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32 results for “Synchaeta”
Figure 6 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 6 Trunk region. A–D Morphology of the trunk region (thick lines) A conical (S. tremula) B cylindrical (S. tavina) C bell-shaped (S. tremuloida) D wineglass-shaped (S. longipes) E Presence of a distinct anal pseudosegment (thick line; S. oblonga) F Presence of a posteriodorsal saccate appendage (thick line; S. arcifera) G, H Longitudinal striae on the dorsal trunk G present (S. tavina) H absent (S. pectinata) I–L Location of the internal organs I occupy entire trunk region (S. oblonga) J occupy middle and caudal trunk regions, oesophagus only structure in the anterior trunk (S. pectinata) K occupy middle trunk region, cloaca ends anteriorly to the lateral antennae (S. grimpei) L stomach and ovary each occupy separate sides of the trunk (S. longipes). Drawings modified from B, GRousselet (1902)FRougier and Pourriot (2006). Scale bar: 50 µm.
Figure 3 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 3 Habitat and behaviour. A–C Examples of the swimming behaviour A straight (S. tremula) B slightly coiled (S. stylata) C distinctly coiled (S. pectinata) D–E Foot position (thick lines) while swimming D foot retracted (S. baltica) E foot not retracted (S. tremula). Scale bar: 50 µm.
Figure 4 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 4 Head and neck region. A, B Relative width of the apical field (dashed lines) A as wide as the trunk (S. tremuloida) B wider than the trunk (S. longipes) C–F Elevation of the apical field (top line) relative to the auricles (bottom line) C level (S. grimpei) D slightly elevated (S. tremula) E intermediate (S. oblonga) F strongly elevated (S. grandis) G–I Elevation of the dorsolateral styles (thick lines) G not or very slightly raised (S. tremula) H intermediate (S. gyrina) I strongly raised (S. baltica) J–M Auricle size (thick lines) and orientation (arrows) J not clearly demarcated from rotatory organ, directed laterally (S. grimpei) K small, directed laterally (S. tremula) L medium, directed semi-caudally (S. oblonga) M large, directed caudally (S. grandis) N–Q Separation of the head and trunk region N gradual transition, the head is not distinctly offset from the trunk (S. tremula) O head and trunk are demarcated by the narrower neck (S. tremuloida) P demarcation by a sharp constriction in the neck region (S. pachypoda) Q by distinct transversal folds (S. oblonga) R Presence of saccate appendages (thick lines) caudal to auricles (S. bicornis). Drawings modified from: PKutikova and Vassiljeva (1982)RKoste (1981). Scale bars: 50 µm.
Figure 2 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 2 Species of Synchaeta from brackish, marine and inland saline habitats. AS. grimpeiBS. balticaCS. johanseniDS. bicornisES. gyrinaFS. triophthalmaGS. ceciliaHS. voraxIS. fennicaJS. cylindricaKS. tavinaLS. neapolitanaMS. hutchingsiNS. atlanticaOS. rousseletiPS. glacialisQS. hyperboreaRS. arciferaSS. tamaraTS. bacilliferaUS. squamadigitata. Drawings modified from: CHarring (1921)DKoste (1981)G, K, LRousselet (1902)IRousselet (1909)JAlthaus (1957)NZelinka (1907)OZelinka (1927)P, Q, SSmirnov (1932) and Friedrich and De Smet (2000)RRougier and Pourriot (2006)TSmirnov (1933)UDe Smet (2006). Scale bar: 100 µm.
Figure 15 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 15 SEM images of the trophi. A–F Ramus ("unci") teeth (ventral sides of the trophi directed upwards) A teeth absent (S. pectinata) B no distinct teeth, only a serrated plate (S. vorax) C teeth distinctly incised (S. gyrina) D teeth distinctly incised and separated into two groups by a deep sulcus (arrow; S. oblonga) E dorsal group of teeth distinctly incised and ventral group of teeth comb-like (S. triophthalma) F dorsal teeth comb-like and ventral teeth distinctly incised, groups of teeth separated by a deep sulcus (arrow; S. baltica) G–J Shape of the lateral fulcrum (normal and dashed arrows) and thickness of the cauda (arrow-heads) (trophi from lateral view, ventral sides directed upwards) G fulcrum blade-like, narrow, distal end not oblique, cauda of medium thickness (S. tremula) H fulcrum machete-like, distal end oblique, cauda of medium thickness (S. oblonga) I fulcrum broad, with distinct dorsal thickening (dashed arrow) and ventral lamella (arrow; S. vorax) J fulcrum axe-shaped, very broad, with oblique distal end, cauda robust (S. longipes) K, L Shape of the hypopharynx (arrow) K small to medium, robust (S. tremula) L broad to very broad, laterally pointed / dagger-like (S. stylata). Scale bar: 20 µm.
Figure 16 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 16 LM images of the trophi. A, B Cauda (arrows) and fulcrum (dashed arrow) A very thin and slender cauda (S. kitina) B cauda medium with a large distal knob, fulcrum with dorsal thickening and ventral lamella (S. grimpei). Scale bar: 25 µm.
Figure 14 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 14 Trophi. A–G Morphology of the ramus ("unci") teeth A teeth absent (S. pectinata) B teeth absent, margin slightly corrugated (S. stylata) C no distinct teeth, only a serrated plate, frontal hook with a spine (arrow; S. vorax) D one to two teeth are sharply pointed and remainder are blunt (S. verrucosa) E teeth distinctly incised, frontal hook with a spine (S. gyrina) F dorsal teeth distinctly incised and ventral comb-like (S. triophthalma) G dorsal teeth comb-like and ventral distinctly incised, frontal hook with a spine (arrow; S. baltica) H–J Shape and breadth (double headed-arrow) of the lateral fulcrum H blade-like, narrow, distal end not oblique (S. tremula) I machete-like, narrow, distal end oblique (dashed arrows; S. oblonga) J axe-shaped to semi-circular, broad to very broad, distal end oblique (dashed arrows; S. longipes) K–L Shape of the hypopharynx K small to medium, robust (S. tremula) L broad to very broad, laterally pointed / dagger-like (S. stylata) M–R Shape of the cauda of the manubrium M of even width (S. baltica) N slightly decreasing distally (S. pectinata) O with a small knob-like thickening distally (S. hutchingsi) P with a large knob-like thickening distally (S. grimpei) Q oar blade shaped at the distal half (S. oblonga) R cauda spatulate or kinked distally (S. glacialis). Drawings modified from: DStemberger (1979) (sub. S. asymmetrica Koch-Althaus) and Jersabek et al. (2003a)RFriedrich and De Smet (2000).
Figure 13 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 13 Location and morphology of the lateral antennae. A–C Number and size of the lateral antenna(e) (arrow) A single, enlarged left lateral antenna (S. hutchingsi) B single, right lateral antenna (S. tamara) C lateral antennae paired, symmetrical, and of normal size (S. tremula) D–F Location of the lateral antenna(e) (arrows) relative to the median transversal axis (dashed line) (lateral habitus is presented as a stylized drawing that is species independent) D directly lateral (e.g., S. tremula) E ventrolateral (e.g., S. oblonga) F mid-dorsal, single antenna slightly displaced to the right of the body axis (e.g., S. tamara) G–I Location of the lateral antennae relative to the longitudinal axis (arrows) G in the posterior third of the trunk region (S. oblonga) H in the caudal-most trunk region at or near the base of the foot (S. tremula) I on lateral lobes (dashed arrow) caudally to the cloaca and in the proximal third of the foot (S. grimpei) J–L The base of the lateral antennae (detail in inset) J surrounded by a tubular epidermal fold (S. johanseni) K surrounded by a papillary epidermal fold (S. oblonga) L surrounded by a low epidermal fold (S. pectinata). Drawings modified from: BSmirnov (1933) and Friedrich and De Smet (2000)JHarring (1921).
Figure 10 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 10 Sensory system. A–C Head region showing the cerebral eye, pigment granules and the opening of the dorsal antenna A cerebral eye single, dorsal antenna opening slit-shaped (arrow; S. pectinata) B two partially fused cerebral eyes, frontal aggregations (arrow) and streams (dashed arrow) of pigment granules present (S. triophthalma) C cerebral eyes distinctly separated, dorsal antenna opening round (arrow; S. oblonga) D–H Morphology of the apical receptors (thickened lines, arrows) D receptors slightly separated, situated on a slight elevation centrally on the apical field (S. oblonga) E receptors incompletely separated, situated on a strong elevation centrally on the apical field (S. grandis) F receptors distinctly separated, each situated on a bulge (S. triophthalma) G receptors distinctly separated, each situated on a strong tentacle-like elevation (S. pectinata) H receptors incompletely separated, situated on a single tubular elevation (S. vorax) I–L Lengths of the lateral and dorsolateral styles (thickened lines) I minute (S. squamadigitata) J short (S. grimpei) K medium (S. pectinata) L long (S. vorax) M, N Elevation underlying the dorsal antenna (thickened lines) M not elevated to slightly elevated (S. oblonga) N distinct prominence (S. tremuloida). Drawings modified from: IDe Smet (2006).
Figure 11 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 11 Cerebral eye and pigment granules. A–CLM images with regard to the cerebral eye (dashed arrows), frontal aggregations and streams of pigment granules (normal arrows) A Distinct frontal aggregations of pigment granules present, cerebral eye of normal size (S. triophthalma) B Frontal aggregations and streams of pigment granules are absent, cerebral eye of normal size (S. pectinata) C distinct streams of pigment granules are present, large cerebral eye (S. baltica). Scale bar: 20 µm.
Figure 12 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 12 Dorsal antenna. A, B REM images of the basal opening of the dorsal antenna A slit-shaped (S. pectinata) B round (S. tremula). Scale bar: 10 µm.
Figure 1 from: Wilke T, Ahlrichs WH, Bininda-Emonds ORP (2019) A weighted taxonomic matrix key for species of the rotifer genus Synchaeta (Rotifera, Monogononta, Synchaetidae). ZooKeys 871: 1-40. https://doi.org/10.3897/zookeys.871.36435
Figure 1 Species of Synchaeta from freshwater habitats. AS. pectinataBS. grandisCS. oblongaDS. tremulaES. tremuloidaFS. prominulaGS. kitinaHS. stylataIS. longipesJS. verrucosaKS. lakowitzianaLS. pachypoidaMS. pachypoda. Drawings modified from: F, L, MKutikova and Vassiljeva (1982)JJersabek et al. (2003b)KLucks (1930). Scale bar: 100 µm.
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