Javania cristata Cairns & Polonio, 2013, n. sp
| Main Authors: | Cairns, Stephen D., Polonio, Virginia |
|---|---|
| Format: | info publication-taxonomictreatment Journal |
| Terbitan: |
, 2013
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6151623 |
Daftar Isi:
- Javania cristata, n. sp. Figs. 4 K–M, 19 Javania cailleti (Duchassaing & Michelotti, 1864): Cairns, 1982: 46–48 (in part: Eltanin 1592, pl. 14, figs. 11–12). Description: The corallum is ceratoid to trochoid in shape, straight or irregularly bent, and attached by a slender, stereome-reinforced pedicel, which is up to 4.9 mm in diameter (PD:GCD = 0.21–0.26). The largest specimen (PAT 1208 DR 9) is 18.8 x 16.3 mm in CD and 35 mm in height. The holotype measures 15.0 x 12.6 mm in CD, 23.4 mm in height, and 3.3 mm in PD (broken). The ratio of GCD:LCD ranges from 1.1 to 1.7, but is most commonly about 1.2. The theca is white, porcellaneous, and smooth, except in the upper half of large coralla especially near the calice, where the C 1–2 are sharply ridged, standing up to 1.7 mm in height. The septa are hexamerally arranged in four complete cycles according to the formula: S 1>S 2>S 3 >>S 4. Below a GCD of 9 mm only three cycles of septa are present, the fourth cycle appearing between a GCD range of 9–12 mm, at this transitional stage the S 4 being quite rudimentary, seen only deep within the corallum. Even in mature coralla, the S 4 are small, terminating several mm below the calicular edge. S 1 are highly exsert (up to 6.4 mm), and have sinuous axial edges that come close to meeting in the center of the calice, defining a deep and narrow central fossa. The S 2 are slightly less exsert (up to 2.2 mm) and less wide than the S 1. The S 3 are less exsert (up to 0.8 mm) and slightly less wide than the S 2. As mentioned, the S 4 are small to rudimentary, not attaining the calicular edge and thus not exsert. The lower axial edges of the S 1–3 are sinuous, and the septal faces adjacent to the axial edges bear elongate obliquely oriented ridges. Remarks. Cairns (2004) listed and keyed the ten Recent species of Javania. In this key, J. cristata is most similar to J. exserta Cairns, 1999, but can be distinguished by its narrower pedicel diameter, sinuous axial septal edges, and less exsert septa. Furthermore, J. exserta is known only from the western Pacific at much shallower depths (91–291 m). Javania cristata is also similar to J. cailleti, especially forma nobile as described by Verrill (1885), but differs in having S 1 larger than their S 2 and in having extremely sinuous axial septal edges. Distribution. Continental slope off central Argentina, and Burdwood Bank (Fig. 19), 461–1647 m. Material/ Types. Holotype: PAT0209DR 11, USNM 1193329. Paratypes: PAT0108DR 1, 10, MNCN; PAT0108DR 7, 8, MNCN; PAT 0108DR 11, 1, MNCN; PAT0108DR 15, 1, MNCN; PAT 1008 DR 1, 10, MNCN 2.04/ 1100; PAT 1008 DR 4, 2, MNCN; PAT 1008 DR 5, 1, MNCN; PAT 1008 DR 9, 13, MNCN; PAT 1008 DR 10, 9, MNCN 2.04/ 1098, and 1, USNM 1193327; PAT 1008 DR 12, 6, MNCN; PAT 1008 DR 13, 3, MNCN; PAT0108DR 14, 2, MNCN; PAT 1008 BC 24, 3, USNM 1193330; PAT 1108 DR 3, 3, MNCN; PAT 1108 DR 4, 2, MNCN; PAT 1108 DR 5, 2, MNCN; PAT 1108 DR 9, 1, MNCN; PAT 1108 DR 10, 1, MNCN; PAT 1108 DR 11, 1, MNCN; PAT 1208 DR 1, 11, MNCN 2.04/ 1101; PAT 1208 DR 7, 1, MNCN; PAT 1208 DR 9, 6, MNCN; PAT 1208 DR 11, 2, MNCN; PAT 1208 DR 16, 1, MNCN; PAT0209DR 3, 2, MNCN; PAT0209DR 5, 3, MNCN; PAT0209DR 8,2, MNCN; PAT0209DR 14, 3, MNCN; PAT0209DR 16, 3, MNCN, and 2, USNM 1193326; PAT0210DR 7, 2, MNCN 2.04/ 1099; PAT0210DR 8, 1, MNCN; PAT0210DR 9, 1, MNCN 2.04/ 1102; ATL09Lo 59, 2, USNM 1193328; Eltanin 1592, 1, USNM 47530. Type locality. 43.981 °S, 59.291 °W (off Punta Clara, Argentina), 1500 m. Etymology. From the Latin cristatus (meaning crested, ridged), an allusion to the prominently ridged C 1–2.
- Published as part of Cairns, Stephen D. & Polonio, Virginia, 2013, New records of deep-water Scleractinia off Argentina and the Falkland Islands in Zootaxa 3691 (1), DOI: 10.11646/zootaxa.3691.1.2, http://zenodo.org/record/222205