Scaphopoda (Mollusca) from the Brazilian continental shelf and upper slope (13 º to 21 ºS) with descriptions of two new species of the genus Cadulus Philippi, 1844 Author Caetano, Carlos Henrique Soares Author Scarabino, Victor Author Absalão, Ricardo Silva text Zootaxa 2006 1267 1 47 journal article 10.5281/zenodo.173183 e66afec9-257b-473d-978b-1940bac0537b 1175­5326 173183 Graptacme perlonga (Dall, 1881) Figs. 44–45 + Dentalium perlongum Dall 1881: 36 ; 1889: 76, pl. 27, fig. 6. + Dentalium (Laevidentalium) perlongum : Pilsbry and Sharp 1897: 104 , pl. 18, figs. 10, 11; Henderson 1920: 75, pl. 9, fig. 1; Maury 1922: 38; Lange de Morretes 1949: 54; Turner 1955: 313; Rios 1970: 144. + Graptacme perlongum : Scarabino 1985: 199 , pl. 72, fig. 1018; 1994: 307, pl. 105, fig. 1506. + Graptacme perlonga : Steiner & Kabat 2001: 446 ; 2004: 629. Type material Lectotype MCZ 7752 (designated by Turner, 1955: 319 as " Holotype "); Paralectotypes MCZ 7660, 1 dd, MCZ 7661, 1 dd, MCZ 7663, 1 dd, MCZ 7664, 3 dd.

Type locality
North of Yucatan Bank, Blake	sta	33,	24º01’N,	88º58’W,	2868	m	(subsequent
designation by Turner, 1955: 319).

Diagnosis Shell long (to 90 mm ), slender, solid, almost straight. Surface smooth but apical portion shows longitudinal striae. Apex with a U­shaped notch on ventral side. Material examined Lectotype and Paralectotype MCZ 7660 of Graptacme perlonga ; IBUFRJ 13866, sta 517, 1 dd; IBUFRJ 14309, off Bacia de Campos, Rio de Janeiro, 1000–1600 m , 3 lv, 20 dd. Distribution USA : North Carolina to Florida; gulf of Mexico ; Grenada (Henderson 1920); Brazil : Ceará (Henderson 1920), Bahia and Rio de Janeiro (this study). Living 1000–1600 m (this study), empty shells 200 to 4850 m (Steiner & Kabat 2004). Remarks Turner (1955: 319) recognized the specimen from MCZ 7752 as the only one that agrees with the original description and illustration of Graptacme perlonga , wrongly using the term holotype to designate this specimen since Dall (1881) did not designate a holotype . Steiner & Kabat (2004) considered Turner’s " holotype " as the lectotype . Turner’s use of the term " holotype " falls within the conditions of ICZN Art. 74.5 to accept a " holotype " indication as a lectotype designation, because Turner (1955) knewn that Dall (1881) did not select any specimen as holotype . Turner’s lectotype designation is valid. Henderson (1920) cited specimens from Rio de Janeiro and off Rio de la Plata, Uruguay , the latter also indicated by Scarabino (1973). Penna­Neme (1974) recorded this species from the coast of Maranhão, at Ilha Grande­Rio de Janeiro and south of Brazil . Cabral and Mello (1994: 38, fig. 9) reported it for the states of Ceará and Alagoas. We do not consider those records to belong to G. perlonga , because all were based on specimens gathered in depths ranging from the shore to 170 m , while this species has a bathyalabyssal distribution being collected from depths greater than 200 m (Steiner & Kabat 2004). Additionally, we examined the material from Scarabino (1973) and Penna­Neme (1974) studies, which prooved to be misidentified specimens. Recently, Scarabino (2003) stated that G. perlonga records from off Argentina were obviously due to a mistake in the station number, as suspected previously by Henderson (1920), who added a question mark to this record. Thus, we conclude that the southernmost geographical distribution limit for this species is off Rio de Janeiro, Brazil .