Cheirodonta dupliniana ( Olsson, 1916 )

Fernandes, Maurício Romulo & Pimenta, Alexandre Dias, 2020, Unraveling one of the ‘ Big Five’: update of the taxonomy of Triphoridae (Gastropoda, Triphoroidea) from Brazil, European Journal of Taxonomy 665 (665), pp. 1-170 : 7-9

Cheirodonta dupliniana ( Olsson, 1916)

Figs 1 , 22G , 29 , 83

Triphora dupliniana Olsson, 1916: 138 , pl. 3 fig. 8.

Triphora bolax Olsson & Harbison, 1953: 295 , pl. 43 fig. 4.

Cheirodonta mizifio Fernandes & Pimenta, 2015: 496 , fig. 2.

Triphora dupliniana – Gardner 1948: 205, pl. 27 fig. 3. — Treece 1980: 560. — Miller 1989: 96. Cosmotriphora dupliniana — Rosenberg et al. 2009: 645.

Triphora sp. 1 – Daccarett & Bossio 2011: fig. 423.

Cheirodonta dupliniana – Fernandes & Pimenta 2019a: 12 , figs 5–6.

Triphora perversa nigrocincta non C.B. Adams, 1839 – Perry & Schwengel 1955: 139, pl. 27 fig. 189, partim.

Triphora lilacina non Dall, 1889 – Vokes & Vokes 1983: 18, pl. 27 fig. 13.

Triphora hemphilli non Bartsch, 1907 – Odé 1989: 112. — Tunnell et al. 2010.

Marshallora nigrocincta non C.B. Adams, 1839 – Lee 2009: 89, partim.

Sagenotriphora osclausum non Rolán & Fernández-Garcés, 1995 – Garcia & Lee 2011.

Triphora oreodoxa non Olsson & Harbison, 1953 – Garcia & Lee 2011.

Material examined

Lectotype (herein designated)

UNITED STATES OF AMERICA – North Carolina • Natural Well; Duplin formation, Miocene; figured in Olsson 1916; PRI 1376 .

Paralectotype

UNITED STATES OF AMERICA – Virginia • 1 spec.; James River, north of Smithfield; Yorktown Formation, Miocene; PRI 11016 .

Other material

BRAZIL – Fernando de Noronha Archipelago • 2 specs; Porto; depth 6 m; 20 Jul. 1999; P. Souza and L. Simone leg.; MZSP 32023 . See Fernandes & Pimenta (2015) for other localities.

PANAMA • 4 specs; Colón Island, Bocas del Toro; 1 Mar. 1953; McGinty leg.; FLMNH 160564 .

UNITED STATES OF AMERICA – Connecticut • 9 specs; Branford ; W.H. Winkley leg.; MCZ 34426 . – South Carolina • 1 spec.; 32º29′36″ N, 79º42′30″ W; depth 18 m; 26 Jul. 1981; R/V Bagby leg.; USNM 850620 . – Florida • 4 specs; off Yamato Rocks, Palm Beach ; 26 Apr. 1939; F.B. Lyman leg., FLMNH 507930 • 1 spec.; off Palm Beach ; depth 183 m; T.L. McGuity leg.; MCZ 244439 • 3 specs; Sanibel Island, Tarpon Bay ; W.J. Clench and B. Chandler leg.; MCZ 256788 • 12 specs; 0.8 km E of Sanibel Island; depth 11–27 m; 1933; W.J. Clench and B. Chandler leg.; MCZ 256794 • 1 spec.; 4.8 km SW of Sanibel Lighthouse; depth 44–49 m; 1933; W.J. Clench and B. Chandler leg.; MCZ 356053 • 1 spec.; Sanibel Island ; BMSM 20533 • 1 spec.; Middle Gulf shore, Sanibel Island ; BMSM 33601 • 6 specs; Sanibel Island ; 1935; L. Perry leg.; USNM 617570 • 1 spec.; off Kice Island, Ten Thousand Islands ; BMSM 67455 .

Remarks

Triphora dupliniana Olsson, 1916 and Triphora bolax Olsson & Harbison, 1953 were described as fossils from the Miocene/Pliocene, the former from Virginia and North Carolina, the latter from Florida ( USA). The scarcity of integrative researches comprising fossil and Recent material precluded the use of both names in the literature of extant triphorids. Our analysis of several lots in malacological collections in the USA revealed that many shells originally labeled as Marshallora nigrocincta (C.B. Adams, 1839) or Marshallora sp. actually consist of Cheirodonta dupliniana ( Olsson, 1916) , including references in the literature (e.g., Lee 2009). Cheirodonta bolax ( Olsson & Harbison, 1953) comb. nov. and Cheirodonta mizifio Fernandes & Pimenta, 2015 (described from Brazil) are regarded as junior synonyms of C. dupliniana owing to their identical shell morphology. If enough live material of C. dupliniana is posteriorly obtained, genetic comparisons of specimens from Brazil ( C. mizifio ) and “Caribbean” ( C. dupliniana ) could test the validity of the synonyms herein proposed.

The shell identified by Olsson & Harbison (1953: pl. 43 fig. 2) as T. dupliniana from the Pliocene of Florida ( USA) actually belongs to Marshallora Bouchet, 1985 .

Geographical records

USA: Connecticut (this study), Virginia ( Olsson 1916), North Carolina (type locality of C. dupliniana ), South Carolina to Florida (this study; Florida is the type locality of C. bolax ), Louisiana ( Garcia & Lee 2011; as Sagenotriphora osclausum and Triphora oreodoxa ), Texas ( Odé (1989) and Tunnell et al. (2010) as Triphora hemphilli ); Mexico ( Treece 1980; Vokes & Vokes 1983, as Triphora lilacina ); Panama (this study); Colombia ( Daccarett & Bossio 2011, as Triphora sp. 1); Brazil: Fernando de Noronha Archipelago (this study), Rio Grande do Norte, Bahia to Rio de Janeiro ( Fernandes & Pimenta 2015, as Cheirodonta mizifio ).

Bathymetric distribution

Depth: 6–183 m (this study).

Figures

Fig. 1. Cheirodonta dupliniana (Olsson, 1916). A–C. PRI 1376, 5.75 mm (original description) or 6.31 mm (scale bar provided), lectotype, illustrated in Olsson (1916). D–E. PRI 11016, 5.57 mm, paralectotype, not illustrated in Olsson (1916). F–G. MCZ 34426, 6.75 mm and 6.35 mm, respectively. H. FLMNH 160564, 6.00 mm. I–J. FLMNH 507930, 4.60 mm. Scale bars: B–I = 1 mm; J = 500 µm. Photo credits B–E: Leslie Skibinski (Cornell University).

Fig. 22. Triphoridae from Brazil (1). A. Metaxia excelsa Faber & Moolenbeek, 1991. B–C. Metaxia rugulosa (C.B. Adams, 1850). D. Metaxia taeniolata (Dall, 1889). E. Metaxia gongyloskymnus Fernandes & Pimenta, 2011. F. Metaxia prompta Rolán & Fernández-Garcés, 2008. G. Cheirodonta dupliniana (Olsson, 1916). H. Coriophora novem (Nowell-Usticke, 1969). I. Cosmotriphora arnoldoi Faber & Moolenbeek, 1991. J. Cosmotriphora melanura. K. Eutriphora auffenbergi Rolán & Lee, 2008. L. Eutriphora costai Fernandes & Pimenta, 2015. M. Inella apexbilirata Rolán & Fernández- Garcés, 2008. N. “Inella” differens Rolán & Lee, 2008. O. “Inella” euconfio Fernandes & Pimenta, 2019. P. “Inella” faberi Rolán & Fernández-Garcés, 2008. Q. “Inella” faceta Fernandes & Pimenta, 2019. R. “Inella” galo Fernandes & Pimenta, 2019. S. “Inella” leucocephala Fernandes & Pimenta, 2019. T. “Inella” maculata Fernandes & Pimenta, 2019. U. “Inella” vanilla Fernandes & Pimenta, 2019. V. Inella sp. 1. W. “Inella” sp. 2. X. “Inella” sp. 3. Scale bars: 1 mm.

Fig. 29. Distribution map of Cheirodonta dupliniana (Olsson, 1916); red circle = type locality.

Fig. 83. Southern limits of planctotrophic, wide-range and tropical shallow-water triphorids from Brazil; the single exception is the lecithotrophic (but with a probable planctonic larva) Metaxia rugulosa (C.B. Adams, 1850). Illustrated shells are not necessarily from the southernmost end of their range. Species are cited from the left to the right, beginning with those situated at the top of each section: 1. Iniforis pseudothomae Rolán & Fernández-Garcés, 1993, Latitriphora albida (A. Adams, 1854), Triphora atlantica Smith, 1890, Triphora scylla Fernandes & Pimenta, 2015, Metaxia excelsa Faber & Moolenbeek, 1991, Cheirodonta dupliniana (Olsson, 1916), Coriophora novem (Nowell-Usticke, 1969), Cosmotriphora melanura (C.B. Adams, 1850), Eutriphora costai Fernandes & Pimenta, 2015, Marshallora ostenta Rolán & Fernández-Garcés, 2008. 2. Metaxia taeniolata (Dall, 1889), Monophorus verecundus sp. nov., Triphora elvirae De Jong & Coomans, 1988. 3. Metaxia rugulosa, Monophorus olivaceus (Dall, 1889), Sagenotriphora osclausum (Rolán & Fernández-Garcés, 1995), Strobiligera inaudita (Rolán & Lee, 2008). 4. Cosmotriphora arnoldoi Faber & Moolenbeek, 1991, Nanaphora verbernei (Moolenbeek & Faber, 1989), Nototriphora decorata (C.B. Adams, 1850), Triphora ellyae De Jong & Coomans, 1988, Similiphora intermedia (C.B.Adams, 1850). 5. Triphora charybdis Fernandes & Pimenta, 2015, Marshallora spp. Map adapted from Google Earth.