate, 20 m depth, IZ1986-071 (CMN). Linear regression assumptions passed for the adult major form males at Friday Harbor and Point Delgada....
FIGURE 58. Jassamonodon (Heller, 1866). Adult male, major form, length unknown, CR 20621. Lesina ... more FIGURE 58. Jassamonodon (Heller, 1866). Adult male, major form, length unknown, CR 20621. Lesina (Hvar, Croatia), 1865, C. Heller, coll. (NHMW). Left side of body with magnification of the left second gnathopod. Photographs by Peter Dworschak (NHMW) with adjustments by S. Laurie-Bourque.
FIGURE 61. Jassakimi n. sp. Holotype, adult male, major form, 3.5 mm, DKU-115 (MARBK). Impo Port,... more FIGURE 61. Jassakimi n. sp. Holotype, adult male, major form, 3.5 mm, DKU-115 (MARBK). Impo Port, Yeosu-Si, The Republic of Korea, 23 June 2011, S.-S. Hong, coll. (MARBK). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1 and right mandible; other views medial. Scale 0.1 mm.
FIGURE 62. Jassa oclairi Conlan, 1990. Holotype, adult male, minor form, 7.7 mm, NMCC 1987-1071; ... more FIGURE 62. Jassa oclairi Conlan, 1990. Holotype, adult male, minor form, 7.7 mm, NMCC 1987-1071; allotype, adult female, 7.6 mm, NMCC 1987-1072; paratypes, juvenile male 1, 7.1 mm, NMCC 1987-1073; juvenile male 2, 4.1 mm, NMCC 1987- 1073 (CMN). Square Bay, Amchitka Island, Alaska (51°27.2ʹN, 170°11.5ʹE), 21 September 1969, C. E. O'Clair, coll., station CT 02069, amongst kelp community dominated by Laminaria longipes on exposed rocky shore in the intertidal zone below MLLW, 1976-30 (CMN). Lateral view: whole body; dorsal view: telson; other views medial. Appendages are of the holotype unless noted otherwise. Scale 0.1 mm. Illustration after Conlan (1990).
FIGURE 11. Records of Southern Hemisphere species of Jassa. Red dot: identification confirmed by ... more FIGURE 11. Records of Southern Hemisphere species of Jassa. Red dot: identification confirmed by specimen examination; green dot: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
FIGURE 3. Progressive discovery of Jassa slatteryi from 1850 to 1949. Red dot: identification con... more FIGURE 3. Progressive discovery of Jassa slatteryi from 1850 to 1949. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
FIGURE 2. Progressive discovery of Jassa marmorata from 1850 to 2020. Red dot: identification con... more FIGURE 2. Progressive discovery of Jassa marmorata from 1850 to 2020. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
<i>Jassagruneri</i> Conlan, 1990 (Table 13, Figs 102–103) <b>Diagnosis.</b&g... more <i>Jassagruneri</i> Conlan, 1990 (Table 13, Figs 102–103) <b>Diagnosis.</b> <b>Both sexes:</b> <i>Mandibular palp</i>: article 2, dorsal margin without a fringe of setae. <i>Maxilla 1</i>: without a cluster of setae at the base of the palp article 1. <i>Gnathopod 1</i>: basis, anterolateral margin with only a few short setae distally; carpus without a single or small cluster of short setae at the anterodistal junction of the propodus. <i>Gnathopod 2</i>: basis with a few or a full row of setae along the anterolateral margin (setal lengths 50% of the basis width); carpus and propodus, setae on the anterior margin short and simple (setal length &lt;basis width). <i>Pereopods 5–7</i>: propodus not expanded anteriorly. <i>Uropod 1</i>: ventral peduncular spinous process underlying about 40% of the longest ramus. <i>Uropod 3</i>: inner ramus without spines mid-dorsally (with only the single apical spine). <i>Telson</i>: tip without apical setae (only the usual short setae at each dorsolateral cusp). <b>Thumbed male:</b> unknown. <b>Adult female:</b> <i>Antenna 2</i>: without plumose setae on the flagellum and peduncular article 5. <i>Gnathopod 2</i>: propodus, palmsinuous. <b>Remarks.</b> This is a small-bodied species with the juvenile male holotype 2.1 mm and the adult female allotype 3.2 mm (Conlan 1990). It is part of the Southern Hemisphere sinuous-palmed group, keying closest to <i>J. thurstoni</i>. <i>Jassa gruneri</i> differs in the lack of a seta on the carpus of gnathopod 1 at the anterodistal junction of the propodus (present in <i>J. thurstoni</i>) and in the presence of a row of setae on the basis of gnathopod 2 (absent in <i>J. thurstoni</i>). This row is more pronounced in the female allotype than the juvenile male holotype (Fig. 102). Currently it is only known from Tasmania and New Zealand. The New Zealand specimen (Fig. 12) is a juvenile male and was found in a collection in Lyttelton harbour described by Chilton (1884). In this same collection is a specimen used by Chilton to describe his new specie [...]
FIGURE 37. Jassa pusilla (Sars, 1894). Paralectotype, adult female 1, about 4.5 mm, UiO F.10562 M... more FIGURE 37. Jassa pusilla (Sars, 1894). Paralectotype, adult female 1, about 4.5 mm, UiO F.10562 Mp 41. Hammerfest, Norway (71°N, 23.9°E), date unknown, G. O. Sars, coll., drawn from the slide mounted specimen and also illustrated in Sars (1894), plate 213 as Podocerus pusillus Sars, 1894. Adult female 2, body length unknown, UiO F.10564 Mp 41. Locality, date and collector unknown, illustrated in Sars (1894), plate 213 as Podocerus pusillus Sars, 1894. Adult female 3, 4.7 mm, UiO F.13359. Riŝr, Norway (approx. 59°N, 9°E), date unknown, G. O. Sars, coll. Lateral view: whole body, gnathopods 1 and 2 and pereopod 3; dorsal view: telson; medial view: uropod 3. Scale 0.1 mm. Illustration after Conlan (1990).
FIGURE 105. Various tube configurations constructed by Jassa. (a) a single tube amongst hydroids ... more FIGURE 105. Various tube configurations constructed by Jassa. (a) a single tube amongst hydroids constructed by J. marmorata, Nahant, Massachusetts, USA; (b) view through aquarium glass showing a tube built horizontally by J. staudei inside a diatom mass, Friday Harbor, Washington, USA; (c) dense clusters of tubes coating mussels on an offshore platform in the North Sea built by J. herdmani; (d) close-up of (c), with the arrows indicating the same individual in both images; (e) dense packing of individual tubes of J. herdmani, Helgoland, Germany; (f) two turquoise coloured individuals of J. herdmani (arrows) on the dense tube mass, same location as for (c). Images of J. marmorata and J. staudei by K. E. Conlan. Images of J. herdmani by J. Beermann.
FIGURE 100. Jassaingens (Pfeffer, 1888). Adult male, majorform, 20.3 mm, NHM 1969:705:9. Billie R... more FIGURE 100. Jassaingens (Pfeffer, 1888). Adult male, majorform, 20.3 mm, NHM 1969:705:9. Billie Rocks, Signy Island, South Orkney Islands (60°42ʹS, 45°36ʹW), 5 March 1965, M. H. Thurston, coll., station 10 (97). SCUBA collection on vertical creviced rock with Lithothamnia, Desmarestia anceps, Ascoseira mirabilis, Iophon/Phyllophora, Porifera, Polyzoa, 1.9–2.2 m depth, IZ 1989-013 (CMN). Adult female, 19.2 mm, NHM 723:7, Factory Cove–Berntsen Point, Signy Island, South Orkney Islands (60°42ʹS, 45°36ʹW), 15 April 1964, M. H. Thurston, coll., station 46 (1929). Agassiz trawl close inshore over boulder slopes with Desmarestia anceps, Phyllogigas grandifolius and Rhodophyceae dominant, 6–14 m depth, IZ 1989-013 (CMN). Lateral view: male uropod 3; medial views: female gnathopod 2 and uropod 3. Scale 0.1 mm.
FIGURE 96. Jassakjetilanna Vaderand Krapp, 2005. Adult male, majorform, 6.5 mm. Choiseul Sound, E... more FIGURE 96. Jassakjetilanna Vaderand Krapp, 2005. Adult male, majorform, 6.5 mm. Choiseul Sound, East Falkland, 29 October 2003, A. and W. Vader, coll., from the lithodid crab Paralomis granulosa (Hombron & Jacquinot, 1846) at 20–30 mdepth (TSZ Cr 19054). Lateral view: whole body and uropod 3; dorsal view: telson; other views medial. Scale 0.1 mm.
FIGURE 86. Jassa myersi Conlan, 1990. Variation in gnathopod 2 propodus length relative to body l... more FIGURE 86. Jassa myersi Conlan, 1990. Variation in gnathopod 2 propodus length relative to body length in males andfemales from a single population. Coal Oil Point, Goleta, California, 2 July 1961, J. L. Barnard, coll., stations 39-H-1, 39-H-2 and 39-K- 1, on rock surfaces in Phyllospadix zone, low intertidal zone (NHMLA). Linear regression assumptions failed for all plots.
FIGURE 82. Jassa carltoni Conlan, 1990. Holotype, adult male, major form, 3.0 mm, 62-132.1 (NHMLA... more FIGURE 82. Jassa carltoni Conlan, 1990. Holotype, adult male, major form, 3.0 mm, 62-132.1 (NHMLA). Corona del Mar, California, J. L. Barnard, coll., 9–11 December 1962, station 46-K-1, wash of 1/6 liter of ascidians and soft polychaete tubes collected at low tide. Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.
FIGURE 75. Jassa staudei Conlan, 1990. Holotype, adult male, major form, 6.0 mm, NMCC 1987-1074. ... more FIGURE 75. Jassa staudei Conlan, 1990. Holotype, adult male, major form, 6.0 mm, NMCC 1987-1074. North side of Wouwer Island, Broken Group, Barkley Sound, Vancouver Island, British Columbia (48°51.06ʹN, 125°21.08ʹW), 27 June 1976, E. L. Bousfield, coll., station B7, dip net collection at low water, amongst Phyllospadix Hooker (1840), kelp, sponges and under rock, 1976-157 (CMN). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1; other views medial. Scale 0.1 mm.
FIGURE 73. Jassa staudei Conlan, 1990. Variation in thumb length relative to body length in thumb... more FIGURE 73. Jassa staudei Conlan, 1990. Variation in thumb length relative to body length in thumbed males from four populations collected in June on the Pacific coast of North America, ordered by latitude. West side of Wouwer Island, British Columbia, 27 June 1976, E. L. Bousfield, coll., station B7, low water collection, bedrock, Phyllospadix, kelp, sponges, ~12 °C, ~32+ psu, 1976-157 (CMN). Friday Harbor Laboratories, San Juan Island, Washington, west pressure head tank for marine lab aquaria, 3 June 1986, C. Staude, coll., IZ1984-175 (CMN). Shelter Cove, Point Delgada, California: 5 June 1986, P. Shaw, coll., formalin wash of open coast shallow subtidal algae and bryozoans (Aglaophenia Lamouroux, 1812),>33psu, rocky coast, strong surge. Albion Cove, California, 29 June 1978, J.R. Chess, coll., airlift pump of fouling community on rock substrate, 20 m depth, IZ1986-071 (CMN). Linear regression assumptions passed for the adult major form males at Friday Harbor and Point Delgada....
FIGURE 58. Jassamonodon (Heller, 1866). Adult male, major form, length unknown, CR 20621. Lesina ... more FIGURE 58. Jassamonodon (Heller, 1866). Adult male, major form, length unknown, CR 20621. Lesina (Hvar, Croatia), 1865, C. Heller, coll. (NHMW). Left side of body with magnification of the left second gnathopod. Photographs by Peter Dworschak (NHMW) with adjustments by S. Laurie-Bourque.
FIGURE 61. Jassakimi n. sp. Holotype, adult male, major form, 3.5 mm, DKU-115 (MARBK). Impo Port,... more FIGURE 61. Jassakimi n. sp. Holotype, adult male, major form, 3.5 mm, DKU-115 (MARBK). Impo Port, Yeosu-Si, The Republic of Korea, 23 June 2011, S.-S. Hong, coll. (MARBK). Mouthparts. Frontal view: upper lip; lateral view: maxilla 1 and right mandible; other views medial. Scale 0.1 mm.
FIGURE 62. Jassa oclairi Conlan, 1990. Holotype, adult male, minor form, 7.7 mm, NMCC 1987-1071; ... more FIGURE 62. Jassa oclairi Conlan, 1990. Holotype, adult male, minor form, 7.7 mm, NMCC 1987-1071; allotype, adult female, 7.6 mm, NMCC 1987-1072; paratypes, juvenile male 1, 7.1 mm, NMCC 1987-1073; juvenile male 2, 4.1 mm, NMCC 1987- 1073 (CMN). Square Bay, Amchitka Island, Alaska (51°27.2ʹN, 170°11.5ʹE), 21 September 1969, C. E. O'Clair, coll., station CT 02069, amongst kelp community dominated by Laminaria longipes on exposed rocky shore in the intertidal zone below MLLW, 1976-30 (CMN). Lateral view: whole body; dorsal view: telson; other views medial. Appendages are of the holotype unless noted otherwise. Scale 0.1 mm. Illustration after Conlan (1990).
FIGURE 11. Records of Southern Hemisphere species of Jassa. Red dot: identification confirmed by ... more FIGURE 11. Records of Southern Hemisphere species of Jassa. Red dot: identification confirmed by specimen examination; green dot: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
FIGURE 3. Progressive discovery of Jassa slatteryi from 1850 to 1949. Red dot: identification con... more FIGURE 3. Progressive discovery of Jassa slatteryi from 1850 to 1949. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
FIGURE 2. Progressive discovery of Jassa marmorata from 1850 to 2020. Red dot: identification con... more FIGURE 2. Progressive discovery of Jassa marmorata from 1850 to 2020. Red dot: identification confirmed by specimen examination; green triangle: literature record (Supplementary Table S1) with identification not confirmed but judged likely to be this species; blue x: suspected or known to be on the hull or interior of a boat or ship.
<i>Jassagruneri</i> Conlan, 1990 (Table 13, Figs 102–103) <b>Diagnosis.</b&g... more <i>Jassagruneri</i> Conlan, 1990 (Table 13, Figs 102–103) <b>Diagnosis.</b> <b>Both sexes:</b> <i>Mandibular palp</i>: article 2, dorsal margin without a fringe of setae. <i>Maxilla 1</i>: without a cluster of setae at the base of the palp article 1. <i>Gnathopod 1</i>: basis, anterolateral margin with only a few short setae distally; carpus without a single or small cluster of short setae at the anterodistal junction of the propodus. <i>Gnathopod 2</i>: basis with a few or a full row of setae along the anterolateral margin (setal lengths 50% of the basis width); carpus and propodus, setae on the anterior margin short and simple (setal length &lt;basis width). <i>Pereopods 5–7</i>: propodus not expanded anteriorly. <i>Uropod 1</i>: ventral peduncular spinous process underlying about 40% of the longest ramus. <i>Uropod 3</i>: inner ramus without spines mid-dorsally (with only the single apical spine). <i>Telson</i>: tip without apical setae (only the usual short setae at each dorsolateral cusp). <b>Thumbed male:</b> unknown. <b>Adult female:</b> <i>Antenna 2</i>: without plumose setae on the flagellum and peduncular article 5. <i>Gnathopod 2</i>: propodus, palmsinuous. <b>Remarks.</b> This is a small-bodied species with the juvenile male holotype 2.1 mm and the adult female allotype 3.2 mm (Conlan 1990). It is part of the Southern Hemisphere sinuous-palmed group, keying closest to <i>J. thurstoni</i>. <i>Jassa gruneri</i> differs in the lack of a seta on the carpus of gnathopod 1 at the anterodistal junction of the propodus (present in <i>J. thurstoni</i>) and in the presence of a row of setae on the basis of gnathopod 2 (absent in <i>J. thurstoni</i>). This row is more pronounced in the female allotype than the juvenile male holotype (Fig. 102). Currently it is only known from Tasmania and New Zealand. The New Zealand specimen (Fig. 12) is a juvenile male and was found in a collection in Lyttelton harbour described by Chilton (1884). In this same collection is a specimen used by Chilton to describe his new specie [...]
FIGURE 37. Jassa pusilla (Sars, 1894). Paralectotype, adult female 1, about 4.5 mm, UiO F.10562 M... more FIGURE 37. Jassa pusilla (Sars, 1894). Paralectotype, adult female 1, about 4.5 mm, UiO F.10562 Mp 41. Hammerfest, Norway (71°N, 23.9°E), date unknown, G. O. Sars, coll., drawn from the slide mounted specimen and also illustrated in Sars (1894), plate 213 as Podocerus pusillus Sars, 1894. Adult female 2, body length unknown, UiO F.10564 Mp 41. Locality, date and collector unknown, illustrated in Sars (1894), plate 213 as Podocerus pusillus Sars, 1894. Adult female 3, 4.7 mm, UiO F.13359. Riŝr, Norway (approx. 59°N, 9°E), date unknown, G. O. Sars, coll. Lateral view: whole body, gnathopods 1 and 2 and pereopod 3; dorsal view: telson; medial view: uropod 3. Scale 0.1 mm. Illustration after Conlan (1990).
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