Innesoconcha rosacea, (IREDALE, 1944)

Hyman, Isabel T., Caiza, Jennifer & Köhler, Frank, 2023, Dissecting an island radiation: systematic revision of endemic land snails on Lord Howe Island (Gastropoda: Stylommatophora: Microcystidae), Zoological Journal of the Linnean Society 197 (1), pp. 20-75 : 69-70

publication ID	https://doi.org/10.1093/zoolinnean/zlac075
publication LSID	lsid:zoobank.org:pub:613C3FA2-CDF7-4BED-B852-340C3DE724F9
DOI	https://doi.org/10.5281/zenodo.7499171
persistent identifier	https://treatment.plazi.org/id/A24B0931-9811-FFD7-FF64-FA74FD5508E9
treatment provided by	Plazi (2022-12-22 07:32:40, last updated 2023-11-08 00:52:32)
scientific name	Innesoconcha rosacea
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INNESOCONCHA ROSACEA ( IREDALE, 1944)

( FIGS 5K–O View Figure 5 , 6J View Figure 6 , 22G–I View Figure 22 , 25 View Figure 25 , 26 View Figure 26 ; TABLE 1 View Table 1 )

Tribocystis rosacea Iredale, 1944: 323 View in CoL , pl. 20, fig. 7.

Melloconcha rosacea Smith, 1992: 238 View in CoL ; Stanisic et al., 2010: 346–347; Hyman & Köhler, 2020: 112.

Tribocystis alma Iredale, 1944: 324 .

Melloconcha alma Smith, 1992: 237 .

Type material: Holotype, AM C.38940 ( Fig. 5K View Figure 5 ), near The Pines (31°32.08′S, 159°4.14′E), 1912, R.Bell. GoogleMaps

Holotype of Tribocystis alma, AM C. 63477 ( Fig. 5L View Figure 5 ), North Ridge , between North Bay & Hunter Bay (31°31.06′S, 159°2.97′E), 1905, R.Bell. GoogleMaps

Material examined: See Table 1 View Table 1 .

Description

External morphology: Shell ( Fig. 5K–O View Figure 5 ) small ( SW 3.7–4.1 mm, SH 1.7–2.2 mm), 4.8–5.2 whorls, highly glossy, slippery, orange-brown to reddish brown, discoidal with a flat or slightly raised spire. Protoconch and teleoconch sculptured with fine microspiral grooves. Whorl profile rounded above and below a rounded periphery, sutures flat. Animal ( Fig. 6J View Figure 6 ) grey, with darker grey eyestalks and tail tip. Right shell lappet long, narrow, finger-shaped, left shell lappet absent.

Pallial caƲity: Pigmentation absent; mantle gland present.

ReproductiƲe system ( Fig. 25 View Figure 25 ): Oviduct with six eggs, one to three embryos. Penis short, not coiled; epiphallus enters penis through a simple pore or small verge (present in one specimen); penis internally flat, one to two longitudinal penis pilasters present; apical diverticulum on penis present. Penial tunica enclosing penis (not coiled) and epiphallus. Epiphallus shorter than penis, internally without sculpture.

Radula ( Fig. 22G–I View Figure 22 ): Marginal teeth with ectocones slightly shorter and narrower than mesocone, multicuspidate. Radular formula (18.4.1.4.18) × 69.

References

Hyman IT, Kohler F. 2020. A field guide to the land snails of Lord Hoaee Island. Sydney: Australian Museum Scientific Publishing.

Iredale T. 1944. The land Mollusca of Lord Howe Island. Australian Zoologist 10: 299 - 334.

Smith BJ. 1992. Non-marine Mollusca. In: Houston WWK, ed. Zoological catalogue of Australia, Vol. 8. Canberra: Australian Government Publishing Service, 1 - 408.

Stanisic J, Shea M, Potter D, Griffiths O. 2010. Australian land snails. 1. A field guide to eastern Australian species. Riviere des Anguilles: Bioculture Press.

Figures

Figure 5. Shells of Innesoconcha.A,B,Innesoconcha catletti.A,AM C.101187 (syntype).B, AM C.101188 (syntype of I.catletti major). C, Innesoconcha aberrans, AM C.63475 (holotype). D, Innesoconcha delecta, AM C.63478 (holotype). E, Innesoconcha doppelganger sp. nov., AM C.592779 (holotype). F, Innesoconcha flaƲescens, AM C.40600 (syntype). G, Innesoconcha grata, AM C.63479 (lectotype). H, Innesoconcha miranda, AM C.39175 (holotype). I, Innesoconcha prensa, AM C.63476 (holotype). J, Innesoconcha princeps, AM C.38958 (syntype). K, L, Innesoconcha rosacea. K, AM C.38940 (holotype). L, AM C.63477 (holotype of Melloconcha alma). M, Innesoconcha segna, AM C.114789 (possible holotype).

Figure 6. Live individuals of Innesoconcha. A, Innesoconcha catletti, AM C.532582, Research Station. B, Innesoconcha aberrans, AM C.593857, Mount Lidgbird mid-south-western slopes. C, Innesoconcha delecta, AM C.574679, Mount Gower summit. D, Innesoconcha flaƲescens, AM C.532623, Boat Harbour. E, I. flaƲescens, AM C.574741, Mount Lidgbird lower northern slopes. F, Innesoconcha grata juvenile, AM C.593.893, Mount Lidgbird mid-south-western slopes. G, Innesoconcha prensa, AM C.583114, Mount Gower summit. H, Innesoconcha princeps, AM C.574711, Mount Gower summit. I, I. princeps juvenile, AM C.574683, Mount Gower summit. J, Innesoconcha rosacea, AM C.583117, Dinner Run. Images by A. Moussalli (A, D), C. Stehn (B, C, E, F, H, I) and F. Köhler (G, J).

Figure 22. Radulae. Column one shows central tooth and adjacent laterals, column two shows the transition between lateral and marginal teeth, and column three shows the outer marginal teeth. A–C, Innesoconcha prensa, AM C.91378, Mount Gower. D–F, Innesoconcha princeps, AM C.91377, Mount Gower. G–I, Innesoconcha rosacea, AM C.391700, Old Settlement Beach. Scale bars: 20 µm (A–F); 10 µm (G–I).

Figure 25. Reproductive system of Innesoconcha rosacea. A, AM C.589618, Mount Eliza (clade X), reproductive system. B, C, AM C.583120, Mount Lidgbird (clade X). B, penis with tunica removed. C, penis interior. D, E, AM C.583117, Dinner Run Creek (clade Y). D, penis with tunica removed. E, penis interior. Scale bars: 1 mm.

Figure 26. Map showing the known range of Innesoconcha rosacea, based on collections data of the Australian Museum. A, historical collection data, showing how recorded distribution has changed over time. B, sequenced specimens, showing the distribution of clade X and clade Y from the phylogenetic tree.