Corona incisa ( Hupe , 1857)

Breure, Abraham S. H. & Avila, Valentin Mogollon, 2016, Synopsis of Central Andean Orthalicoid land snails (Gastropoda, Stylommatophora), excluding Bulimulidae, ZooKeys 588, pp. 1-199 : 43-44

Taxon classification Animalia Stylommatophora Orthalicidae

Corona incisa ( Hupe, 1857) Figs 40 C–D, 42 D–E, 43, 84 A–B, 89B

Bulimus incisus Hupé 1857: 36, pl. 9 fig. 1.

Corona incisa var. machadoensis Strebel 1909: 131, pl. 27 figs 412-413.

Corona incisa ; Richardson 1993: 67 (references, synonymy); Simone 2006: 159, fig. 543.

Corona machadoensis Simone 2006: 159, fig. 545.

Type locality.

“Bolivie”; see remarks.

Type material.

MNHN 28242, lectotype (design.n.); MNHN 28068 (4), paralectotypes.

Diagnosis.

Shell sinistral or dextral, conic-ovate, solid, changing in ground colour from creamy (top) to tawny (last whorl) with a narrow girdle at the periphery of yellowish, arrow-like markings (>>) and darker sections in between, numerous narrow axial streaks, overlying few broader ones in the basic pattern.

Dimensions.

"Alt., 62; diam., 33 mill."; figured specimen herein shell height 73.8, diameter 33.4 mm.

Distribution.

Peru, Dept. Madre de Dios, Reserva Los Amigos, Boca Amigo (FML 14940); Bolivia, Dept. Beni, Covendo (USNM 361134*, 362864*); ibid., Reyes, Hacienda Shatarona (ANSP 165233*); Dept. La Paz, Chiñiri (ANSP 165232*); ibid., Santa Ana (ANSP 165234*); Dept. Santa Cruz, Amboró (FML 1121). Brasil ( Simone 2006).

Ecoregion.

Bolivian Yungas [NT0105], Southwest Amazon moist forests [NT0166], Dry Chaco [NT0210], Beni savanna [NT0702].

Remarks.

Hupé did not state on how many specimens his description was based; he referred to d’Orbigny 1837 [1834-1847]: pl. 29 figs 4-5. The specimens corresponding to this plate, however, do not match the dimensions given by Hupé. It may be that Hupé made an error when stating the shell height as "Alt., 62", or that he had both d’Orbigny’s and his own specimens at his disposal during the description; the latter, if present, have not been found. The specimen matching d’Orbigny’s (1837 [1834-1847]: pl. 29) figure 4 has been located in the MNHN collection; it corresponds to the figure of Hupé (1857: pl. 9 fig. 1), and is now designated lectotype (design.n.). According to d’Orbigny 1837 [1834-1847]: 258 his material was found "entre cette province [Chiquitos] et celle de Moxos [i.e., northern part of Dept. Cochabamba and southern part of Dept. Beni], dans les forêts inondées une partie de l’année, et qu’habitent les sauvages Guarayos, à la saison des pluies, elle est assez commune". The variety described by Strebel (1909) was based on material from the Dohrn collection and labelled 'Rio Machado’. This is both the name for a river in Edo. Minas Gerais and the local name for Río Ji-Paraná in Edo. Rondônia in Brazil. The provenance of Dohrn’s material is unknown and the specimens have not been located. The type material of both Bulimus incisus Hupé, 1857 and Corona incisa var. machadoensis Strebel, 1909 is sinistral; however, this is an eniantomorphous species as shown by Simone (2006: fig. 543). The record from Peru is tentatively identified as this species.