Bolbozoe anomala Barrande, 1872

Legiot, Nicolas, 2019, Silurian myodocope ostracods from Poland, Acta Palaeontologica Polonica 64 (2), pp. 379-397 : 381-383

Bolbozoe anomala Barrande, 1872

Fig. 2A, B .

1861 E. divisa MSS. ; Jones (in Salter) in Howell and Geikie 1861: 137

(GSM 36876). 1868 Entomis divisa Jones ; Bigsby 1868: 74. 1868 Bolbozoe anomala Barr. ; Bigsby 1868: 200. 1870 Entomis divisa Jones ; Jones 1870: pl. 61: 12 (GSM 36876). 1872 Bolboz. anomala Barr. ; Barrande 1872: 501, pl. 24: 27, 28 (NM-L

13993), 29, 30 (NM-L 23572). 1872 Bolboz. Jonesi Barr. ; Barrande 1872: 503, pl. 27: 8 (NM-L 23650

[ex. NM-1600]); pl. 31: 4–6 (NM-CF 1242). 1873 Entomidella divisa Jones ; Jones 1873: 416 (GSM 36876). 1878 Entomis divisa Jones ; Salter 1878: 130 (GSM 36876). 1884 Bolbozoe divisa Jones ; Jones 1884: 401, pl. 15: 4 (GSM 36876). 1900 Bolbozoe (?) italica n. f.; Canavari 1900: 208, pl. 26: 16 (I 97a),

17 (I 97b), 18 (I 98). 1900 Bolbozoe (?) capellinii n. f.; Canavari 1900: 208, pl. 26: 19. 1900 Bolbozoe (?) lanceolata n. f.; Canavari1900: pl. 26: 20 (I 99). 1934 Bolbozoe anomala Barrande ; Bassler and Kellett 1934: 215. 1934 Bolbozoe (?) lanceolata Canavari; Bassler and Kellett 1934: 215. 1934 Bolbozoe (?) capellinii Canavari; Bassler and Kellett 1934: 215. 1934 Bolbozoe (?) italica Canavari; Bassler and Kellett 1934: 215. 1936 Bolbozoe anomala Barrande ; Bouček 1936: 62. 1937 Bolbozoe (?) lanceolata Canavari; Chaubet 1937: pl. 7: 19 (UMCIP-VP 7). 1954 Bolbozoe anomala Barrande ; Hughes 1954: 42. 1958 Bolbozoe anomala Barrande ; Pokorný 1958: 315. 1961 Bolbozoe anomala Barrande ; Sylvester-Bradley 1961: 395, textfig. 316.1c–f. 1985 gen. nov. A sp. nov. 1; Lethiers et al. 1985: 57, pl. 5: 1. 1985 gen. nov. A sp. nov. 2; Lethiers et al. 1985: 57, pl. 5: 3. 1985 gen. nov. C sp. nov. 1; Lethiers et al. 1985: 57, pl. 5: 4.

1987 Bolbozoe cf. anomala Barrande ; Siveter et al. 1987: pl. 85: 3, 8–11; pl. 86: 1–6, pl. 87: 8, text-fig. 7.

1988 Bolbozoe (Bolbozoe) anomala Barrande ; Přibyl 1988: 119.

1988 Bolbozoe (Bolbozoe) jonesi Barrande ; Přibyl 1988: 118.

1990 Bolbozoe cf. anomala Barrande, 1872 ; Siveter and Vannier 1990: text-fig. 7c–d.

1990 “ Bolbozoe ” cf. anomala Barrande ; Siveter and Vannier 1990: text-figs. 13C, 13F, 23.

1991 Bolbozoe cf. anomala Barrande ; Siveter et al. 1991: pl. 1: 1; pl. 2: 2, 5.

1992 “ Bolbozoe ” cf. anomala Barrande ; Vannier and Abe 1992: pl. 2: 1; text-fig. 1A.

2009 Bolbozoe anomala Barrande, 1872 ; Gnoli et al. 2009: pl. 2: 1–15.

2011 Bolbozoe anomala Barrande, 1872 ; Perrier et al. 2011: pl. 1: 1–20; text-figs. 6, 7H, 8, 9B, 10.

2012 Bolbozoe anomala Barrande, 1872 ; Perrier 2012: text-fig. 7C, D.

2013 Bolbozoe anomala Barrande, 1872 ; Perrier and Siveter 2013: text-fig. 22.6C.

2019 Bolbozoe anomala Barrande, 1872 ; Perrier et al. 2019: pl. 3: 1–18.

Type material: Lectotype: a right valve, NM-L 23572 (ex. CE1194);

Barrande (1872: pl. 24: 29, 30); Perrier et al. (2011: pl. 1: 1); designated by Přibyl (1988: 119). Paralectotype: a left valve, NM-L 13993;

Barrande (1872: pl. 24: 27, 28); Perrier et al. (2011: pl. 1: 2); designated by Přibyl 1988: 119. All from type locality.

Type locality: Lochkov suburb of Prague, Czech Republic .

Type horizon: Požáry Formation, Pridoli Series, stratigraphical division e2 of Barrande 1872 ( Kříž 1992).

A) mm (Height B Length (mm)

Material.—Tens of valves, from three localities (Widełki, Niestachów, and Kielce), Holy Cross Mountains, Poland; Ludlow Series, Silurian.

Measurements (in mm).—Size range:L = 1.8,H = 1.25 ( ZPAL O.63/24) to L = 8.25, H = 6 ( ZPAL O.63/25). Lectotype: L = 8.50, H = 5.95 ( NM-L 23572). Paralectotype: L = 7.10, H = 4.95 ( NM-L 13993). L/H ratio and adductor muscle position for four specimens from two localities ( Fig. 3).

Description.—Adult valve sub-ovoid, slightly tapering posteriorly.Anterior third of valve mostly occupied by a large hemispherical bulb forming c. 20–25% of valve area; bulb-centre lies just above valve mid-height and well above other surface areas of valve. Maximum valve length is just above bulb mid-height; maximum valve height is at mid-length and maximum valve width is at central part of bulb. Right valve overlaps left valve along ventral margin. A deep, narrow sulcus surrounds the bulb posteriorly and ventrally. An adductor muscle scar consisting of a single series of 7–8 inclined, almost parallel individual scars including about seven furrows, occurs at mid-length in the sulcus. Rostrum is very small, in some cases beak-like or absent. Rostral incisure slit-like, as seen in 3D preserved carapaces in anterior view. Early growth stages are more rounded in valve outline and the bulb is relatively larger than in adults.

Stratigraphic and geographic range.—Ludlow Series, Holy Cross Mountains. Also known from the upper part of the Wenlock to at least the middle part of the Pridoli Series; the Czech Republic, France, Sardinia ( Perrier et al. 2011), Wales and England ( Perrier et al. 2019). If Bolbozoe jonesi is conspecific with Bolbozoe anomala the range of the species would extend into the Lochovian Series, Lower Devonian (see Perrier et al. 2011).

Figures

Fig. 2. Selected Silurian myodocope species, Holy Cross Mountains, Poland; Ludlow Series, Silurian. A, B. Bolbozoe anomala Barrande, 1872. A. ZPAL O.63/1, incomplete left valve. B. ZPAL O.63/2, juvenile right valve. C. Bolbozoe psittaca Perrier, Siveter, Williams, and Palmer, 2019, ZPAL O.63/3, left valve. D, E. Parabolbozoe bohemica (Barrande, 1872). D. ZPAL O.63/4, juvenile left valve. E. ZPAL O.63/5, right valve. F. Richteria migrans (Barrande, 1872), ZPAL O.63/6, left valve. G, H. Nudator angiportatus Perrier, Siveter, Williams, and Palmer, 2019. G. ZPAL O.63/7, juvenile left valve. H. ZPAL O.63/8, left valve. I, J. Nudator inflatus Perrier, Siveter, Williams, and Palmer, 2019. I. ZPAL O.63/9, right valve showing post-mortem diagenetic structures. J. ZPAL O.63/9, right valve. K. Silurocypridina retroreticulata Perrier, Vannier, and Siveter, 2011, ZPAL O.63/10, incomplete right valve. L. Silurocypridina calva Perrier, Vannier, and Siveter, 2011, ZPAL O.63/11, right valve. M. Cypridinid?, ZPAL O.63/12, right valve. All light photographs in lateral view. A–H, J, M, silicone casts of external moulds; I, K, L, internal moulds. Scale bars 1 mm, except M 2 mm.