Callospiriferina ongleyi ( Marwick 1953 )

Macfarlan, Donald Alexander Bankier, 2023, Latest Triassic and Early Jurassic Spiriferinida (Brachiopoda) of Zealandia (New Zealand and New Caledonia), Zootaxa 5277 (1), pp. 1-58 : 23-27

publication ID	https://doi.org/ 10.11646/zootaxa.5277.1.1
publication LSID	lsid:zoobank.org:pub:9273881B-D09E-4958-B1CD-59E97339BF32
DOI	https://doi.org/10.5281/zenodo.7891536
persistent identifier	https://treatment.plazi.org/id/03AD87E3-FFDC-FF9A-FF5D-51E93B7EC7A3
treatment provided by	Plazi
scientific name	Callospiriferina ongleyi ( Marwick 1953 )
status

Treatment

Callospiriferina ongleyi ( Marwick 1953) .

Fig. 8E View FIGURE 8 , Fig. 15 View FIGURE 15 : 1–21, Fig. 16 View FIGURE 16 : 1–6.

1923 Spiriferina (?) sp., Trechmann, 1923 p. 285, pl. XVI, figs 11 a, b.

1953 Spiriferina ongleyi Marwick , p. 86, pl. 15 fig. 18.

1978 Spiriferina ongleyi Marwick ; Suggate et al. p. 713 fig. 11.7 19.

1981 Spiriferina ongleyi Marwick ; Speden & Keyes, p. 44, pl. 17.19.

1992 “ Spiriferina ” ongleyi Marwick ; Damborenea & Manceñido p. 136, Pl. 2 fig. 1–3.

2009 Mentzelia ongleyi ( Marwick, 1953) ; MacFarlan et al. p. 266.

Holotype. BR 1117 from F45/f9446 ( GS 343 ) Flag Hill (Ben Bolt), an internal mould of a ventral valve, collected by A. McKay 1878.

Material. A total of 133 specimens from 24 collections were catalogued, of which 73 yielded valid measurements.

New Caledonia. Uitoé Peninsula: NC/f401 ( AU 9419), NC/f647 ( AU 9608). île Mara: NC/f0165 ( AU 5785), NC/f0170 ( AU 5790).

Kawhia Syncline. Te Maika Peninsula Kawhia: R 15/f8812 ( AU 14794). Coast north of Marokopa: R 16/f8644 ( GS 10005). Awakino Gorge: R 18/f0138 ( AU 18823).

Southland Syncline. Otapiri Stream: E45/f ( AU 2819), E45/f9452 ( GS 349). Ben Bolt: E45/f ( AU 6409), E45/f ( AU 9838), E45/f ( OU 47286), E45/f0076 (McF E34), E45/f0132 ( RBH 16), E45/f0178 ( AU 6639), E45/f0379 ( JDC 4069), E45/f9446 ( GS 343, JDC 737), E45/f9447 ( GS 344), E45/f9676 ( JDC 1382), E45/f9697 (McF E23). Otapiri Gorge: E45/f9452 ( GS 349). Otamita Valley, Peel Stream: F45/f0083 ( JGGM 157). Retreat–Croydon Road: F45/f8011 ( JDC 3479). Coneburn: F45/f8683 ( JDC 1393). Jewitt Road: E46/f0063 (? JDC 4661).

Description. Medium-sized spiriferinide, with dorsal valve generally 12–25 mm long, valves 15–30 mm wide. Hingeline straight, about 4/5 of valve width. Cardinal extremities, flanks and anterior margin rounded. Maximum width in posterior part. Dorsal valve generally wider than long, moderately and evenly convex posteriorly, with narrow, rounded fold anteriorly.

Ventral valve with narrow posteriorly directed umbo, broad, moderately low interarea, narrow, open triangular delthyrium. Valve moderately convex posteriorly, with narrow, U-shaped sulcus anteriorly, anterior commissure uniplicate.

Flanks of both valves with about 2 to 6 rounded costae, with some variation in strength between specimens, some are non-costate. No costae on fold or sulcus.

Concentric ornament of semiregular, stepped growth lines. Shell material punctate, exterior with fine tubular (?) spines ( Fig. 8E View FIGURE 8 ).

Internal Characters Dorsal valve with short hingeline with small round cardinal process ( Fig. 16.1 View FIGURE 16 ). Some specimens with paired, incised muscle scars separated by low ridge.

Ventral valve with a high, narrow median septum on floor of valve and thicker, curved dental plates which do not join to median septum ( Fig. 15.5, 15.8 View FIGURE 15 , Fig. 16.5 View FIGURE 16 , Fig. 16.6a View FIGURE 16 ). Small, slightly incised muscle scars visible on a few specimens ( Fig. 15.6 View FIGURE 15 ).

Dimensions. Dimensions of the holotype and statistics for specimens from key areas are shown in Table 5.

Range and distribution. Aratauran. Callospiriferina ongleyi is rare in New Caledonia and the Kawhia Syncline south of Kawhia. It is not found in the earliest Aratauran of Ben Bolt. The earliest appearance is at F45/f 8683 in the Coneburn (Middle Hettangian). In the Otapiri Valley it first appears at E45/f9452 (GS 349), where adjacent localities have yielded Late Hettangian ammonites ( Stevens 2004). It is common at a few localities on the northern slopes of Ben Bolt, and in the Otamita Valley, and appears to be part of a nearshore fauna.

Remarks. The shape, especially of the ventral valve, is variable. Costae are of variable strength but generally weak, and some specimens are smooth. Specimens from E45/f0379 (Ben Bolt) generally have stronger costae than those from some nearby localities.

Specimens from two collections from île Mara, New Caledonia are thick-shelled with dental plates partly submerged in callus ( Fig. 15.9, 15.13 View FIGURE 15 ). The lithology is a coarse to medium sandstone.

OU 46836 (E45/f9676) is proportionally broader, with deeply impressed muscle scars on the ventral valve. The dental plates are visible on the mould, but short. This appears to be similar to the île Mara specimens ( Fig. 15.18 View FIGURE 15 ). OU 46828 (E45/f9676) is relatively narrow, with a broad rounded sulcus demarcated by two relatively strong costae ( Fig. 15.10 View FIGURE 15 ).

Callospiriferina ongleyi is smaller and proportionally slightly wider than C. kawhiana ( Fig. 10B View FIGURE 10 ). The median septum and dental plates are narrower and more delicate than in C. kawhiana and muscle fields are not as well developed.

Juveniles and some small specimens can be difficult to distinguish from Cisnerospira antipoda . At similar size, C. ongleyi tends to be wider in proportion, and with a less inflated ventral valve. AU B737 (R16/f8642) is best placed in Cisnerospira antipoda (Fig. 12.3) but also has some resemblance to C. ongleyi .