Lilloiconcha laevigata, Hausdorf, 2005
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publication ID |
https://doi.org/ 10.1080/00222930500145057 |
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persistent identifier |
https://treatment.plazi.org/id/03C78783-FF8B-FFE0-FE11-FA50FCAFE1AA |
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treatment provided by |
Felipe |
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scientific name |
Lilloiconcha laevigata |
| status |
sp. nov. |
Lilloiconcha laevigata sp. n.
( Figures 2 View Figures 1–3 , 6, 7 View Figures 4–9 , 16–20 View Figures 13–20 , 21 View Figure 21 )
Diagnosis
Lilloiconcha laevigata differs from Lilloiconcha costulata in the lack of ribs and the on average larger shell with more whorls. It also differs from other Lilloiconcha species in the lack of ribs.
Shell ( Figures 2 View Figures 1–3 , 6, 7 View Figures 4–9 )
Depressed conical-globular; with 4–4.25 convex whorls; protoconch with indistinct microscopical spiral striae; teleoconch with a reticulate pattern consisting of fine growth-striae and dense microscopical spiral threads; brownish corneous with reddish brown transverse stripes; body whorl rounded; aperture almost circular; upper insertion of the peristome not descending towards the aperture; suture impressed; peristome sharp, neither expanded nor thickened; umbilicus wide, taking about 22–30% of the shell diameter.
Measurements
La Calera, 0.5 km towards Bogotá (n 520): D53.223.7 mm, Ø53.5¡ 0.1 mm; H52.122.5 mm, Ø52.3¡ 0.1 mm; D/H51.3821.64, Ø51.50¡0.06.
Anatomy ( Figures 16–20 View Figures 13–20 )
Only the radula of one paratype from La Calera, 0.5 km towards Bogotá ( ZMH 4068 View Materials ) could be examined. The tricuspid central teeth are narrower and shorter than the adjacent lateral teeth. The slender central cusps of the central teeth are more than twice as long as the side cusps. The central cusp of the tricuspid lateral teeth is shifted backwards. It is connected with the large and strongly curved side cusps with a low bridge which begins between the bases of the side cusps with an apparent extra denticle, sometimes with two tips. Towards the periphery the endocone of the lateral teeth increases and approximates the mesocone. At the transition to the marginal teeth extra denticles develop next to the ectocone so that the marginal teeth are multicuspid .
Etymology
The specific epithet refers to the comparatively smooth (Latin laevigatus) shell which characterizes the species.
Type locality
Colombia, Cundinamarca: La Calera, 0.5 km towards Bogota´, farm Las Cabreras, Vereda San Rafael, Andean forest , N slope, 2840 m altitude, 04 ° 429300N, 73 ° 589200W .
Distribution ( Figure 21 View Figure 21 )
Lilloiconcha laevigata is known from Andean forests at 2820–3430 m altitude in the Departamento Cundinamarca in Colombia. Lilloiconcha laevigata and Lilloiconcha costulata occur sympatrically at the type locality of both species near La Calera.
Material
Colombia, Cundinamarca: La Calera, 0.5 km towards Bogota´, farm Las Cabreras , Vereda San Rafael , 2820–2840 m altitude, 04 ° 429300N, 73 ° 589200W (holotype ZMH 4792 View Materials , leg. B. Hausdorf, 11 March 2000, measurements: D 53.6 mm, H 52.5 mm; UNAL; ZMH 4020 View Materials , 4036 View Materials , 4068 View Materials ); Subachoque towards radar station at El Tablazo, chusque forest, S slope, 3430 m altitude, 05 ° 009390N, 74 ° 119380W ( ZMH 4284 View Materials ) .
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