top of page

Papers

(*) Selected publications

2023

 

60. Bisneto, P., Frazão, L., Ceron, K., Sachett, J., Monteiro, W.M., Kaefer, I.L., Guedes, T.B. (2023) The challenge in detecting risk areas of snakebite when case rates are low: the case of Amazonian coral snakes. Anais da Academia Brasileira de Ciências 95: e20230565 (PDF)

59. Duque, B.R., Bruno, S.F., Ferreira, V., Guedes, T.B., Machado, C., Hamdan, B. (2023) Venomous snakes of medical importance in the Brazilian state of Rio de Janeiro: habitat and taxonomy against ophidism. Brazilian Journal of Biology 83: e272811 (PDF)

58. Araújo, S.C.M., Câmara, J.T., Guedes, T.B. (2023) Snakebites in Northeastern Brazil: accessing clinical-epidemiological profile as a strategy to deal with Neglected Tropical Diseases. Journal of the Brazilian Society of Tropical Medicine 56: e0224-2023.  (PDF)

57. *Williams, J.W., Taylor, A., Tolley, K.A., Provete, D.B., Correia, R., Guedes, T.B., Farooq, H., Li, Q., Pinheiro, H.T., Liz, A.V., Luna, L.W., Matthews, T.J., Palmeirim, A.F., Puglielli, G., Rivadeneira, M.M., Rovin, V.V., Schrader, J., Shestakova, T.A., Tukiainen, H., Heyden, S., Zizka, A. (2023) Shifts to open access with high article processing charges hinder research equity and careers. Journal of Biogeography 00: 1-5. (PDF)

56. *Guedes, T.B., Entiauspe-Neto, O.M., Costa, H.C. (2023) Lista de répteis do Brasil: atualização de 2022. Herpetologia Brasileira 1: 56-161. (PDF)

55. *Guedes, T.B., Diniz-Filho, J.A., Diele-Viegas, L.M., Tonini, J.F., Antonelli, A. (2023). Invest in early-career researchers in Brazil. Science 379: 448. (PDF)

2022

54. *Ralimanana, H., Perrigo, A.L., Smith, R.J., Borrel, J.S., Faurby, S., Rajaonah, M.T., Randriamboavonjy, T., Vorontsova M.S., Cooke, R.S.C., Phelps, L.N., Sayol, F., Andela, N., Andermann, T., Andriamanohera, A.M., Andriambololonera, S., Bachman, S.P., Bacon, C.D., Baker, W.J., Belluardo, F., Birkinshaw, C., Cable, S., Canales, N.A., Carrillo, J.D., Clegg, R., Clubbe, C., Crottini, A., Damasco, G., Dhanda, S., Edler, D., Farooq, H., Ferreira, P.L., Fisher, B.L., Forest, F., Gardiner, L.M., Goodman, S.M., Grace, O.M., Guedes, T.B., Hackel, J., Henniges, M.C., Hill, R., Lehmann, C.E.R., Lowry II, P.P., Marline, L., Matos-Maraví, P., Moat, J., Neves, B., Nogueira, M.G.C., Onstein, R.E., Papadopulos, A.S.T., Perez-Escobar, O.A., Phillipson, P.B., Pironon, S., Przelomska, N.A.S., Rabarimanarivo, M., Rabehevitra, D., Raharimampionona, J., Rajaonary, F., Rajaovelona, L.R., Rakotoarinivo, M., Rakotoarisoa, A.A., Rakotoarisoa, S.E., Rakotomalala, H.N., Rakotonasolo, F., Ralaiveloarisoa, B.A., Ramirez-Herranz, M., Randriamamonjy, J.E.N., Randrianasolo, V., Rasolohery, A., Ratsifandrihamanana, A.N., Ravololomanana, N., Razafiniary, V., Razanajatovo, H., Razanatsoa, E., Rivers, M., Silvestro, Testo, W., Jiménez, M.F.T., Walker, K., Walker, B.E., Wilkin, P., Williams, J., Ziegler, T., Zizka, A., Antonelli, A. 2022. Madagascar’s extraordinary biodiversity: Threats and opportunities. Science 378: eadf1466. (PDF)

 

53. *Antonelli, A., Smith, R.J., Perrigo, A.L., Crottini, A., Hackel, J., Testo, W., Farooq, H., Jiménez, M.F.T., Andela, N., Andermann, T., Andriamanohera, A.M., Andriambololonera, S., Bachman, S.P., Bacon, C.D., Baker, W.J., Belluardo, F., Birkinshaw, C., Borrel, J.S., Cable, S., Canales, N.A., Carrillo, J.D., Clegg, R., Clubbe, C., Cooke, R.S.C., Damasco, G., Dhanda, S., Edler, D., Faurby, S., Ferreira, P.L., Fisher, B.L., Forest, F., Gardiner, L.M., Goodman, S.M., Grace, O.M., Guedes, T.B., Henniges, M.C., Hill, R., Lehmann, C.E.R., Lowry II, P.P., Marline, L., Matos-Maraví, P., Moat, J., Neves, B., Nogueira, M.G.C., Onstein, R.E., Papadopulos, A.S.T., Perez-Escobar, O.A., Phelps, L.N., Phillipson, P.B., Pironon, S., Przelomska, N.A.S., Rabarimanarivo, M., Rabehevitra, D., Raharimampionona, J., Rajaonah, M.T., Rajaonary, F., Rajaovelona, L.R., Rakotoarinivo, M., Rakotoarisoa, A.A., Rakotoarisoa, S.E., Rakotomalala, H.N., Rakotonasolo, F., Ralaiveloarisoa, B.A., Ramirez-Herranz, M., Randriamamonjy, J.E.N., Randriamboavonjy, T., Randrianasolo, V., Rasolohery, A., Ratsifandrihamanana, A.N., Ravololomanana, N., Razafiniary, V., Razanajatovo, H., Razanatsoa, E., Rivers, M., Sayol, F., Silvestro, D., Vorontsova M.S., Walker, K., Walker, B.E., Wilkin, P., Williams, J., Ziegler, T., Zizka, A., Ralimanana, H. 2022. Madagascar’s extraordinary biodiversity: Evolution, distribution, and use. Science 378: eabf0869. (PDF)

52. *Cabral, H., Guedes, T.B., Santana, D.J. (2022) Functional traits and phylogeny explain snake distribution in the world's largest dry forest ecoregion, the Gran Chaco. Ecology and Evolution 12: 12:e9503. (PDF)

51. Uchôa, L.R., Delfim, F.R., Mesquita, D.O., Colli, G.R., Garda, A.A., Guedes, T.B.  (2022) Lizards (Reptile: Squamata) from the Caatinga, northeastern Brazil: detailed and updated overview. Vertebrate Zoology 72: 599-659. (PDF)

 

50. Entiauspe-Neto, O.M., Koch, C., Guedes, T.B., Paredero, R.C.B., Tiutenko, A., Loebmann, D. (2022) Unveiling an enigma from the Cerrado: Taxonomic revision of two sympatric Apostolepis Cope, 1862 species (Dipsadidae: Xenodontinae: Elapomorphini) from central Brazil. European Journal of Taxonomy 817: 143-182. (PDF)

49. *Araújo, S.C.M., Ceron, K., Guedes, T.B. (2022) Use of geospatial analyses to address snakebite hotspots in mid-northern Brazil - a direction to health planning in shortfall biodiversity knowledges areas. Toxicon 213: 43-51. (PDF)

2021

48. *Costa, H.C., Guedes, T.B., Bérnils, R.S. (2021) Lista de répteis do Brasil: padrões e tendências. Herpetologia Brasileira, 10: 103-279. (PDF)

47. Queiroz, A.M., Tôrres, A., Barros, M.C., Guedes, T.B. (2021) Extension of occurrence and geographic distribution map of the toad Rhinella dapsilis (Myers & Carvalho, 1945) (Amphibia: Bufonidae) in the mid-north region of Brazil. Herpetologia Brasileira, 10: 77-85. (PDF)

46. Pereira-Filho, G., Freitas, M.A., Vieira, W.L.S., Moura, G.J.B., Guedes, T.B., França, F.G.R. (2021) The snake fauna of the most threatened region of the Atlantic Forest: natural history, distribution, species richness and a complement to the Atlas of Brazilian snakes. Ethnobiology and Conservation, 10: 38. (PDF)

45. Marques, R., Guedes, T.B., Lanna, F.M., Passos, D.C., Silva, W.P., Garda, A.A. (2021) Species richness and distribution patterns of the snake fauna of Rio Grande do Norte state, northeastern Brazil. Anais da Academia Brasileira de Ciências, 93: e20191265. (PDF)

44. Messas, Y.F., D'Angelo, G.B., Guedes, T.B., Vasconcellos-Neto, J. (2021) Integrating citizen nature photography to natural history science: New record of bird-lizard predation. Austral Ecology, 00: 000–000. (PDF)

43. Ceron, K., Mângia, S., Guedes, T.B., Alvares, D.J., Neves, M.O., Moroti, M.T., Torello, N., Borges-Martins, M., Ferreira, V.L., Santana, D.J. (2021) Ecological niche explains the sympatric occurrence of lined ground snakes of the genus Lygophis (Serpentes, Dipsadidae) in the Southn American Dry Diagonal. Herpetologica, 77: 000–000. (PDF)

42. *Narváez-Gomes, J.P., Guedes, T.B., Lohmann, L.G. (2021) Recovering the drivers of sampling bias in Bignonieae (Bignoniaceae) and identifying priority areas for new survey efforts. Biodiversity and Conservation, 30: 2319–2339. (PDF)

41. Entiauspe-Neto, O.M., Koch, C., Harvey, M.B., Colli, G.R., Guedes, T.B. (2021) Redescription of Apostolepis ambiniger (Peters, 1869) (Serpentes: Dipsadidae: Elapomorphini). Vertebrate Zoology, 71: 231–251. (PDF)

40. Rojas-Morales, J.A., González, J.V., Cepeda-Duque, J.C., Marín-Martínez, M., Días-Ayala, R.F., Guedes, T.B. (2021) On delicate nighhunters: observations of the feeding behavious of Imantodes cenchoa (Linnaeus, 1758) and Sibon nebulatus (Linnaeus, 1758) through staged and natural encounters (Serpentes: Dipsadidae: Dipsadinae). Herpetology Notes, 14: 717–723. (PDF)

39. Hamdan, B., Ferreira, V., Rossi, B., Bruno, S.F., Guedes, T.B. (2021) First case of melanism in Bothrops jararaca (Wied-Neuwiedi, 1824) with comments on melanic tendencies in cooler regions within the Brazilian Atlantic Forest (Serpentes: Viperidae). Herpetology Notes, 14: 629–637. (PDF)

38. Gonzalez, R.C., Guedes, T.B., Passos, P. (2021) Back in time to unlock the future: tracing the type-specimens of Corallus hortulana (Linnaeus, 1758) (Serpentes: Boidae), with designation of a lectotype for the Amazon tree boa. Zootaxa, 4941: 259–270. (PDF)

37. Entiauspe-Neto, O.M., Koch, C., Gray, R.J., Tiutenko, A., Loebmann, D., Guedes, T.B. (2021) Taxonomic status of Apostolepis tertulianobeui Lema, 2004 based on an integrative revision of Apostolepis assimilis (Reinhardt, 1861) (Serpentes: Dipsadidae). Zoologischer Anzeiger, 291: 123–138. (PDF)

36. Slobodian, V., Soares, K.D.A., Falaschi, R.L., Prado, L.R., Camelier, P., Guedes, T.B., Leal, L.C., Hsiou, A.S., Del-Rio, G., Costa, E.R., Pereira, K.R.C., D’Angiolella, A.B., Susa, S.A., Diele-Viegas, L.M. (2021) Why we shouldn’t blame women for gender disparity in academia: Perspectives of Women in Zoology. Zoologia, 38: e61968. (PDF)

35. Guedes, T.B. (2021) A matryoska of scales: a single specimen reveals multiple new aspects of diet and distribution of snakes. Herpetology Notes, 14:385–390. (PDF)

34. Pomar-Gómez, A.D., Cordeiro, P., Guedes, T.B., Passos, P. (2021) The striking endemism pattern of the species-richest genus Atractus (Dipsadidae: Serpentes) higlights the hidden diversity in the Andes. Amphibia-Reptilia, 42:189–200. (PDF)

 

2020

 

33. Guedes, T.B., Oliveira, G. (2020) Rediscovery of the snake Siphlophis pulcher (Raddi, 1820) (Serpentes: Dipsadidae: Pseudoboini) in the state of Paraná, southern Brazil. Herpetologia Brasileira, 9: 134–138. (PDF)

 

32. Entiauspe-Neto, O.M., Rangel, G.F., Guedes, T.B., Tiutenko, A. (2020) Raising of Lazarus: Rediscovery and redescription of Apostolepis niceforoi Amaral, 1935 (Serpentes: Dipsadidae: Elapomorphini). Holotipus, 2: 21–35. (PDF)

31. Entiauspe-Neto, O.M., Koch, C., Guedes, T.B., Tiutenko, A. (2020) Revisiting the taxonomic status of Apostolepis sanctaeritae, a forgotten Neotropical dipsadid snake. Salamandra, 56: 329–341. (PDF)

 

30. Barbosa, D.B.S., Lima, M.S.C.S., Guedes, T.B. (2020) First record of Thamnodynastes almae Franco & Ferreira, 2002 (Serpentes, Dipsadidae, Xenodontinae) in the state of Piauí, northeastern Brazil, and updated distribution map. Check List, 16: 1323–1328. (PDF)

 

29. Guedes, T.B., Guedes, A. (2020) Notes on court and copula, fertility, nest, eggs and hatchlings of the Caatinga’s Black snake Boiruna sertaneja Zaher, 1996 (Serpentes: Dipsadidae) from northeastern Brazil. Anais da Academia Brasileira de Ciências, 92: e20190588. (PDF)

28. Entiauspe-Neto, O.M., Guedes, T.B., Loebmann, D., Lema, T. (2020) Taxonomic status of two simultaneously described Apostolepis Cope, 1862 species (Dipsadidae: Elapomorphini) from Caatinga Enclaves Moist Forests, Brazil. Journal of Herpetology, 54(2): 225–234.  (PDF)

 

27. Guedes, T.B., Queiroz, A., Sousa, P., Hamdan, B. (2020) Updated distribution maps with new records of Trilepida fuliginosa (Passos, Caramaschi & Pinto, 2006) and Drepanoides anomalus (Jan, 1863) (Squamata, Serpentes) in the state of Maranhão, northeastern Brazil. Check List, 16: 423–433.  (PDF)

26. Rojas-Morales, J.A., Ramírez-Chaves, H.E., Guedes, T.B. (2020) New record for Colombia, updated distribution map, and comments on the defensive behavior of Thamnodynastes dixoni Bailey & Thomas, 2007 (Serpentes, Dipsadidae, Xenodontinae). Check List, 16: 169–175. (PDF)

 

25. *Peixoto, M.A., Guedes, T.B., Silva, E.T., Feio, R.N. (2020) Biogeographic tools help to assess the effectiveness of protected areas for the conservation of anurans in the Mantiqueira mountain range, Southeastern Brazil. Journal for Nature Conservation, 54: 125799. (PDF)

 

24. *Hamdan, B., Guedes, T.B., Carrasco, P., Melville, J. (2020) A complex biogeographic history of diversification in Neotropical Lancehead pitvipers (Serpentes, Viperidae). Zoologica Scripta, 49: 145–158. (PDF)

 

23. *Azevedo, J.A.R., Guedes, T.B., Nogueira, C.C., Passos, P., Sawaya, R.J., Prudente, A.L.C., Barbo, F.E., Strussmann, C., Franco, F.L., Arzamendia, V., Giraudo, A., Argôlo, A., Jansen, M., Zaher, H., Tonini, J.F.R., Faurby, S., Antonelli, A. (2020) Museums and cradles of diversity are geographically coincident for narrowly distributed Neotropical snakes. Ecography, 43: 328–339.  (PDF)

 

2019

 

22. *Nogueira, C.C., Argôlo, A.J.S., Arzamendia, V., Azevedo, J.A., Barbo, F.E., Bérnils, R.S., Bolochio, B.E., Borges-Martins, M., Brasil-Godinho, M., Braz, H., Buononato, M.A., Cisneros-Heredia, D.F., Colli, G.R., Costa, H.C., Franco, F.L., Giraudo, A., Gonzalez, R.C., Guedes, T., Hoogmoed, M.S., Marques, O.A.V., Montingelli, G.G., Passos, P., Prudente, A.L.C., Rivas, G.A., Sanchez, P.M., Serrano, F.C., Silva Jr, N.J., Strüssmann, C., Vieira-Alencar, J.P.S., Zaher, H., Sawaya, R.J., Martins, M. (2019) Atlas of Brazilian snakes: Verified point-locality maps to mitigate the Wallacean shortfall in a megadiverse snake fauna. South American Journal of Herpetology, 14: 1–274. (PDF)

 

21. Guedes, T.B., Guedes, A., Almeida-Santos, S.M. (2019) Male-male Fighting, dominance and mating in Epicrates assisi (Serpentes: Boidae) in captivity. Phyllomedusa, 18: 131–135. (PDF)

 

20. Braz, H.B., Kasperoviczus, K.N., Guedes, T.B. (2019) Reproductive biology of the fossorial snake Apostolepis gaboi (Serpentes, Elapomorphini): a threatened and poorly known species from the Caatinga region. South American Journal of Herpetology, 14: 37–47. (PDF)

2018

 

19. Antonelli, A., Ariza, M., Albert, J., Andermann, T., Azevedo, J., Bacon, C., Faurby, S., Guedes, T., Hoorn, C., Lohmann, L.G., Matos-Maraví, P., Ritter, C.D., Sanmartín, I., Silvestro, D., Tejedor, M., ter Steege, H., Tuomisto, H., Werneck, F.P., Zizka, A., Edwards, S.V. (2018) Conceptual and empirical advances in Neotropical biodiversity research. PeerJ, 6: e5644: 1–53.  (PDF)

18. Guedes, T.B., Sazima, I., Marques, O.A.V (2018) Does swallowing a toad require any specialization? Feeding behaviour of the dipsadid snake Philodryas nattereri on the bufonid toad Rhinella jimi. Herpetology Notes, 11: 825–828. (PDF)

17. Guedes, T.B. (2018) Thamnodynastes sertanejo (NCN): Diet. Herpetological Review, 49: 356. (PDF)

16. Guedes, T.B., Barbo, F.E., França, D., Zaher, H. (2018) Morphological variation and hemipenial morphology of the rare psammophilous species Apostolepis gaboi from the sandy dunes of northeastern Brazil (Serpentes, Dipsadidae, Elapomorphini). Zootaxa, 4418: 469–480. (PDF)

15. Guedes, T.B. (2018) Xenopholis undulatus (Jensen’s ground snake): Diet. Herpetological Review, 49: 142. (PDF)

14. *Guedes, T.B., Sawaya, R.J., Zizka, A., Laffan, S., Faurby, S., Pyron, R.A., Bérnils, R.S., Jansen, M., Passos, P., Prudente, A.L.C., Cisneros-Heredia, D.F., Braz, H.B., Nogueira, C.C., Antonelli, A. (2018). Patterns, biases and prospects in the distribution and diversity of Neotropical snakes. Global Ecology and Biogeography, 27: 14–21. (PDF)

2017

 

13. Guedes, T.B. (2017) Philodryas nattereri (Paraguay Green Racer): Diet. Herpetological Review, 48 (3): 679–680. (PDF)

12. Guedes, T.B., Miranda, F., Menezes, L., Pichorim, M., Ribeiro, L. (2017) Avian predation attempts by Tropidurus hispidus (Spix, 1825) (Reptilia, Squamata, Tropiduridae). Herpetology Notes, 10: 45–47. (PDF)

11. *Edler, D., Guedes, T.B., Zizka, A., Roswall, M., Antonelli, A. (2017) Infomap Bioregions: Interactive mapping of biogeographical regions from species distributions. Systematic Biology, 66: 197–204.  (PDF)

2016

 

10. Citeli, N., Hamdan, B., Guedes, T.B. (2016) Snake richness in urban forest fragments from Niterói and surroundings, state of Rio de Janeiro, southeastern Brazil. Biodiversity Data Journal, 4: 01–41. (PDF)

 

2015

 

9. *Xavier, A.L., Guedes, T.B., Napoli, M.F. (2015) Biogeography of anurans from the poorly known and threatened Coastal Sandplains of Eastern Brazil. Plos One, 10: 1–18. (PDF)

 

2014

 

8. *Guedes, T.B., Nogueira, C., Marques, O.A.V. (2014) Diversity, natural history, and geographic distribution of snakes in the Caatinga, Northeastern Brazil. Zootaxa, 3863: 001–093. (PDF)

7. *Guedes, T.B., Sawaya, R.J., Nogueira, C.C. (2014) Biogeography, vicariance and conservation of snakes of the neglected and endangered Caatinga region, north-eastern Brazil. Journal of Biogeography, 41: 919–931. (PDF)

2011

6. Guedes, T.B., Nunes, G.S.S., Prudente, A.L.C., Marques, O.A.V. (2011) New records and geographical distribution of the Tropical Banded Treesnake Siphlophis compressus (Dipsadidae) in Brazil. Herpetology Notes, 4: 341–346. (PDF)

 

5. Guedes, T.B., Marques, O.A.V. (2011) Reptilia, Squamata, Serpentes, Dipsadidae, Tropidodryas striaticeps (Cope, 1869): Latitudinal and altitudinal extension and geographic distribution map. Check List, 7: 78–82. (PDF)

 

2010

4. Guedes, T.B. (2010) Thamnodynastes almae. Geographic distribution. Herpetological Review, 41: 245. (PDF)

2008

3. Almeida. W.O., Guedes, T.B., Freire, E.M.X., Vasconcelos, A. (2008) Pentastomid infection in Philodryas nattereri Steindachner, 1870 and Oxybelis aeneus (Wagler, 1824) (Squamata: Colubridae) in a Caatinga of Northeastern Brazil. Brazilian Journal of Biology, 68: 201–205. (PDF)

2. Ribeiro, L.B., Lisboa, C.M.C.A., Guedes, T.B., Kolodiuk, M.F., Freire, E.M.X. (2008) Tropidurus hispidus. Hatchling size. Herpetological Review, 39(1): 94–95. (PDF)

2005

 

1. Albuquerque, H.N., Guedes, T.B., Cavalcanti, M.L. (2005) Estudo dos acidentes ofídicos provocados por serpentes do gênero Bothrops notificados no estado da Paraíba. Revista de Biologia e Ciências da Terra, 5: 1–8. (PDF)

Outreach

 

Guedes, T.B. (2023) O lagartos da Caatinga: Fundamentais para os ecossistemas e o nosso bem-estar. Ciência Hoje 398: 35-40.  (PDF) 

Books

1. Marques, O.A.V., Eterovic, A. Guedes, T.B., Sazima, I. (2017) Serpentes da Caatinga. Guia Ilustrado. Cotia SP: Editora Ponto A, 240 p. (Link)

Book Chapters

4. Pereira Filho, G.A., Guedes, T.B., França, R.C., Freitas, M.A.Lourenço-de-Moraes, R., Mesquita, D.O., Nunes, P.S., Delfim, F.R., Dubeux, M.J.M., França, F.G.R. (in press) Composition, richness and conservation of the Reptiles of the highly threatened Northern Brazilian Atlantic Forest. In: Pereira Filho, G.A., França, F.G.R., Alves, R.R.N., Vasconcellos, A. (eds). Animal Biodiversity and Conservation in Brazil's Northern Atlantic Forest. Berlin, Springer.  (Link)

3. Tonini, J.F.R., Ferrari, T.B., Fenker, J., Guedes, T.B., Domingos, F.M.C.B. (2021) Os determinantes da diversidade biológica da Herpetofauna Neotropical. In: Toledo, L.F. (org.) Herpetologia Brasileira Contemporânea, 159–172. São Paulo, Sociedade Brasileira de Herpetologia. (Link)

 

2. Guedes, T.B., Azevedo, J.A.R, Bacon, C., Provete, D., Antonelli, A. (2020) Diversity, endemism, and evolutionary montane biotas outside the Andean Region. In: Rull, V., Carnaval, A. (eds). Neotropical Diversification. Berlin, Springer, 299–328.  (Link)

 

1. Azevedo, J.A.R., Collevatti, R., Bacon, C., Zizka, A., Guedes, T.B., Matos, P., Faurby, S., Carvalho, F., Carrillo, J., Jaramillo, C., Strömberg, C., Hirota, M., Antonelli, A. (2020) On the young savannas in the land of ancient forests. In: Rull, V., Carnaval, A. (eds). Neotropical Diversification. Berlin, Springer, 271–298.  (Link)

Capa_Rull & Carnaval 2020_Neotropical Diversification Patterns and Process_Springer.png
Capa_Tonini etal2021.png
Pereira Filho etal.Capa.JPG
bottom of page