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22 results for “Namanereis”
FIGURE 3. Jaw piece dissected from Namanereis hummelincki USNM 1283368 in A new record of the freshwater polychaete Namanereis hummelincki (Polychaeta: Nereididae) from epigean waters of Montserrat
FIGURE 3. Jaw piece dissected from Namanereis hummelincki USNM 1283368, ventromedial view. (Note the protrusion slightly proximal to the jaw's terminal bifurcation.)
FIGURE 1 in A new record of the freshwater polychaete Namanereis hummelincki (Polychaeta: Nereididae) from epigean waters of Montserrat
FIGURE 1. Montserrat and its major drainages. The two collection sites mentioned in this paper are marked by small dots along the Nantes River.
FIGURE 4 in A new record of the freshwater polychaete Namanereis hummelincki (Polychaeta: Nereididae) from epigean waters of Montserrat
FIGURE 4. Neighbor-Joining phylogenetic tree of Namanereis hummelincki (USNM 1283368) from Montserrat and similar sequences. The evolutionary history was inferred using the Neighbor-Joining method (Saitou & Nei 1987) The optimal tree with the sum of branch length = 0.66065705 is shown. The percentage of replicate trees in which the associated taxa clustered together in the bootstrap test (1000 replicates) are shown next to the branches (Felsenstein 1985). The tree is drawn to scale, with branch lengths in the same units as those of the evolutionary distances used to infer the phylogenetic tree. The evolutionary distances were computed using the p-distance method (Nei & Kumar 2000) and are in the units of the number of base differences per site. The analysis involved 11 nucleotide sequences. Codon positions included were 1st+2nd+3rd+Noncoding. All positions containing gaps and missing data were eliminated. There were a total of 585 positions in the final dataset. Evolutionary analyses were conducted in MEGA6 (Tamura et al. 2013).
Figure 2 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 2. Namanereis pilbarensis sp. nov. Paratypes A–F (SMF 22372), G (SMF 22371). Scanning electron micrograph. A, anterior end, ventrolateral from right side. B, anterior end, dorsal view. C, proboscis with jaws partly everted, anterior view. D, parapodium chaetiger 7, right side, anterior view. E, chaetiger 16, right side, supra-acicular falciger. F, chaetae from chaetiger 10, right side, posterior view. G, pygidium, dorsal view. Scale bars: A−C, G = 100 μm; D = 30 μm; E = 3 μm; F = 10 μm.
Figure 3 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 3. Namanereis pilbarensis sp. nov. Holotype A–F (WAM V8206), paratype G (NTM W19176). A, parapodium, chaetiger 32; B, parapodium, chaetiger 60; C, supra-acicular falciger, chaetiger 32. D, heterogomph spiniger, chaetiger 60; E, heterogomph spiniger, chaetiger 32; F, subacicular falciger, chaetiger 32. G, jaw, right side, dorsal view. Scale bars: A = 0.2 mm, B = 0.1 mm; C–F = 0.02 mm; G = 0.05 mm.
Figure 1 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 1. Namanereis pilbarensis sp. nov. A, live specimen, dorsal view; B, preserved specimen (WAM V8206), close up of anterior end, dorsal view; C, preserved specimen (WAM V8206), whole body, dorsal view. Scale bars: A = 0.1 mm; B = 0.05 mm; C = 0.2 mm.
Figure 7 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 7. Morphological adaptations of various Namanereis species arranged to show increasing specialization to subterranean waters (top two) from marine representatives (bottom two). A, C, E, G, anterior end from dorsal; B, D, F, H, parapodia. A, B, Namanereis araps; C, D, Namanereis beroni; E, F, Namanereis littoralis; G, H, Namanereis malaitae. Types of chaetae, 1: sesquigomph spinigers, 2: heterogomph falcigers, 3: heterogomph pseudospiniger, 4: fine, simple chaetae in metamorphosed (epitokous) form. (A, B after Glasby, 1997; C, D after Hartmann-Schröder & Marinov, 1977; E, F after Grube, 1872; G, H after Gibbs, 1971).
Figure 6 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 6. Namanereis socotrensis sp. nov. Paratype NTM W25485. A, parapodium, chaetiger 10; B, parapodium, chaetiger 60; C, heterogomph spiniger, chaetiger 60; D, subacicular heterogomph falciger, chaetiger 60 (left); supra-acicular heterogomph falciger, chaetiger 60 (right); E, F, left and right side jaws, respectively, ventral view. Scale bars: A, B = 0.2 mm; C, D = 0.02 mm; E, F = 0.1 mm.
Figure 5 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 5. Namanereis socotrensis sp. nov. Holotype (SMF 22368). Scanning electron micrograph. A, anterior end, right side, lateral view. B, anterior end, left side, lateral view. C, 25–18 posterior-most chaetigers, left side, lateral view. D, chaetae, chaetiger 7, right side. E, chaetae, chaetiger 10, left side. F, posterior end, posterior view. Scale bars: A−C = 300 μm; D, E = 30 μm; F = 100 μm.
Figure 8 in Stygobiont polychaetes: notes on the morphology and the origins of groundwater Namanereis (Annelida: Nereididae: Namanereidinae), with a description of two new species
Figure 8. Global distribution of Namanereis species. Black flag, bifid-jawed stygobionts; black triangles, single terminal tooth-jawed stygobionts; grey triangles, single terminal tooth-jawed littoral species.
Figure 4 from: Núñez J, Glasby CJ, Naranjo M (2020) Groundwater annelids from Gran Canaria and Fuerteventura (Canary Islands), with the description of two new species of Namanereis (Namanereidinae, Nereididae, Polychaeta). Subterranean Biology 36: 35-49. https://doi.org/10.3897/subtbiol.36.55090
Figure 4 Namanereis canariarum sp. nov. a jaw pieces of the pharynx, ventral view b parapodium, detail of the acicular lobes c pseudospiniger blade tip d subneuroacicular heterogomph falciger, chaetiger 60. Namanereis llanetensis sp. nov. e Holotype, detail of the basal spinulation, hererogomph spiniger, chaetiger 10 f Holotype, detail of spinulation, subneuroacicular heterogomph falciger, chaetiger 10.
Figure 3 from: Núñez J, Glasby CJ, Naranjo M (2020) Groundwater annelids from Gran Canaria and Fuerteventura (Canary Islands), with the description of two new species of Namanereis (Namanereidinae, Nereididae, Polychaeta). Subterranean Biology 36: 35-49. https://doi.org/10.3897/subtbiol.36.55090
Figure 3 Namanereis llanetensis sp. nov. a anterior end, dorsal view b everted pharynx with jaws, dorsal view c jaws ventral view d posterior end, dorsal view e parapodium from chaetiger 3 f parapodium from chaetiger 60 g supraneuroacicular falciger, chaetiger 60 h subneuroacicular falciger, chaetiger 3 i supraneuroacicular falciger, chaetiger 3 j subneuroacicular falciger, chaetiger 3 k supraneuroacicular spiniger, blade not fully shown, chaetiger 3 l subneuropodial spiniger, blade not fully shown, chaetiger 10 m subneuroacicular spiniger, blade fully shown, chaetiger 60 n supraneuroacicular spiniger, blade fully shown, chaetiger 60.
Figure 2 from: Núñez J, Glasby CJ, Naranjo M (2020) Groundwater annelids from Gran Canaria and Fuerteventura (Canary Islands), with the description of two new species of Namanereis (Namanereidinae, Nereididae, Polychaeta). Subterranean Biology 36: 35-49. https://doi.org/10.3897/subtbiol.36.55090
Figure 2 Namanereis canariarum sp. nov. a anterior end, everted pharynx, dorsal view b jaw pieces of the pharynx, frontal view c parapodium from chaetiger 10 d parapodium from chaetiger 60 e supraneuroacicular falciger, chaetiger 30 f subneuroacicular falciger, chaetiger 10 g subneuroacicular pseudospiniger, chaetiger 30 h supraneuroacicular spiniger, blade not fully shown, chaetiger 10 i supraneuroacicular spiniger, blade fully shown, chaetiger 10 j subneuroacicular pseudospiniger, chaetiger 10 k supraneuroacicular falciger, chaetiger 30 l subneuroacicular falciger, chaetiger 30.
Figure 1 from: Núñez J, Glasby CJ, Naranjo M (2020) Groundwater annelids from Gran Canaria and Fuerteventura (Canary Islands), with the description of two new species of Namanereis (Namanereidinae, Nereididae, Polychaeta). Subterranean Biology 36: 35-49. https://doi.org/10.3897/subtbiol.36.55090
Figure 1 a Distribution in Canary Islands of Namanereis canariarum sp. nov. (yellow dot) and Namanereis llanetensis (red dot) bNamanereis canariarum sp. nov. live specimen, dorsal view cNamanereis llanetensis sp. nov. live specimen, dorsal view d Los Llanetes water mine (Valsequillo, Gran Canaria) type locality of N. llanetensis sp. nov.
Figure 7 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 7 - Proposed evolution of jaws in Namanereidinae. A Jaws with fully dentate cutting edge, layer almost inconspicuous in basal teeth B Layer increases their extension among basal teeth and reaches medial ones C Layer covers completely basal and medial teeth, and reaches subterminal ones D Teeth recede and become narrow, layer covers subterminal teeth excepting the last two E Just remnants of teeth are visible if any, layer increases its extension F Teeth fully replaced by the layer. Stages B and C in most Namalycastis species and Namanereis with serrated cutting edge; stage D as in Namanereis stocki and N. tiriteae; stage E as in Namanereis socotrensis; stage F as in Namanereis with bifid jaws and Namalycastis occulta.
Figure 4 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 4 - Histograms showing length ratios of some troglomorphic features among Namalycastis (boldface) and Namanereis (lightface) species. A Ratios between length of tentacular cirri (Lpt) and wide of prostomium (Wp) B Difference (Dd-v) between ratios of dorsalmost (Dm) and ventralmost (Vm) falcigers at chaetiger 10. Sorted from highest to lowest ratios; asterisks highlight stygobiont Namanereis.
Figure 2 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 2 - Namanereis christopheri sp. n. A, B, F–O Holotype LACM-AHF 1227 C–E paratype LACM-AHF 1229 A Anterior end, dorsal view B Posterior end, dorsal view C Close-up of prostomium D Areas V and VI, pharynx dissected E Right jaw, dorsal view F Chaetiger 5, right parapodium G Chaetiger 21, right parapodium H Chaetiger 49, right parapodium I Chaetiger 90, right parapodium J Supra-acicular sesquigomph spiniger, chaetiger 49 K Sub-acicular heterogomph falciger, chaetiger 49 L Supra-acicular heterogomph falciger, chaetiger 49 M Sub-acicular heterogomph falciger, chaetiger 49 N Close-up of blade, supra-acicular sesquigomph spiniger, chaetiger 49 O Close-up of blade, supra-acicular heterogomph falciger, chaetiger 49. Scale bars: 0.5 mm (A–D); 0.1 mm (E); 0.1 mm (F–I); 50 µm (J, K); 30 µm (L, M); 10 µm (N, O).
Figure 1 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 1 - Namanereis cavernicola (Solís-Weiss & Espinasa, 1991). A–H Paratype USNM 136559 A Anterior end, dorsal view B Close-up of prostomium C Posterior end, dorsal view D Supra-acicular falciger, chaetiger 62 E Sub-acicular falciger, chaetiger 62 F Chaetiger 5, right parapodium G Chaetiger 20, right parapodium H Chaetiger 62, right parapodium. Scale bars: 1 mm (A); 0.2 mm (B, F–H); 0.5 mm (C); 10 µm (D, E).
Figure 6 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 6 - Chaetal arrangement of some namanereidins referred in this study. A Scheme showing the parapodial fascicles and their positions in relation to neuroaciculum B Neuropodial lobe of right parapodium from chaetiger 10 of Namalycastis occulta, showing the position of chaetae in type D species when mounted C–E Chaetal arrangement of types A, C and E, and their variants found in literature (modified from Glasby 1999, Fig. 1).
Figure 3 from: Conde-Vela VM (2017) The troglomorphic adaptations of Namanereidinae (Annelida, Nereididae) revisited, including a redescription of Namanereis cavernicola (Solís-Weiss & Espinasa, 1991), and a new Caribbean species of Namanereis Chamberlin, 1919. Subterranean Biology 23: 19-28. https://doi.org/10.3897/subtbiol.23.13701
Figure 3 - Histograms showing length ratios of parapodial cirri among Namalycastis (boldface) and Namanereis (lightface) species. A Ratios between length of dorsal cirri (Ld) and length of neuroacicular lobe (Ln) at anterior (ALd/Ln) and posterior chaetigers (PLd/Ln), and difference among them (Dp−a) B Ratios between length of dorsal cirri (Ld) and length of neuroacicular lobe (Ln) at anterior chaetigers (ALd/Ln) only. Sorted from highest to lowest ratios; asterisks highlight stygobiont Namanereis.
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