Itaborahia lamegoi Maury, 1935

Salvador, Rodrigo Brincalepe & Simone, Luiz Ricardo Lopes De, 2013, Taxonomic Revision Of The Fossil Pulmonate Mollusks Of Itaboraí Basin (Paleocene), Brazil, Papéis Avulsos de Zoologia 53 (2), pp. 5-46 : 5-46

publication ID

https://doi.org/ 10.1590/S0031-10492013000200001

publication LSID

lsid:zoobank.org:pub:FB337891-1903-4AD7-9D57-FF1965665046

persistent identifier

https://treatment.plazi.org/id/0389CD35-FFFE-2909-FCE4-A912FB2EA1AF

treatment provided by

Felipe

scientific name

Itaborahia lamegoi Maury, 1935
status

 

Itaborahia lamegoi Maury, 1935 View in CoL

( Figs. 43-50 View FIGURES 43-50 )

Itaborahia lamegoi Maury, 1935: 10 View in CoL (figs. 6, 7); Oliveira, 1936: 5; Paula Couto, 1949: 11; Trindade, 1956: 13 (pl. 2, figs. 1b, 2b); Magalhães & Mezzalira, 1953: 220 (pl. 64, fig. 258); Parodiz, 1969: 183 (pl. 19, fig. 13); Breure, 1979: 137; Bergqvist et al., 2006: 58 (fig. 68).

Itaborahya lamegoi (error): Mezzalira, 1946: 18.

Bulimulus View in CoL ? (Itaborahia) lamegoi : Zilch in Wenz, 1959-60: 485, (fig. 1706).

Bulimulus lamegoi View in CoL : Brito, 1967: 17 (pl. 2, fig. 3); Palma & Brito, 1974: 394 (pl. 1, fig. 1); Simone & Mezzalira, 1994: 51 (pl. 15, fig. 422); Rodrigues & Fonseca, 2007: 253.

Bulimulus sommeri Palma & Brito, 1974: 396 (pl. 2, fig. 3, 5); Breure, 1979: 137; Simone & Mezzalira, 1994: 50 (pl. 15, fig. 423); Bergqvist et al., 2006: 57 (fig. 65).

Holotype: AMNH 24240 About AMNH (examined; Figs. 48-49 View FIGURES 43-50 ).

Type Locality: Limestones of Parque Paleontológico de São José de Itaboraí, Rio de Janeiro, Brazil. Park’s center coordinates: 22°50’20”S, 42°52’30”W GoogleMaps .

Geographic and stratigraphic occurrence: Known only from the type locality: Sequences S1 and S2 ( Medeiros & Bergqvist, 1999; Bergqvist et al., 2006).

Age : Tertiary, Middle Paleocene.

Etymology: Species dedicated to its collector, Dr. Alberto R. Lamego (Serviço Geológico e Mineralógico do Brasil).

Diagnosis: Shell fusiform. Spire apex sharply acuminated, with somewhat concave outline. Aperture prosocline. Peristome reflected, incomplete (absent in parietal region). Columellar fold in the uppermost part of the columellar region (next to parietal region). Umbilicus imperforated.

Re-Description: Shell large, fusiform. Greatest width on body whorl; width ~½ shell length. Spire angle ~50°. Profile of whorls slightly convex. Spire apex sharply acuminated, with somewhat concave outline. Suture well-marked, linear, slightly oblique (diagonal) to columellar axis. Protoconch apparently smooth; transition to teleoconch unclear. Shell smooth, except for growth lines. Aperture large, sub-oval, prosocline; ~½ shell length. Peristome reflected, incomplete (absent in parietal region). Columellar fold in uppermost part of columellar region (next to parietal region), extending itself towards shell interior. Body whorl ~⅔ shell length. Umbilicus imperforated.

Measures (in mm): Holotype: 6 or 7 whorls (shell apex broken); H = 31.4; D = 15.1; S = 16.7; h = 15.9; d = 9.9. Mean (n = 7): 7 whorls; H = 30.6 ± 4.5 (max 34.6; min 25.7); D = 13.3 ± 1.8 (max 16.5;

min 11.8); S = 16.0 ± 2.3 (max 18.6; min 13.6); h = 14.1 ± 2.5 (max 16.5; min 11.6); d = 9.1 ± 1.4 (max 10.7; min 7.1).

Examined material: Holotype. DGM 3001 View Materials -I (10 specimens), 4223-I (2 specimens), 5001-I (3 specimens); MNRJ 3350 View Materials -I (1 specimen), 4341-I (1 specimen); MZSP 94822 View Materials (1 specimen), 98180 (1 specimen). Type material of Bulimulus sommeri : DGM 5411 View Materials -I (holotype).

Discussion: Among all the species previously classified as Itaborahia , only the type species, I. lamegoi , is here maintained in the genus. All the other species show different shell shapes and lack a concave outline, a prosocline aperture and a columellar fold. The other species previously classified in Itaborahia by Bergqvist et al. (2006) are here classified as Bulimulus trindadeae , Cyclodontina coelhoi and Cortana carvalhoi .

The holotype of Bulimulus sommeri Palma & Brito, 1974 ( DGM 5411-I; Figs. 50 View FIGURES 43-50 ) is considered here as indistinguishable from Itaborahia lamegoi and, therefore, these species are synonyms. The paratype of B. sommeri ( MNRJ 5188-I) is a new species of the genus Eoborus Klappenbach & Olazarri, 1970 , and is described further in this work as E. fusiforme sp. nov.

DGM

Divisao de Geologia c Mineralogia

MNRJ

Museu Nacional/Universidade Federal de Rio de Janeiro

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Bulimulidae

Genus

Itaborahia

Loc

Itaborahia lamegoi Maury, 1935

Salvador, Rodrigo Brincalepe & Simone, Luiz Ricardo Lopes De 2013
2013
Loc

Bulimulus sommeri

BERGQVIST, L. P. & MOREIRA, A. L. & PINTO, D. R. 2006: 57
SIMONE, L. R. L. & MEZZALIRA, S. 1994: 50
BREURE, A. S. H. 1979: 137
PALMA, J. M. C. & BRITO, I. M. 1974: 396
1974
Loc

Bulimulus lamegoi

RODRIGUES, V. M. C. & FONSECA, V. M. M. 2007: 253
SIMONE, L. R. L. & MEZZALIRA, S. 1994: 51
PALMA, J. M. C. & BRITO, I. M. 1974: 394
BRITO, I. M. 1967: 17
1967
Loc

Itaborahya lamegoi

MEZZALIRA, S. 1946: 18
1946
Loc

Itaborahia lamegoi

BERGQVIST, L. P. & MOREIRA, A. L. & PINTO, D. R. 2006: 58
BREURE, A. S. H. 1979: 137
PARODIZ, J. J. 1969: 183
TRINDADE, N. M. 1956: 13
MAGALHAES, J. & MEZZALIRA, S. 1953: 220
PAULA COUTO, C. 1949: 11
OLIVEIRA, E. 1936: 5
MAURY, C. J. 1935: 10
1935
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