Textiliomurex chodmonensis, Merle & Pacaud & Ledon & Goret, 2024

Merle, Didier, Pacaud, Jean-Michel, Ledon, Daniel & Goret, Bernard, 2024, New Cenozoic Muricidae (Mollusca: Gastropoda) from Europe, Geodiversitas 46 (15), pp. 495-551 : 527

Textiliomurex chodmonensis n. sp.

( Figs 19 A-D; 27I, J)

urn:lsid:zoobank.org:act:C498F221-B504-40D3-A082-2DBCAC1E7D78

TYPE MATERIAL. — Holotype. France • Paris Basin , Oise , Chaumont-en-Vexin ( Carrière Darcy ); Calcaire Grossier inférieur (biozone NP14); middle Eocene (lower Lutetian); MNHN.F.A81144 (Pacaud coll.), H: 28 mm ( Figs 19A, B ; 27I ).

Paratype. France • 1 spm; same as for the holotype; MNHN.F.A81145 (Pons coll.) ( Figs 19C, D ; 27J ) .

ETYMOLOGY. — Name from the type locality Chaumont-en-Vexin. This place name comes from the Celtic words Chod “wood” and Mon “montain”.

TYPE HORIZON. — Calcaire Grossier inférieur (biozone NP14), see Gély & Lorenz (1991: pl. 1), middle Eocene (lower Lutetian).

TYPE LOCALITY. — France, Paris Basin, Oise, Chaumont-en-Vexin (Carrière Darcy), see Ott d’Estevou et al. (2014).

DISTRIBUTION. — Only known from the type locality.

DESCRIPTION

Protoconch not preserved. Fusiform teleoconch up to 28 mm in height, up to 21 mm in width. High spire, up to seven rounded whorls. Last whorl (seventh whorl) up to 65% of total length. Apical angle 55°. Spiral sculpture with fine, narrow, well marked primary and secondary cords. First to third whorl not preserved. Fourth whorl: IP, s1 and P2. Fifth whorl: appearance of the secondary cord adis (sutural ramp). Sixth whorl: addition of tertiary cords on sutural ramp and convex part of whorl. Seventh and last whorl: IP, adis and abis (sutural ramp), P1 to P6 (convex part of the whorl); P6 placed on base on convex part of whorl; ADP, MP, ABP (siphonal canal), MP, ABP poorly distinct from secondary cords; primary and secondary cords of same thickness. Surface of shell with numerous threads. Axial sculpture with nine varices on fourth whorl, seven on fifth whorls, six on sixth whorls and five on seventh and last whorl. Nodulose varices. No intervarices. No varical spine. Numerous, fine microlamellae covering entire surface forming scabrous microsculpture. Ovate aperture up to 36% of diameter and up to 70% of length of last whorl (including siphonal canal). Columellar lip adherent, smooth. Parietal lip adherent. Short anal sulcus. No shoulder channel. Outer lip with subobsolete internal denticles. Outer lip finely crenulated. Pseudoumbilicus wide. Siphonal canal open, up to 38% of apertural length, slightly dorsally recurved.

COMPARISONS

Textiliomurex chodmonensis n. sp. can be compared to two other species from the middle Lutetian: T. textiliosus ( Lamarck, 1803) and T. bernayi ( Deshayes, 1865) . Textiliomurex textiliosus differs in having a shorter spire, a more inflated last whorl, a wider aperture, and a longer siphonal canal bearing a narrower pseudoumbilicus. Textiliomurex bernayi has angular teleoconch whorls with a marked P1 shoulder, bears well developed internal denticles within the outer lip and cannot be confused with T. chodmonensis n. sp. (see Merle et al. 2011: 126, text. fig. 47 and pl. 94 about Textiliomurex ).

Figures

FIG. 19. — Spiral cords and internal denticles of the outer lip in Textiliomurex chodmonensis n. sp. (A-D) and Ponderia remyi n. sp. (E, H): A, B, holotype, MNHN.F.A81144 (Pacaud coll.), Chaumont-en-Vexin (Carrière Darcy), Oise, Paris Basin, France, middle Eocene (Lutetian); C, D, paratype, MNHN.F.A81145 (Pons coll.), Chaumont-en-Vexin (Carrière Darcy); E, F, holotype, MNHN.F.A90548 (Remy coll.), Fresville, Manche, Normandy, France, middle Eocene (Lutetian); G, H, MNHN.F.A90555, Fresville (Remy coll.). Scale bars: 10 mm. Credits: P. Loubry (MNHN/CNRS).

FIG. 27. — New species of Timbellus De Gregorio, 1885, Pterynotus Swainson, 1833 (Pterymarchia Houart, 1995), Textiliomurex Merle, 2011, Ponderia Houart, 1986 and Flexopteron Shuto, 1969: A-C, Timbellus submicropterus n. sp.: A, holotype, MNHN.F.A24111 (MNHN coll.), Fresville, France, Lutetian; B, paratype, MNHN.F.A24126 (Munier-Chalmas coll.), Gourbesville, France, Lutetian; C, paratype, UCBL-EM 33438 (Bourdot coll.), Fresville; D, T. cf. submicropterus n. sp., MNHN.F.A90557 (Brébion coll.), Saint-Aignan-Grand-Lieu (Pierre-Aiguë), France, Bartonian; E, F, Pterynotus (Pterymarchia) gaasensis n. sp.: E, holotype, MNHN.F.A32492 (Merle coll.), Gaas (Espibos), France, Rupelian; F, paratype, MNHN.F.A90554 (Merle coll.), Gaas (Espibos); G, H, P. (P.) pelouatensis n. sp.: G, holotype, MNHN.F.J09945, Saucats (Peloua), France, Burdigalian; H, paratype, MNHN.F.J17632, Saucats (Peloua); I, J, Textiliomurex chodmonensis n. sp.: I, holotype, MNHN.F.A81144 (Pacaud coll.), Chaumont-en-Vexin (Carrière Darcy), France, Lutetian; J, paratype, MNHN.F.A81145 (Pons coll.), Chaumont-en- Vexin (Carrière Darcy); K, L, Ponderia remyi n. sp.: K, holotype, MNHN.F.A90548 (Remy coll.), Fresville, Lutetian; L, paratype, MNHN.F.A90555, Fresville (Remy coll.); M, N, Flexopteron constantinense n. sp.: M, paratype, MNHN.F.A77761 (MNHN coll.), Carentan-les-Marais (Cauvin), France, Priabonian; N, holotype, MNHN.F.A77760 (MNHN coll.), Carentan-les-Marais (Cauvin). Scale bars: A-D, I-L, 10 mm; E-H, N, 5 mm; M, 3 mm. Credits: A, B, D-F, N, P. Loubry (MNHN/ CNRS); C, E. Robert (UCBL).