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1,669 results for “Isopod”
Investigating terrestrial isopod abundance in sandplain grassland using a multiple linear regression
<p>Most North American species of terrestrial isopod (Isopoda) have been introduced from Europe. Sandplain grassland is a globally rare habitat that is abundant on Nantucket Island, Massachusetts and the abundance of terrestrial isopods in the habitat has never been studied. The objective of this project was to develop a model to explain isopod abundance based on vegetation characteristics within Sandplain grassland and use this model to test for land management effects (prescribed burning and mowing) on isopod abundance. I counted terrestrial isopods from 175 pitfall traps set for one week and used multiple linear regression with several selection algorithms to select the best model. The vegetation characteristics I used as regressors do not appear to explain terrestrial abundance well and the final model only contains the percent grass coverage as a regressor. The model suggests that terrestrial isopods decrease in abundance with increasing grass coverage and it explains 29 percent of the data. When management effects are incorporated, the model suggests that mowing significantly increases isopod abundance.</p> <p>Funding for this project came from the Nantucket Islands Land Bank, Nantucket Land Council, and the Nantucket Biodiversity Initiative.</p> <p>Associated vegetation data is in the published "Effects of Sandplain Grassland Management on Spider Richness and Abundance on Nantucket Island" dataset. Sampling methods are in the thesis linked from that dataset.</p> <p>allisopodData.csv - isopod counts by trap<br> dataDictionary.csv - descriptions of variables<br> mckenna-foster_2009.pdf - a report submitted to NBI and used as part of a statistics class at the University of Wisconsin-Green Bay</p> <p> </p>
Let the giants be named - Taxonomic description database for the isopod genus Bathynomus for the DELTA system
<p><span>Morphological characters have been extracted from recent relevant literature on <em>Bathynomus</em>, mainly from the six previously known species from the Atlantic Ocean and gulf of Mexico </span><span>(Magalhães and Young 2003; Lowry and Dempsey 2006; Shipley et al. 2016; Huang et al. 2022)</span><span>. To simultaneously maximize compactness and taxonomic value of the species description, mainly characters that have previously been interpreted as diagnostic at the species level have been included, omitting others which played no role in species delimitation. A taxonomic database has been newly set up using DELTA </span><span>(Dallwitz 1980, 1993; Dallwitz et al. 2006)</span><span>. Character states for all presently known Atlantic congeners have been scored to generate a natural language description and a new identification key </span><span>(Dallwitz 1974)</span><span> for the region as well as a species diagnosis. The species diagnosis has been composed based on the characters used in the identification key.</span></p> <p> </p>
Fig. 1. Study areas. A in New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves
Fig. 1. Study areas. A. Ressurgência das Areias de Água Quente, PETAR. B. Caverna Passoca Cave, PETAR. C. Vereda da Palha Cave. D. Presidente Olegário karst area. E. Surrounding area of Rio dos Pombos Cave, Povoado de Igatu. F. Rio dos Pombos Cave.
Fig. 14. Distribution map. 1 in New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves
Fig. 14. Distribution map. 1. Albosciajotajota Campos-Filho, Bichuette & Taiti sp. nov. 2. Androdeloscia akuanduba Campos-Filho, Cardoso & Taiti sp nov. 3. Atlantoscia inflata Campos-Filho & Araujo, 2015. 4. Benthana iporangensis Lima & Serejo, 1993. 5. B. longicornis Verhoeff, 1941. 6. B. olfersii (Brandt, 1833). 7. B. picta (Brandt, 1833). 8. B. taeniata Araujo & Buckup, 1994. 9. Metaprosekia igatuensis Campos-Filho, Fernandes & Bichuette sp. nov. 10. Paratlantoscia rubromarginata (Araujo & Leistikow, 1999). 11. Amazoniscus spica Campos-Filho, Aguiar & Taiti sp. nov. 12. Circoniscus bezzii Arcangeli, 1931. Light gray areas denote Brazilian conservation units. AL = Alagoas; BA = Bahia; CE = Ceará; DF = Distrito Federal; ES = Espírito Santo; GO = Goiás; MA = Maranhão; MG = Minas Gerais; MT = Mato Grosso; PA = Pará; PB = Paraíba; PE = Pernambuco; PI = Piauí; PR = Paraná; RJ = Rio de Janeiro; RN = Rio Grande do Norte; SE = Sergipe; SP = São Paulo; TO = Tocantins.
Fig. 10 in New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves
Fig. 10. Metaprosekia igatuensis Campos-Filho, Fernandes & Bichuette sp. nov., ♀, paratype (LES 6349) (A) and ♂, paratype (LES 6349) (B–I). A. Uropod. B. Pereopod 1. C. Pereopod 7. D. Genital papilla. E. Pleopod 1. F. Pleopod 2. G. Pleopod 3 exopod. H. Pleopod 4 exopod. I. Pleopod 5 exopod.
Fig. 13 in New species and new records of terrestrial isopods (Crustacea, Isopoda, Oniscidea) of the families Philosciidae and Scleropactidae from Brazilian caves
Fig. 13. Amazoniscus spica Campos-Filho, Aguiar & Taiti sp. nov., ♂, paratype (MZUSP 40047). A. Pereopod 1. B. Pereopod 7. C. Genital papilla. D. Pleopod 1. E. Pleopod 2. F. Pleopod 3 exopod. G. Pleopod 4 exopod. H. Pleopod 5 exopod.
FIG. 18. — Alloschizidium labronicum n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 18. — Alloschizidium labronicum n. sp., from Maroccone, ♀ paratype: A, adult specimen, lateral view; B, dorsal scale-seta; C, cephalon, frontal view; D, cepha- lon, dorsal view; E, epimeron of pereonite 1, dorsal view; F, telson and uropods, dorsal view; G, antennula; H, antenna. Scale bar: A, 1 mm.
FIG. 16. — Trogleluma pilosa n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 16. — Trogleluma pilosa n. sp., from Poggio Capalbiaccio, ♀ paratype: A, left mandible; B, right mandible; C, maxillula; D, maxilla; E, maxilliped; F, left uropod.
FIG. 15. — Trogleluma pilosa n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 15. — Trogleluma pilosa n. sp., from Poggio Capalbiaccio, ♀ paratype: A, adult specimen, lateral view; B, dorsal scale-seta; C, cephalon, frontal view; D, cephalon, dorsal view; E, epimeron of pereonite 1, dorsal view; F, telson and uropods, dorsal view; G, antennula; H, antenna. Scale bar: A, 1 mm.
FIG. 13. — Parachizidium ferrarai n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 13. — Parachizidium ferrarai n. sp., from Gorgona, ♂ paratype: A, left mandible; B, right mandible; C, maxillula; D, maxilla; E, maxilliped; F, uropod.
FIG. 10. — Typhlarmadillidium occidentale n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 10. — Typhlarmadillidium occidentale n. sp., from Grotta del Cane di Uliveto, Monte Pisano, ♂ paratype: A, left mandible; B, right mandible; C, maxillula; D, maxilla; E, maxilliped; F, right uropod.
FIG. 8. — Moserius talamonensis n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 8. — Moserius talamonensis n. sp., from Grotta Gianninoni, Uccellina, ♂ paratype: A, pereopod 1; B, pereopod 7; C, genital papilla; D, pleopod 1; E, pleopod 2; F, pleopod 3 exopod; G, pleopod 4 exopod; H, pleopod 5 exopod.
FIG. 6. — Moserius gruberae n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 6. — Moserius gruberae n. sp., from Grotta del Cane di Uliveto, Monte Pisano, ♂ paratype: A, pereopod 1; B, pereopod 2; C, genital papilla; D, pleopod 1; E, pleopod 2; F, pleopod 3 exopod; G, pleopod 4 exopod; H, pleopod 5 exopod.
FIG. 21. — A, Leucocyphoniscus pisanus n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 21. — A, Leucocyphoniscus pisanus n. sp., ♀ paratype from Buca delle Fate di Cima Sugheretta, Monte Pisano; B, Moserius gruberae n. sp., ♀ paratype from Grotta del Cane di Uliveto, Monte Pisano; C, Moserius talamonensis n. sp., ♀ paratype from Grotta Gianninoni, Uccellina; D, Typhlarmadillidium occidentale n. sp., ♀ paratype from Grotta del Cane, Monte Pisano; E, Paraschizidium ferrarai n. sp., ♀ paratype, from Gorgona; F, Trogleluma pilosa n. sp., ♀ paratype from Poggio Capalbiaccio; G, Alloschizidium labronicum n. sp., ♀ paratype from Maroccone. Scale bars: A-D, F, G, 1 mm; E, 0.5 mm.
FIG. 3. — Leucocyphoniscus pisanus n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 3. — Leucocyphoniscus pisanus n. sp., from Buca delle Fate di Cima Sugheretta, Monte Pisano, ♂ paratype: A, pereopod 1; B, pereopod 7; C, genital papilla; D, pleopod 1; E, pleopod 2; F, pleopod 3 exopod; G, pleopod 4 exopod; H, pleopod 5 exopod.
FIG. 5. — Moserius gruberae n in New species of subterranean and endogean terrestrial isopods (Crustacea, Oniscidea) from Tuscany (central Italy)
FIG. 5. — Moserius gruberae n. sp., from Grotta del Cane di Uliveto, Monte Pisano, ♂ paratype: A, left mandible; B, right mandible; C, maxillula; D, maxilla; E, maxilliped; F, left uropod.
Figure 25 in New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific
Figure 25. Thysanoserolis orbicula sp. n. Holotype. A dorsal view B lateral view C head, frons and antennae, ventral view D head, anterior margin E pleon and pleotelson, ventral view F coxae 2–5, ventral G right mandible H left mandible I maxilliped Į maxilliped palp.
Figure 22 in New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific
Figure 22. Myopiarolis systir sp. n. Paratype 3 11.4 mm, Is.6013, except H, holotype. A–D pereopods 1 2, 6 and 7 respectively a detail of pereopod 1 propodal palm setae E pereopod 2 carpus and propodus F pereopod 6 carpus and propodus.
Figure 7 in New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific
Figure 7. Sedorolis simplex sp. n. Paratype 3 4.8 mm, Is.6001, except E, F ♀ unmeasured, Is. 6004. A–D pereopods 1, 2, 6 and 7 respectively a detail of pereopod 1 propodal palm setae E pereopod 1 dactylus F pereopod 2 propodus, mesial G pereopod propodus, lateral.
Figure 8 in New genera and species of the marine isopod family Serolidae (Crustacea, Sphaeromatidea) from the southwestern Pacific
Figure 8. Sedorolis simplex sp. n. Paratype 3 4.8 mm, Is.6001. A–E pleopods 1–5 respectively F uropods.
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International Brain Laboratory public data
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OpenNeuro
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