Richmondaropa, Shea & Colgan & Stanisic, 2012

Shea, M., Colgan, D. J. & Stanisic, J., 2012, 3585, Zootaxa 3585, pp. 1-109 : 82

publication ID

7D623F7D-2573-452C-B713-47B30419C5BB

publication LSID

lsid:zoobank.org:pub:7D623F7D-2573-452C-B713-47B30419C5BB

DOI

https://doi.org/10.5281/zenodo.5259125

persistent identifier

https://treatment.plazi.org/id/2D19B12B-9E5A-6619-0FBF-FE4E4784AE3C

treatment provided by

Felipe

scientific name

Richmondaropa
status

gen. nov.

Richmondaropa View in CoL n. gen.

Gyrocochlea Hedley, 1924: 215 View in CoL (in part); Iredale 1937: 322 (in part); Iredale 1941a: 267 (in part); Smith 1992: 190 (in part); Stanisic et al. 2010: 196 (in part).

Roblinella Iredale, 1941b: 1 View in CoL (in part); Smith 1992: 203 (in part).

Type species. Gyrocochlea prava Hedley, 1924 View in CoL —here designated.

Etymology. For the Richmond River district, north-eastern NSW.

Diagnosis. Shell very small, cinnamon brown, planispiral to slightly biconcave with spire flat to slightly concave. Whorls tightly coiled, the last inflated and descending strongly in front. Protoconch sculpture primarily spiral consisting of 17 to 21 prominent, widely spaced, narrow, continuous spiral cords; vague, very weak, underlying radial ridges present. Teleoconch sculpture of numerous, prominent, widely and uniformly spaced, slightly sinuate, orthocline to strongly prosocline radial ribs; microsculpture cancellate with prominent microradial ribs and low microspiral cords. Aperture shape broadly ovately-lunate. Umbilicus wide, U-shaped to cup-shaped. Epiphallus longer than penis, entering penis through a simple pore (i.e. verge absent). Penis tubular with an expanded apical portion, internally with 2–3 longitudinal pilasters.

Distribution and habitat. Sub-coastal volcanics, alluvial flood plains and coastal habitats between the Richmond and Tweed Rivers, north-eastern NSW; found in rainforests, living on undersides of logs.

Remarks. Richmondaropa n. gen. is distinguished by having a predominantly spiral protoconch with widely spaced, continuous narrow, spiral cords. Gyrocochlea Hedley, 1924 differs chiefly in having finely cancellate protoconch sculpture with numerous, extremely crowded, beaded spiral cords; Dictyoropa has a reticulate protoconch sculpture with continuous, widely spaced spiral cords; and Macphersonea n. gen. has distinctly latticelike protoconch sculpture and channelled sutures. Richmondaropa appears confined to the coastal and sub-coastal areas of north-eastern NSW area between the Richmond and Tweed Rivers. However, the hinterland, particularly rainforests of the upper Richmond and Nightcap Ranges needs to be further explored to circumscribe fully the geographic range of the genus and constitute species.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Stylommatophora

Family

Charopidae

Loc

Richmondaropa

Shea, M., Colgan, D. J. & Stanisic, J. 2012
2012
Loc

Roblinella

Smith, B. J. 1992: 203
Iredale, T. 1941: 1
1941
Loc

Gyrocochlea

Stanisic, J. & Shea, M. & Potter, D. & Griffiths, O. 2010: 196
Smith, B. J. 1992: 190
Iredale, T. 1941: 267
Iredale, T. 1937: 322
Hedley, C. 1924: 215
1924
Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF