THE IMPORTANCE OF ITABORAÍ BASIN () AS THE HOME TO EARLY RECORDS OF MANY PULMONATE SNAIL FAMILIES

Rodrigo Brincalepe Salvador¹ ^$:C0:RQ`8`QR`1$Q8G$I:1C8HQI_ , Luiz Ricardo Lopes de Simone¹ ^C`$1IQJV%$]8G`_ ¹Universidade de São Paulo, Museu de Zoologia (MZUSP)

RESUMO INTRODUCTION Os calcários da Bacia de Itaboraí The limestone formation of the Itaboraí (Paleoceno Médio a Superior), Rio de Janeiro, Basin at São José de Itaboraí, Rio de Janeiro, Brasil, são famosos por sua abundante fauna ,4#&65#-5 .. ,5%()1(535#.-5/((.5'''&#(5 de mamíferos, mas também possuem uma rica fauna (Bergqvist et al 865hfflC85)1 0 ,65."#-5.#(35 fauna de 17 espécies de gastrópodes pulmonados. -#(5&-)5",),-55,#"5 /(5) 51 &&7*, - ,0 5 Os registros fósseis mais antigos das famílias pulmonate snails: 18 species have been described e Strophocheilidae são de Itaboraí. .)5 . 65 '#(&35 #(5 /&#'/&# I,."&## 5 , , Ellobiidae e B#!85 g:5 #')( 5 ;5 44&#,65 goojC85 )&&)1#(!5 não possuem representantes vivos que chegam tão mammal correlations, the Itaboraí limestones are ao sul da América do Sul como no Rio de Janeiro; ()15 !, 5 .)5  5 ) 5 ** ,5 & ) ( 5 &.")/!"5 além disso, os registros de , Clausiliidae, the S1 stratigraphic sequence sensu Medeiros Cerionidae, Urocoptidae e Vertiginidae estão ;5  ,!+0#-.5 BgoooC65 1" , 5 &&5 ')&&/--5 (5  5 entre os mais antigos conhecidos no mundo. found, has been considered as Middle Paleocene Considerando esse registro tão diverso, é estranho (Medeiros & Bergqvist, 1999). Some of the que essa fauna seja pouco conhecida, já que pode molluscan species found in sequence S1 can also ajudar a responder diversas perguntas sobre  5 )/(5#(5- +/ ( 5h651" , 5." 5'$),#.35) 5 biogeografia e sistemática. the mammalian fauna is (Bergqvist et al ., 2006). Palavras-chave: Biogeografia, , .),ù]-5 ,&35 ()4)#5! 5(5&).#)(5'% 5 Rio de Janeiro its fossils critical in understanding the evolution of South American taxa and their biogeographic ABSTRACT "#-.),385 " 5 .),#(5 /(5 *, - (.-5 -)' 5 ) 5 the first record for extant molluscan families The limestones of Itaboraí Basin (Middle (5, ),-5) 5*-.5#-.,#/.#)(51" , 5." 5�#(!5 to Upper Paleocene), Rio de Janeiro, Brazil, are , &.#0 -5(5().5 5 )/(5.)35(3'), 8 famous for the abundant mammalian fauna, /.5 ." 35 &-)5 ",),5 5 ,#"5 /(5 ) 5 gm5 -* # -5 THE PULMONATE FAMILIES of pulmonate snails. The oldest fossil records of the families Orthalicidae and Strophocheilidae OF ITABORAÍ BASIN are from Itaboraí. Cerionidae, Clausiliidae,   95  ,#)(# 5 1-5 ().5 Ellobiidae and Urocoptidae do not have living *, - (.5#(5 .),ù5-#(5/(.#&5,  (.&3955, 0#-#)(5 representatives so far south in South America ) 5." 5! (/-5,-#& (( 65 ),' ,&35#(5., *.2# 65 -5 #)5  5 ( #,):5 #.#)(&&365 ." 5 , ),-5 ) 5 has placed it in Cerionidae and made it the second Charopidae, Clausiliidae, Cerionidae, Urocoptidae ! (/-5#(5." 5 '#&35 -# -5 ,#)(5B&0),5et al ., (5 ,.#!#(# 5, 5')(!5." 5)& -.5%()1(5#(5 -/'#.. C85" , 5, 5.1)5,-#& (( 5-* # -5#(5 ." 51),&85)(-# ,#(!5-/"5#0 ,- 5, ),65#.5#-5 .),ù5B5."#,5)( 51-5,  (.&35 )/(:5&0),5 -.,(! 5 .".5 ."#-5 /(5 #-5 ().5 1 &&5 %()1(5 -#( 5 ;5 #')( 65 #(5 *, *,.#)(C6585 , ."/- 5 /,365 #.5 (5 " &*5 (-1 ,#(!5 '(35 #)! )!,*"35 (5 1935 (Fig. 1A) and B. minor (Trindade, 1956) -3-. '.#-5+/ -.#)(-8 B#!85gC65/.5." 5 #,-.5 )--#&5, ),5) 5." 5 '#&35 Keywords: #)! )!,*"365/&')(.65#)5 is a probable acherontis from the Upper de Janeiro of Montana, USA (Roth & Hartman,

 goonC85 0 (5 # 5 ,-#& (( 5 #-5 ().5 ." 5 '#&3]-5 fluminensis (Brito, 1967) (Fig. 1M), a record inside #,-.5, ),65#.5#-5(5#(. , -.#(!5, ),5)(5#.-5)1(5 the distribution of living representatives of the ),5 .),ù5-#(5#-5 ,5 ,)'5." 5 '#&3]-5,  (.5 '#&385&(),# 5"-5(5 2. (-#0 5 )--#&5, ),65 distribution, i.e., southernmost North America ." 5)& -.5 #(!5 ,)'5." 5 /,--#5) 53)'#(!65 (islands south of Florida) and the Caribbean USA (Yen & Reeside, 1946); although Meier- Islands. Brook (1984) considers planorbid fossils earlier CHAROPIDAE: Austrodiscus lopesi than Cenozoic as doubtful.  ,, #,5;5) &")65gono51-5),#!#(&&35&--# # 5 STROPHOCHEILIDAE: Eoborus -5())(.# 5/.65-5." 5! (/-51-5.,(- ,, 5 sanctijosephi B /,365goikC5B#!85gC5#-5/,, (.&35 to Charopidae (Fonseca & Thomé, 1993), so is ." 5 )(&35 -.,)*")" #&#5 -* # -5 #(5 .),ù5 this species. This record is the second oldest (another Eoborus 5 -* # -5 1-5 ,  (.&35 )/(:5 %()1(5 ),5." 5 '#&35B." 5)& -.5 #(!5 ,)'5." 5 Salvador & Simone, in preparation) and represents Cretaceous of Argentina; Morton, 1999) and ." 5 '#&3]-5)& -.5, ),5.)! ." ,51#."5Eoborus .),ù]-5&)&#.35#-5-&#!".&35) 5.)5." 5 -.5) 5." 5 charruanus , a species from the Paleocene of '#&3]-5 ,  (.5 #-.,#/.#)(5 B." 5 ' ,#-65 .85 ,/!/350 ,35-#'#&,5to E. sanctijosephi (Martínez Helena Island, southern Africa, the Asian Pacific et al 865goomC85" - 5, ),-5 &&51#."#(5." 5 '#&3]-5 Islands and Oceania). recent distribution.   95 " 5 )(&35 &/-#&##5  95 " 5 )(&35 /,))*.#5 from Itaboraí is m agalhaesi Trindade, %()1(5#(5 .),ù5#-5Brachypodella britoi Ferreira goki5B#!85gC655, ),5.".5#-5-)' 1".5, ')0 5 ;5 ) &")65 gomg5 B#!85 gC65 ")1 0 ,5 ." 5 )& -.5 ,)'5." 5*, - (.5#-.,#/.#)(5) 5." 5 '#&35B." 5 , ),-5 ) 5 ." 5 '#&35 )' 5 ,)'5 ." 5 ** ,5 South American species are restricted to the Cretaceous of Canada and Mexico (Tozer, 1956; (),."1 -. ,(5*,.5) 5." 5)(.#( (.C85" 5 '#&35 Perrilliat et al ., 2000). Still, B. britoi is a record far #-5%()1(5-#( 5." 5, . )/-5) 5/,)* 5B)& '65 135 ,)'5.".5) 5,  (.5/,))*.#-5B-)/." ,(')-.5 1976), but this is the oldest record for South North America, Central America, the Caribbean America. Islands, and northernmost South America). ELLOBIIDAE: Carychium sommeri VERTIGINIDAE: Vertigo mezzalirai  ,, #,5 ;5 ) &")65 gomg5 B#!85 gC5 #-5 ." 5 )(&35 Ferreira & Coelho, 1971 (Fig. 1P). Vertiginidae &&)##5 #(5 .),ù5 (5 #.]-5 )/.-# 5 ." 5 '#&3]-5 "-5 5 1),&1# 5 #-.,#/.#)(5 (5 ,  (.5 -* # -5 recent distribution, since there are no extant )/,5 #(5 ,4#&85" 5 '#&35 #-5 %()1(5 -#( 5 ." 5 &&)##5#(5,4#&85" 5 '#&35#-5%()1(5-#( 5." 5 Cretaceous of Japan (Isaji, 1976), but this is the of USA and Europe (Yen & Reeside, oldest record for South America. 1946; Solem, 1976).   95 "#-5 '#&35 -")1-5 CONCLUSION 5 2. (-#0 5 , ),5 #(5 .),ù65 1#."5 &')-.5 "& 5 The oldest fossil records of the families of the basin’s fauna: Bulimulus fazendicus 5 /,365 1935 (Fig. 1E), B. fe rreirai Palma & Brito, 1974 Orthalicidae and Strophocheilidae comes from (Fig. 1F), B. sommeri Palma & Brito, 1974 (Fig. the limestones of Itaboraí Basin. Cerionidae, 1G), Itaborahia carvalhoi (Brito, 1967) (Fig. 1H), Clausiliidae, Ellobiidae, Urocoptidae do not have I. coelhoi (Palma & Brito, 1974) (Fig. 1I), I. lamegoi living representatives reaching so far south in I. trinda deae (Ferreira & South America as Rio de Janeiro. Moreover the /,365goik5B#!85g C65 records of Charopidae, Clausiliidae, Cerionidae, ) &")65gomgC5B#!85g C85#.#)(&&3655*)--#& 5 Urocoptidae and Vertiginidae are among the Cyclodontina 5 1-5 )/(5 ,  (.&35 B&0),5 ;5 Simone, in preparation). The records are the )& -.5 %()1(5 #(5 ." 5 1),&85 )(-# ,#(!5 -/"5 5 vast and diverse record of pulmonates in Itaboraí, )& -.5%()1(5 ),5." 5 '#&35(5 &&51 &&51#."#(5 its current distribution. #.5#-5-.,(! 5.".5."#-5 /(5#-5().51 &&5%()1(5(5   95 " , 5 , 5 .1)5 #.5#-5 0 (5#!(), 5#(5-)' 51),%-5 &#(!51#."5." 5 planorbids in Itaboraí Biomphalaria itaboraiensis )--#&5, ),5) 5." 50 ,35 '#&# -5*, - (.5#(5 .),ù85 (Mezzalira, 1946) (Fig. 1L) and Vorticifex " 5-#(]-5 )--#&5, ),5#-5,#"5 ()/!"5.)5(-1 ,5

 '(35+/ -.#)(-5) 5')&&/-(5*& )#)! )!,*"35 MORTON, L.S. 1999. El genero Radiodiscus (5-3-. '.#-8 (-Endodontoidea) en el Cretacico temprano, provincia de Santa REFERENCES Cruz Argentina. Revista da Universidade de Guarulhos (Geociencias) IV(6): 46-49. BERGQVIST, L.P.; MOREIRA, A.L. & PINTO, D.R. 2006. Bacia de São José de PERRILLIAT, M.C.; VEGA, F.J. & , Itaboraí: 75 Anos de História e Ciência. 85 hfff85 ,&35 -.,#".#(5 )&&/-5 Serviço Geológico do Brasil, CPRM, Rio de from the Mexcala Formation of the state Janeiro. 84 p. of Guerrerro, Southern Mexico. Journal of & )(.)&)!35mj95m@hj85 FONSECA, A.L.M & THOMÉ, J.W. 1993. ROTH, B. & HARTMAN, J.H. 1998. A  -,#éã)5  5 &,)!3,5 -/! (85 (865 probable Cerion (Gastropoda: Pulmonata) , ,. ,#4éã)5  5 /-.,)#-/-5 .1)' 3#5 (Parodiz, 1954) e reclassi

 65 85 hfgf85  ,, -.,#&5 (5 , -"1. ,5 SIMONE, L.R.L. & MEZZALIRA, S. 1994. /&')(. 5 -.,)*)-5 ,)'5 ." 5 ,&35 Fossil Molluscs of Brazil. Boletim do , . )/-5 /1$#'5 ),'.#)(65  .),#5 Instituto Geológico 11: 1–202. Group, Japan. Paleontological Research 14(4): 233–243. SOLEM, A. 1976. Biogeographic signi

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