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31 results for “Physidae”
Fig. 2 in Surviving at the edge of land: finding of the limnetic snail Sibirenauta sibirica (Gastropoda: Physidae) on the coast of the Laptev Sea (Eastern Siberia)
Fig. 2. Shell and anatomy of Sibirenauta sibirica, Tyulahk-Kuel Lake. A – shell, B – body extracted from the shell, C – copulatory apparatus, D, E – female reproductive system. A–D – organs of the same specimen. ag – albumen gland, bc – bursa copulatrix, с – caecum, o – oviduct, v – vagina. Scale bars: 5 mm (A–B), 2 mm (C–E).
Fig. 1 in Surviving at the edge of land: finding of the limnetic snail Sibirenauta sibirica (Gastropoda: Physidae) on the coast of the Laptev Sea (Eastern Siberia)
Fig. 1. Collecting sites of Sibirenauta sibiraca. A – Tyulahk-Kuel Lake, B – small pool on the coast of Tiksi Bay. Photographs by A. Nekhaeva.
Figure 8 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 8. Variation of environmental variables on the impacted stream of Vila do Abrãao. For rainfall was used the data from the city of Rio de Janeiro. A – water temperature, B – pH, C – conductivity, D – water deep, and E – rainfall.
Figure 7 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 7. Population variation of Physa acuta, divided in size class, through the time in Ilha Grande. Feb = February, Apr = April, Jun = June, Sep = September, Nov = November.
Figure 3 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 3. Variation of the abundance of Physa acuta in the eight collecting stations (CS) that was established on an impacted stream of Ilha Grande, along the monitoring time.
Figure 6 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 6. The overall size class of Physa acuta representation found on the population of Ilha Grande.
Figure 1 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 1. Map of the Vila do Abraão (Ilha Grande, Angra dos Reis, Rio de Janeiro), highlighting the studied stream (blue line) and the eight collecting stations (CS; red dots).
Fig. 1 in The architecture of the physid musculature of Physa acuta Draparnaud, 1805 (Gastropoda: Physidae)
Fig. 1. (A) Dorsal view of P. acuta with all visceral structures removed to show the broad insertion of the physid muscle s.s. (Pm) in the columellar muscle (Cm) in the snail foot. The Cm has two pedal horns that run anteriorly towards the head while the thicker posterior part runs a short distance towards the tail. The anterior horns start as thick bundles but taper as they near the head. (B) Dorsal view of P. acuta with its visceral hump removed to show the Pm and its five branches numbered Pm1–5. Pm1 runs anteriorly from the origin to the neck and head, Pm2 across the neck to the left hand side of the head, Pm3 and Pm4 descend to the left side of the body and Pm5 wraps around the Cm before passing anteriorly, also to the left hand side of the body. The columellar muscle was not drawn but is located inside the loop made by Pm5. (C) Dorsolateral view of P. acuta with the skin and visceral hump removed. The branches of the Pm are seen coming from right to left over the anterior part of body, intertwining as they do so with Cm fibres that run from the middle to the anterior part of the body. Pm fibres are overlain by Cm fibres. (D) Lateral view of P. acuta showing the location of Pm branches 2–5 within the snail body where they overlie each other. Pm1 is obscured. The fan muscle (Pf) radiates posteriorly from its origin on the physid muscle s.s. (Pm) to a diffuse insertion beneath the mantle.
Fig. 4 in The architecture of the physid musculature of Physa acuta Draparnaud, 1805 (Gastropoda: Physidae)
Fig. 4. (A) Lateral view of P. acuta showing the columellar muscle (Cm) and its relationship with the female and male pores. Also shown are Cm branches running towards the head and side, the insertion of Cm into the foot and the posterior part of the Cm that attaches to the shell. (B) Lateral view of P. acuta showing the relationship between the Pm (dotted line), the Cm, fan muscle (Pf) and the pneumostome–mantle band" of fibres (Pp) on the roof of the mantle. (C) Dorsal view of P. acuta (visceral hump removed) showing the relationship between the branches Pm2–Pm5 of the physid muscle s.s. associated with the 'cervical septum' (dotted lines) and the columellar muscle (Cm).
Fig. 2 in The architecture of the physid musculature of Physa acuta Draparnaud, 1805 (Gastropoda: Physidae)
Fig. 2. (A) Dorsal view of P. acuta showing the muscles overlying the lung floor, viz. thin bands of fibres (Plu) from the main trunk of the physid muscle s.s. (Pm) and from the columellar muscle (Cm). The anterior corner of the pneumostome is indicated in the lower mid-portion of the visceral hump but is not drawn. (B) Lateral view of P. acuta showing the pneumostome–mantle band of muscle fibres (Pp). This band runs from the left anterior part of the mantle roof (i.e. the anterior corner of the pneumostome) towards the right hand side of the roof, anchoring on the fan muscle (see also Fig. 2C). (C) Floor of the mantle cavity after removal of the lung tissue, showing in its mid-portion the pneumostome–mantle band of muscle fibres (Pp) that seems to give support to the opening of the pneumostome. The uppermost of these fibres converge at the edge of the mantle collar and immediately below are those (removed) that support the kidney.
Fig. 3 in The architecture of the physid musculature of Physa acuta Draparnaud, 1805 (Gastropoda: Physidae)
Fig. 3. (A) Transverse view of the body at the level of the lung floor as seen from below showing the physid muscle s.s. (Pm) and columellar muscle (Cm). Fibres from the Pm (Plu) and columellar muscle (Cm) cross the lung floor (fine detail indicated in upper right hand corner of the lung floor). The lung floor is surrounded by mantle collar tissue. (B) Dorsal view of P. acuta with the visceral hump removed to show the dorsal components of the columellar muscle (Cm). These have been flattened slightly. No detail is shown on the lung floor. (C) Above – dissection of the columellar muscle (Cm) and its four elements (slightly flattened). Below – detail of Cm overlying Pm4 and Pm5 fibres as they pass into the foot.
Fig. 4 in Re-examination of Physa mosambiquensis Clessin, 1886 and its relationship with other Aplexinae (Pulmonata: Physidae) reported from Africa
Fig. 4. Map of south-eastern Africa showing Tete, Mozambique, where syntypes of P. mosambiquensis were collected by Peters in the 1840s (Connolly 1925, 1939), relative to the localities where P. marmorata has been collected since 1986. Most localities are contained within the 200 m altitudinal contour.
Fig. 2 A–D in Re-examination of Physa mosambiquensis Clessin, 1886 and its relationship with other Aplexinae (Pulmonata: Physidae) reported from Africa
Fig. 2 A–D. Physa mosambiquensis: (A, B) published drawings: (A) fig. 4 (pl. 54) of Clessin (1886), (B) fig. 23 of Connolly (1925); (C, D) photographs of two syntypes: (C) 'shuttle-shaped' shell, (D) truncated shell.
Fig. 3 in Re-examination of Physa mosambiquensis Clessin, 1886 and its relationship with other Aplexinae (Pulmonata: Physidae) reported from Africa
Fig. 3. ESEM micrograph of the spire of a syntype shell of P. mosambiquensis showing the sutural belt indicated by an arrow. Scale bar = 500 µm.
Figure 4 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 4. The overall abundance of Physa acuta on the eight collecting stations (CS).
Figure 5 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 5. Relationship of shell height and width of Physa acuta from Ilha Grande.
Figure 2 in The introduction of Physa acuta (Gastropoda: Physidae) on Ilha Grande, Southeast Brazil, from initial stages to an established population
Figure 2. Variation of the total abundance of Physa acuta in an impacted stream of Ilha Grande.
FIGURE 4 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 4. Ranges of occurrence of species of the family Physidae. 1—P. acuta, 2—A. hypnorum, 3—P. gyrina, 4—P. fontinalis (Feliksiak 1939; Adam 1960; Backhuys 1975, Vidal Abarca & Suarez 1986; Lisický 1991; Anderson 1996, 1997;Turner et al. 1998; Cossignani & Cossignani 1995; Kerney 1999; Anderson 2003; Beran 2004; Bank 2006; Yildirim et al. 2006; Son 2007; Horsȃk et al. 2010; Glöer & Diercking 2010; CABI Data Mining 2011; Bódis et al. 2012; Laenko 2012; Van Damme et al. 2012; Welter-Schultes 2012; Glöer 2015; Vinarski et al. 2015; Raković et al. 2016; Piechocki & Wawrzyniak-Wydrowska 2016; Moroz et al. 2017; Cieplok & Spyra 2020; www.faunaeuropea.org; http://www.animalbase.uni-goettingen.de).
FIGURE 7 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 7. Characteristic features of P. gyrina with special emphasis on the white lip (10.18150/WOIHYB) (Phot. M. Gawlak).
FIGURE 3 in Morphological diversification of alien and native aquatic snails of the genus Physa and Aplexa (Gastropoda: Physidae) of Western and Central European range
FIGURE 3. Scanning electron microscopy image of A. hypnorum shell (10.18150/UFOMHM) A, B—front (with visible lip) and back side of the shell, C—projecting lamellar crystals on the lip (Phot. A—C M. Gawlak).
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OpenNeuro
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