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41 results for “narrow-range endemic”
Fig. 4 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 4. Ptilototheca soutpansbergensis gen. et sp. nov. A–D. Holotype, diameter 9.2 mm (NMSA V5567/ T4069). E. Protoconch showing sculpture of punctate spiral lines, Entabeni Forest (paratype, NMSA P0186/T4063). F. SEM of protoconch microsculpture, Thathe Vondo Forest (paratype, NMSA W2080/ T4064). Scale bars: E = 0.5 mm; F = 250 µm.
Fig. 13 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 13. Sheldonia wolkbergensis sp. nov., holotype, diameter 7.7 mm, height 5.2 mm (NMSA P0156/ T4074).
Fig. 1 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 1. Gulella davisae sp. nov. A–D. Holotype, height 6.1 mm, diameter 2.9 mm (NMSA P0418/ T4086). E. Juvenile specimen showing apertural dentition, diameter 2.7 mm (paratype, NMSA P0235/ T4091).
Fig. 3 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 3. Gulella hadroglossa sp. nov. A–E. Holotype, height 3.0 mm, diameter 1.5 mm (NMSA P0230/ T4084). F–G. Juvenile specimen showing apertural dentition, diameter 1.5 mm (paratype, NMSA P0417/T4085).
Fig. 10 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 10. Sheldonia monsmaripi sp. nov., living animals. A–B. Mariepskop Forest Reserve, mist-belt forest, shell diameter 11.6 mm (paratype, NMSA P0276/T4073). C–D. Mariepskop Forest Reserve, summit fynbos, shell diameter 16.3 mm (NMSA P0278).
Fig. 7 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 7. Ptilototheca soutpansbergensis gen. et sp. nov., genitalia. A. Entire genital system. B. Basal portion of penis opened to show penial verge and coarsely papillate preputial region. C. Flagellum and epiphallus. D. Spermatophore. A–C. Paratype, NMSA P0304/T4060. D. Paratype, NMSA W2259/T4067.
Fig. 6 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 6. Ptilototheca soutpansbergensis gen. et sp. nov., radula, holotype (NMSA V5567/T4069). A. Rachidian and left lateral teeth. B. Rachidian and innermost lateral teeth. C. Inner left marginal teeth. D. Outer left marginal teeth. Scale bars: A, C = 50 µm; B, D = 25 µm.
Fig. 15 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 15. Sheldonia wolkbergensis sp. nov., radula, holotype (NMSA P0156/T4074). A. Rachidian and lateral teeth. B. Rachidian and innermost lateral teeth. C. Inner marginal teeth. D. Outer marginal teeth. Scale bars: A–C = 50 µm; D = 25 µm.
Fig. 2 in Arganiella Giusti & Pezzoli, 1980 (Caenogastropoda: Truncatelloidea: Hydrobiidae): a widespread genus or several narrow-range endemic genera?
Fig. 2. Shells, operculum and radulae of Docleiana tabanensis (Boeters, Glöer & Pešić, 2014) (UGSB 18847). A–C. Shells. D–E. Operculum (D = inner side; E = outer side). F. Protoconch. G–I. Radulae. G. Portion of radula ribbon. H. Central radular teeth. I. Inner and outer marginal teeth.
Fig. 1 in Arganiella Giusti & Pezzoli, 1980 (Caenogastropoda: Truncatelloidea: Hydrobiidae): a widespread genus or several narrow-range endemic genera?
Fig. 1. Maximum likelihood tree based on the combined (COI, 18S) dataset. Statistical support of the nodes is indicated when Bayesian posterior probabilities ≥ 0.95 and bootstrap supports ≥ 75% (black dots). On the right, the morphology of shell, penis and distal female genitalia is presented for: a) Arganiella wolfi Boeters & Glöer, b) A. pescei Giusti & Pezzoli, 1980 and c) A. tabanensis Boeters, Glöer & Pešić, 2014. Reproductive organs were re-drawn from Arconada & Ramos (2007a), Bodon et al. (2001) and Boeters et al. (2014) for the three species, respectively. Scale bar below topology: substitutions per site.
Figs 6–11 in Four new narrow-range endemic species of Gulella from Eastern Cape, South Africa (Mollusca: Pulmonata: Streptaxidae)
Figs 6–11. Gulella dejae sp. n., holotype. 6, 7, apertural and lateral views of shell, length = 2.8 mm; 8, enlarged view of the aperture, bar = 0.3 mm; 9, umbilical region, bar = 0.3 mm; 10, detail of sculpture (start of last whorl), bar = 50 µm; 11, microsculpture on embryonic shell, bar = 40 µm.
Figs 1–5 in Four new narrow-range endemic species of Gulella from Eastern Cape, South Africa (Mollusca: Pulmonata: Streptaxidae)
Figs 1–5. Gulella hamerae sp. n., holotype. 1, 2, apertural and lateral views of shell, length = 2.7 mm; 3, oblique view into aperture, bar = 0.25 mm; 4, detail of sculpture (start of last whorl), bar = 100 µm; 5, microsculpture on embryonic shell, bar = 100 µm.
Figs 18–23 in Four new narrow-range endemic species of Gulella from Eastern Cape, South Africa (Mollusca: Pulmonata: Streptaxidae)
Figs 18–23. Gulella newmani sp. n., holotype. 18, 19, apertural and lateral views of shell, length = 3.68 mm; 20, enlarged view of the aperture, bar = 0.5 mm; 21, umbilical region, bar = 0.25 mm; 22, detail of sculpture (first quarter of last whorl, bar = 75µm; 23, microsculpture on embryonic shell, partly eroded, bar = 30µm.
Fig. 14 in New narrow-range endemic land snails from the sky islands of northern South Africa (Gastropoda: Streptaxidae and Urocyclidae)
Fig. 14. Sheldonia wolkbergensis sp. nov., holotype, shell diameter 7.7 mm (NMSA P0156/T4074).
Spatiotemporal population dynamics of the Caddo Madtom (Noturus taylori), a narrow-range endemic of the Ouachita Highlands
<p>The Caddo Madtom, Noturus taylori, is endemic to three river drainages of the Ouachita Highlands in the southeastern United States. Conservation concern for N. taylori has been heightened by recent studies based on analyses of allozyme data suggesting population decline and a possible extirpation event, which lead to N. taylori petitioned for listing under the Endangered Species Act in 2011. The objective of this study was to determine if contemporary factors, historic processes, or a combination of both, using microsatellite DNA loci and mitochondrial (mt) DNA, have influenced patterns of genetic structuring for N. taylori to better inform conservation management strategies. Phylogeographic and Bayesian cluster analyses suggest that genetic structuring between Caddo and Ouachita river drainages was shaped by historical processes prior to construction of reservoir dams that dissect the drainages. We found no evidence that reservoir dams influenced contemporary patterns of genetic structure, thus it is likely that larger river courses, and life-history characteristics conducive to headwater habitats, play important roles in limiting gene flow between drainages, and to some extent within drainages. Genetic diversity of N. taylori was relatively high compared to other endangered madtom species; however, compared to the Ouachita River population, genetic diversity was significantly lower for the Caddo River population. Collectively, these results suggest that N. taylori populations are not heavily impaired, and the genetic variation and structuring is most attributable to historic processes. However, the endemic status and narrowly fragmented distribution still renders N. taylori populations vulnerable to extirpation or extinction by stochastic events.</p>
Fig. 24 in Four new narrow-range endemic species of Gulella from Eastern Cape, South Africa (Mollusca: Pulmonata: Streptaxidae)
Fig. 24. Map of northern Eastern Cape showing distribution of new species.
Spatiotemporal population dynamics of the Caddo Madtom (Noturus taylori), a narrow-range endemic of the Ouachita Highlands
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FIGURE 2 in On the generic placement of the narrow-range endemic ' Helix ' arguineguinensis Seddon & Aparicio, 1998 from Gran Canaria (Canary Islands)
FIGURE 2. Shells of Monilearia (Monilearia) arguineguinensis (Seddon & Aparicio, 1998). A) Spain, Canary Islands, Gran Canaria, settlement E of Argüineguin, 27°45'38'' N, 15°40'04'' W, 50 m a.s.l., leg. E. Schlegel (ZMH 92264), B) Spain, Canary Islands, Gran Canaria, coll. Melvill-Tomlin, ex Wollaston (NMW 1955.158.02113), C) Spain, Canary Islands, Gran Canaria, Argüineguin, syntype coll. Mousson, ex Wollaston (ZMZ 505021). Photographs: A) F. Walther, B) Copyright Amgueddfa Cymru - National Museum Wales C) Copyright CSCF Neuchâtel, E. Neubert. Scale bar: 5 mm.
Supplementary material 3 from: Artaev ON, Turbanov IS, Bolotovskiy AA, Gandlin AA, Levin BA (2024) Taxonomic revision of Phoxinus minnows (Leuciscidae) from Caucasus, with description of a new narrow-ranged endemic species. Zoosystematics and Evolution 100(1): 291-308. https://doi.org/10.3897/zse.100.115696
Meristic and qualitative characters of Phoxinus adagumicus sp. nov., P. chrysoprasius, P. colchicus and other Phoxinus species published in the literature
Supplementary material 2 from: Artaev ON, Turbanov IS, Bolotovskiy AA, Gandlin AA, Levin BA (2024) Taxonomic revision of Phoxinus minnows (Leuciscidae) from Caucasus, with description of a new narrow-ranged endemic species. Zoosystematics and Evolution 100(1): 291-308. https://doi.org/10.3897/zse.100.115696
Primary morphological data of Phoxinus adagumicus sp. nov. from type locality (Pryamaya Shchel River)
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