Silicula tumidula, Monterosato, 1880

Appolloni, Massimo, Smriglio, Carlo, Amati, Bruno, Lugliè, Lorenzo, Nofroni, Italo, Tringali, Lionello P., Mariottini, Paolo & Oliverio, Marco, 2018, Catalogue of the primary types of marine molluscan taxa described by Tommaso Allery Di Maria, Marquis of Monterosato, deposited in the Museo Civico di Zoologia, Roma, Zootaxa 4477 (1), pp. 1-138 : 75-76

tumidula , Silicula [ Microgloma pusilla (Jeffreys, 1879) ] ( Figures 34C, D )

1875b: 11 [XIII: 237]—as Phaseolus tumidulus —nomen nudum

1875c: 9 [XIV: 285]—as Phaseolus tumidulus —nomen nudum

1878c: 67—[XIX: 381]—as Phaseolus tumidulus —nomen nudum

1880c: 56 [XXVII: 540]—available name

Type material. MCZR–M–14434/L —1 sh (Lectotype) “ Phaseolus tumidulus ,...xxxxx.. [unreadable] Monteros. Palermo 90—210 m. inedito” designated by Gaglini (1991).

MCZR –M–14434/P —2 sh + 2 v (Paralectotypes) // 1sh + 2 v Label on the bottom: “ Phaseolus tumidulus ,...xxxxx.. [unreadable] Monteros. Palermo 90— 210 m. inedito”

Type locality. Palermo (Sicily) Described also from Sciacca (Sicily).

Remarks. The species was reviewed by Ockelman & Warén (1998), who reported a number of syntypes in the MCZR that does not match the total we found, and reported the presence of another possible syntype in SMNH. They assigned the species to Microgloma Sanders & Allen, 1973 (type sp. Microgloma yongei Sanders & Allen, 1973 , by original designation) and that genus to the family Nuculanidae H. Adams & A. Adams , 1 858. Recorded by MolluscaBase (2018) as Microgloma tumidula (Monterosato, 1880) in the family Yoldiidae Dall, 1908 . However, two similar species have been repeatedly mixed under this name. The types of S. tumidula in MCZR seem to be the species that Salas (1996: figs 58–61) and probably Ockelmann & Warén (1998: fig. 8A) assigned to Microgloma pusilla (Jeffreys, 1879) , which is the commonest one: this makes M. tumidula (Monterosato) a synonym of M. pusilla (Jeffreys) [new synonymy]. The second species ( Salas, 1996: figs 62–64; Ockelmann & Warén, 1998: figs 8C, D) (more trapezoidal) is Microgloma turnerae Sanders & Allen, 1973 , valid name for this species [new status], which has been wrongly synonymized with S. tumidula .

Figures

FIGURE 34. A, B. Leda producta Monterosato, 1880, Palermo (Sicily), 2.4 mm x 4.0 mm, with original label (MCZR–M– 14425); C, D. Silicula tumidula Monterosato, 1880, lectotype, Palermo (Sicily), 0.7 m x 0.9 mm, with original label (MCZR– M–14434); E, F. Nucula apicina Monterosato, 1891, fossil of Santa Flavia (Sicily), 2.7 mm x 2.0 mm, with original label (MCZR–M–30040); G, H. Nucula perminima Monterosato, 1875, Sciacca (Sicily), H. 0.9 mm x 1.5 mm, with original label (MCZR–M–14376); I, J. Arca corbuloides Monterosato, 1880, Civitavecchia (Italy), 75 mm x 53.1 mm with original label (MCZR–M–14178); K, L. Crenella arenaria Monterosato, 1875, Sciacca (Sicily), 2.1 mm x 1.6 mm, with original label (MCZR–M–14017); M, N. Mytilus herculeus Monterosato, 1884, Sciacca (Sicily), 164 mm x 84.5 mm, with original labels (MCZR–M–9788); O, P. Mytilus hyalinus Monterosato, 1875, Palermo (Sicily), 1.9 mm x 1.3 mm, with original label (MCZR– M–13973).