Isotriphora sp. 1, Cotton & Godfrey, 1931

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 : 18-19

Isotriphora sp. 1

Figs 6 , 23I , 52

Material examined

BRAZIL – Fernando de Noronha Archipelago • 2 specs; Cabeço da Sapata ; depth 40 m; 5 Dec. 1985; M. Cabeda leg.; MORG 52611 * • 2 specs; Cabeço da Sapata ; 03º52′41″ S, 32º29′04″ W; depth 45 m; 6 Sep. 2013; in rhodolit beds; ZUEC-GAS 7353 • 1 spec.; Cabeço da Sapata ; 03º52′41″ S, 32º29′04″ W; depth 45 m; 6 Sep. 2013; in rhodolit beds; ZUEC-GAS 7489 .

Remarks

The incomplete shells of Isotriphora sp. 1 are easily differentiated from those of the sympatric I. uncia sp. nov. by the presence of brown axial patches ( Fig. 6 A–B, E–F) and an earlier emergence of the median spiral cord, rapidly enlarging and reaching the same size of other cords ( Fig. 6C ). The most similar species to Isotriphora sp. 1 is “ Inella ” maculata Fernandes & Pimenta, 2019, from southeastern Brazil, which has a different protoconch. Complete shells of Isotriphora sp. 1 are required to formally describe this species.

Geographical distribution

Brazil: Fernando de Noronha.

Bathymetric distribution

Depth: 40– 45 m.

Figures

Fig. 6. Isotriphora sp. 1. A–B. MORG 52611*, 2.08 mm and 1.58 mm, respectively. C–D. Same shell as A. E–F. ZUEC-GAS 7489, 1.44 mm. G. ZUEC-GAS 7489, same shell as E. Scale bars: A–C, E–F = 1 mm; D, G = 100 µm. Photo credits E–G: Aramys Cesar (UNICAMP).

Fig. 23. Triphoridae from Brazil (2). A. “Inella” sp. 4. B. Iniforis carmelae Rolán & Fernández- Garcés, 1993. C. Iniforis pseudothomae Rolán & Fernández-Garcés, 1993. D. Isotriphora leo sp. nov. E. Isotriphora onca Fernandes, Pimenta & Leal, 2013. F. Isotriphora tigrina Fernandes, Pimenta & Leal, 2013. G. Isotriphora tricingulata Rolán & Fernández-Garcés, 2015. H. Isotriphora uncia sp. nov. I. Isotriphora sp. 1. J. Latitriphora albida (A. Adams, 1854). K. Marshallora sp. L. Marshallora ostenta Rolán & Fernández-Garcés, 2008. M. Marshallora sp. 1. N. Monophorus caracca (Dall, 1927) comb. nov. O. Monophorus olivaceus (Dall, 1889). P. Monophorus verecundus sp. nov. Q. Nanaphora leei Fernandes & Pimenta, 2015. R. Nanaphora verbernei (Moolenbeek & Faber, 1989). S. Nanaphora sp. 1. Scale bars: 1 mm.

Fig. 52. Distribution map of Isotriphora sp. 1 (gray circle) and Isotriphora leo sp. nov. (red circle).