Kora rupestris Simone

Pena, Meire Silva, 2024, Notes on Kora and description of a new species from Minas Gerais, Southeast Brazil (Mollusca: Gastropoda: Stylommatophora), Zoologia (e 23059) 41, pp. 1-11 : 2-6

publication ID	https://doi.org/ 10.1590/S1984-4689.v41.e23059
publication LSID	lsid:zoobank.org:pub:76D4BFC5-CABA-4972-A30E-0DD7C42C501A
persistent identifier	https://treatment.plazi.org/id/03B96F07-A945-255A-FCEC-D1B5FBF72F5F
treatment provided by	Felipe
scientific name	Kora rupestris Simone
status

Treatment

Kora rupestris Simone View in CoL & Salvador, 2016

Holotype: Museu de Zoologia, Universidade de São Paulo ( MZSP) HTMZSP 12412 View Materials ; Paratypes: MZSP 12 View Materials .441.

Type locality: Brazil, Bahia, Carinhanha ( Salvador and Simone 2016).

Diagnosis: Kora rupestris was distinguished from K. corallina by protoconch sculpture and thinner profile ( Salvador and Simone 2016). Salvador and Simone (2021) featured K. rupestris shells from PARNA Cavernas do Peruaçu, which we describe herein as a new species based on evidence from the morphology of the shell and the soft part.

Redescription: shell ( Fig. 2A–I View Figure 2 ) conical-fusiform, brown in color (Küppers N 30 A 80 M 50) with slightly darker body whorl (Küppers N 80 A 50 M 50) and lighter narrow subsutural band (Küppers N 10 A 50 M 20). The studied material contains a morphotype with a darker color pattern (Küppers N 70 A 40 M 40) in all whorls but maintaining the lighter subsutural band (Küppers N

) ( Fig. 2B, D View Figure 2 ). Protoconch ( Fig. 2G–I View Figure 2 ) with two whorls, and a wide and flat core; first whorl smooth, second with delicate discontinuous axial grooves. Teleoconch with wider and straighter grooves than the protoconch. Suture non-crenulated. Aperture oval, slightly inclined relative to columellar axis; columellar axis ( Fig. 2E–F View Figure 2 ) not lamellar. Peristome deflected, wide and with clear columellar lip (Küppers N 20 A 30 M 10); parietal lip not thickened. Dimensions (in mm, n = 30 shells): H = 42.20–48.00; W = 19.45–24.80; ah = 22.95–18.40; aw = 4.00–12.85; wn = 7 ¼.

Softs parts ( Fig. 3A–F View Figure 3 ): cephalopedal mass dark gray (Küppers N 70 A 40 M 10) with grooves forming a reticulated surface on the dorsum and light gray (Küppers N 60 A 40 M 10); ventral region with smooth surface. Genital pore below right ommatophore. Mantle edge, in ventral view, ( Fig. 3B View Figure 3 ) thick, with wide and continuous external lobe, with acuminate angle at end that accommodates the pneumostome. Inner lobe with three thin flaps partially detached from outer lobe one flap adjacent to pneumostome, second extending from pneumostome to median region, third extending from median region to opposite end of pneumostome. Pneumostome circular, flanked by anal slit. Pallial roof, in ventral view ( Fig. 3A View Figure 3 ), with translucent surface with dense embossed venation between edge of secondary ureter and median region of mantle edge. Pulmonary vein anteriorly branched, connected by numerous perpendicular and branched vessels from mantle edge to pericardial cavity. Transverse venation extending to bottom of pallial cavity between kidney and rectum. Kidney elongated, triangular with the most acuminate apex passing through the pericardium. Primary ureter as a lighter band attached to side of kidney; secondary ureter fully closed, running lateral to rectum. Pericardial sac partially opaque, tapered at both ends.

Digestive system: jaw ( Fig. 4A View Figure 4 ) arched, comprising 17 folds of non-uniform widths, central four narrower than distal folds. Radula ( Fig. 4B–C View Figure 4 ): with rows of approximately 102 monocuspid teeth of regular size and shape, without distinction between central, lateral, and marginal teeth. Teeth narrow with long base and free end curved like a hook and slightly pointed; free end of each tooth with an elongated concavity (visualized under higher magnification. Digestive tube ( Fig. 3C View Figure 3 ): buccal bulb with very prominent radular nucleus that is slightly curved upwards. Esophagus diameter wider at crop. Salivary glands latero-basal; each gland with only one duct departing towards dorsal region of buccal bulb where it penetrates each side of the point of junction with the esophagus. Posterior esophagus equal in diameter to stomach. Stomach tubular, recurved, with delicate translucent walls.

Reproductive system ( Fig. 3D–F View Figure 3 ): ovariotestis with single grouping of finger-like follicles with darker distal ends that internally fill digestive gland between third and fourth turn of the visceral mass; delicate tubules depart from various points of the grouping, which, reuniting near distal end of the gonad, form the hermaphrodite duct. Hermaphrodite duct undergoes great thickening, greater pigmentation and becomes coiled reaching ventral face of albumen gland connecting to the fertilization complex. Fertilization complex ( Fig. 3E View Figure 3 ) elongated, tubular, with circular fold at mid-length that directs it upwards; second fold directs blind end forward. Albumen gland voluminous, translucent, short, and widely connected to ovispermoduct. Ovispermoduct long, twisted, uterus walls forming transverse folds throughout its extension. Prostate surface granular, adhered to uterine wall from albumen gland to just before oviduct bifurcation with bursa copulatrix duct. Bursa copulatrix duct originates in the oviduct just below vas deferens exteriorization; diameter constant for approximately 1/5 of its course, dilating slightly, narrowing again for last 1/5 of its course to encounter the bursa. Bursa copulatrix oval; vagina length equivalent to less than half of that of free oviduct. Vas deferens ( Fig. 3F View Figure 3 ) emerging in oviduct just above bursa copulatrix duct bifurcation, descending towards penial complex, passing below muscular sheath of phallus, running externally through phallus and epiphallus, penetrating its limit with flagellum. Penial complex long, tubular, with three convoluted folds along its course; next to the vagina it has a muscular sheath corresponding in length to that of the oviduct. Phallus practically constant in diameter, slightly tapering distally; no external distinction from epiphallus; flagellum short, terminally attached to retractor phallus muscle.

Material examined: Brazil, Minas Gerais, Itacarambi, PARNA Cavernas do Peruaçu , Fazenda ICIL Volta da Serra , Col. Mol. MCNPUC 301 (22 specimens preserved in ethanol), 13 December, 2010, M.S. Pena, A. Suhett, D.C. Souza cols. I ; PARNA Cavernas do Peruaçu , Estrada Fazenda Sr Odilon, Col. Mol. MCN PUC 575 View Materials (10 specimens preserved in ethanol), December, 2022, J.S. Silva, M.S.Pena, I.Santos Silva cols .; PARNA Cavernas do Peruaçu , ICIL, Volta da Serra , Col. Mol. MCNPUC 249 (51 shells), December 2010, M.S.Pena, A. Suhett, D.C.Souza, cols .