Solaropsis caperata, Silva & Mendes-Júnior & Simone, 2022

Silva, Fernanda S., Mendes-Júnior, Raimundo N. G. & Simone, Luiz Ricardo L., 2022, A new species of Solaropsisfrom Amapá, Brazil (gastropoda: Solaropsidae) triggering uncertainty about the genus and redefinition of some species, Journal of Natural History 56 (1 - 4), pp. 79-89 : 83-85

Solaropsis caperata sp. nov.

( Figures 2–16 )

Type material. Holotype MZSP 144000 (Mendes Jr, R, col., 8 October 2015) . Paratypes: BRAZIL. Amapa; Laranjal do Jari, Comunidade de Marinho, 1.61972222°S, 53.47027778°W, MZSP 154136 ( Figs. 10-12 ), 1 shell [N. Vicente col, 12 December 2020, Sta. C 416]; near Grota do Cemitério , RESEX do Rio Cajari , 1°40 ʹ 24”N, 53°27 ʹ 43”W, MZSP 154137 ( Figs. 13- 16 ), 1 immature specimen [N. Vicente col, 1 December 2020, Sta. C 417] .

Type locality. Brazil. Amapá; municipality of Laranjal do Jari, Rio Cajarí Extractive Reserve , BR highway – 156, 0.82093611°S, 52.03254722°W .

Material examined. Types.

Etymology. The name refers to the strongly wrinkled depression half a whorl preceding the peristome, from the Latin caperata (a feminine adjective), meaning wrinkle.

Diagnosis. Shell large, with strong wrinkled depression half a whorl preceding the peristome, causing folds inferiorly. Spire dome-shaped, suture shallow. Peristome ample. Umbilicus widely opened.

Description. Shell globose-discoid, ~ 50 mm in maximum diameter, ~5¼ whorls; outline rounded; suture shallow, practically plane ( Figures 4–5 , 10 and 13–14 ). Protoconch of 5 mm, with about two whorls, smooth, uniform beige ( Figures 2, 7 , 11 and 15 ). Teleoconch ~3 whorls; sculpture consisting of growth lines producing narrow undulations, mainly close to superior suture, and rounded granules over whorls (Figures –10). Colour beige, with stains mainly in superior surface, orange colour in first two whorls, gradually darkening to brown until last whorl forming mosaic of coalescent spots usually in opisthocline bands. Inferior surface almost uniformly beige, with scanty dark, narrow, axial spots in periphery ( Figures 3 , 12 and 16 ). Two deep depressions located half a whorl from peristome ( Figures 3, 6 and 12–14 ), larger one elliptical, projected to periphery, ~1/6 whorl in length; smaller depression parallel to larger one, turned inferiorly, spirally elongated ( Figures 3, 6 , 12 and 14 ). Last half whorl with weak peripheral carina, located along its middle region ( Figures 4 and 13 ). Peristome wide, ~70% of shell height, ~52% of shell width ( Figures 5 and 10 ); superior 2/3 strongly convex, callus narrow and thin; inferior 1/3 notched, performing angle ~40°, incompletely covering umbilicus; outer lip performing wide arc, with ample notch (~120°) correspondent to carina. Umbilicus open, occupying ~10% of inferior area ( Figures 3, 6 , 12 and 16 ).

Measurements (width and height in mm). Holotype MZSP 14400 ( Figures 2–9 ): 50.2 by 33.3; paratype MZSP 154136 ( Figures 10–12 ): 45.1 by 28.5; MZSP 154137 ( Figures 13–16 ): 39.5 by 26.4 (specimen not fully grown).

Distribution. Known only from type locality.

Habitat. Within leaf litter and rotting trunks or branches of fallen trees, in the soil and trees.

Figures

Figures 2–7. Holotype of Solaropsis caperata MZSP 144000 (W = 50.2 mm): 2, apical view; 3, inferior view; 4, left view; 5, apertural view; 6, detail of region half a whorl preceding the peristome, showing characteristic depression, dorsal-slightly inferior view; 7, detail of apical region, apical view, scale = 1 mm.

Figures 8, 9. Holotype, details of punctuation in the sculpture, scales = 1 mm.

Figures 10–16. Paratypes of Solaropsis caperata. 10, MZSP 154136 (W 45.1 mm), frontal view; 11, same apical view; 12, same, inferior view; 13, MZSP 154137 (W 39.0 mm), frontal view; 14, same, frontalslightly inferior view to show depression; 15, same, apical view; 16, inferior view.