Dutoitella suhmi Brady 1880

Dutoitella suhmi Brady, 1880

(Figure 15.A–B, Table 1)

1880 in part Cythere suhmi Brady: 106–107. pl. 26,?figs. 3.a–h.

1887? Cythere suhmii Id., Brady: 165.

1963?in part Cythere suhmi; Bate: 81, tab. 1.

1976 in part Cythere suhmi; Puri & Hulings: 290–291, pl. 17.7–12, fig. 10. 1979 non Cythere suhmi; Ducasse & Peypouquet: 2.5–2.6.

1987? “ Suhmicythere ” suhmi (Brady); Whatley & Coles: 96, pl. 6.18– 6.21. 1988? “ Suhmicythere ” suhmi (Brady, 1880); Whatley & Ayress (no illustration) 1989 non Dutoitella suhmi (Brady); Dingle et al. (no illustration)

1990 non Dutoitella suhmi (Brady 1880); Dingle & Lord: fig. 2.10

1990 non Dutoitella suhmi (Brady); Dingle et al.: 290, fig. 27e–f, tab. 1 1990? Dutoitella suhmi (Brady); Coles et al. (no illustration)

1991? Dutoitella suhmi (Brady 1880); Whatley & Coles:?fig. 4,? Appendix 2. 1997? Dutoitella suhmi (Brady 1880); Ay ress et al. (no illustration) 1999? Dutoitella suhmi (Brady 1880); Whatley & Roberts (no illustration) 2003 Dutoitella suhmi (Brady); Dingle: 149, pl. 5.1 (lectotype)

2004? Dutoitella suhmi (Brady); Ayress et al.: tab. 3 (no illustration) 2005 Dutoitella suhmi (Brady 1880); Mazzini: 73–74, fig. 41.

2009 non Dutoitella suhmi (Brady 1880); Alvarez Zarikian et al.: pl. P5.6–5.7; Alvarez Zarikian: pl. 5.6–5.7 2010 non Dutoitella suhmi (Brady 1880); Bergue & Govindan: 752, fig. 3.20 2015 non Dutoitella suhmi (Brady 1880); Alvarez Zarikian: pl. 8.7–8.8.

Material. Lectotype NHM 80.38.119.A (SNB added the “A” after the collection number): One Subrecent, coated LV on a white, paper micropalaeontological slide labelled “173, Cythere suhmi Brady, H. S. Puri 7/6 7, Lectoholotype, T, 116, “Challenger”, D. 2300, # 241 (in pencil), 80.38.119.A” – This specimen was illustrated by Mazzini (2005, p. 73–74, fig. 41).

Stratigraphic and geographical occurrence. (locality 6 in Fig. 2 and Tab. 1). Subrecent, Northwestern Pacific, 4206m depth (only known from the type locality).

Type locality. (Brady, 1880: 25) Subrecent. Northwestern Pacific. Challenger Expedition 1873–1876, station 241, 35°41'N, 157°42'E, tow net, 23.06.1875, 2300 fathoms (4206m).

Measurements. LECTOTYPE (NHM 80.38.119.A), Subrecent LV length 1.27mm; height 0.75mm.

Remarks. Although Puri & Hulings (1976, p. 290) and Mazzini (2005, p. 73) record the lectotype with 2 valves (1 left and 1 right), one of us (SNB) could only find one coated left valve in the slide labelled with “ Lectotype NHM 80.38.119.A” (SNB added the “A” after the collection number).

The left valve recorded by Puri & Hulings (1976) as ‘topotypic’ material (‘BM 1974.289’) come from the Southern Ocean (Challenger station ‘off Prince Edward Island, 50 to 150 fath.”) instead of the Northwestern Pacific (as the lectotype). This left valve is probably lost, since the slide present in the Challenger collection and labelled with the number 1974.289 is empty (see below). Our measurements are considerably different than the ones published previously, i.e. length LV 1.15; height 0.68mm (Puri & Hulings, 1976).

Further paralectotypes of Dutoitella suhmi (i.e., specimens studied and identifed by Brady in 1880 as Cythere suhmi) are herein identified as Dutoitella sp. (see Fig 15.C–E). Finally, the specimens sorted in the 70’s from the Challenger sediment sample M-169 by Puri and identified as Cythere suhmi do not belong to Dutoitella, but to another cytheroidean genus (see Fig 15.F and section Cytheroidea sp. below).