Siphogenerina Schlumberger 1882 (Milne-Edwards 1882
Creators: name: Mamo, Briony L.
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Chromista
Foraminifera
Globothalamea
Rotaliida
Siphogenerinoididae
Siphogenerina

description: Siphogenerina Schlumberger 1882 (Milne-Edwards 1882)
Siphogenerina raphana (Parker & Jones 1865) (Fig. 18:20, 21)
1865 Uvigerina (Sagrina) raphanus Parker & Jones, p. 354, pl. 18, figs 16, 17.
1884 Sagrina raphanus (Parker & Jones); Brady, p. 585, pl. 75, figs 21–24.
1932 Siphogenerina raphanus (Parker & Jones); Parr, p. 225, pl. 21, fig. 24.
1978 Rectobolivina raphana (Parker & Jones); Cheng & Zheng, p. 204, pl. 18, figs 13–15. 1993 Siphogenerina raphana (Parker & Jones); Haig, p. 170, pl. 3, figs 8–10.
1994 Siphogenerina raphana (Parker & Jones); Loeblich & Tappan, p. 123, pl. 240, figs 1–11. 2009 Siphogenerina raphana (Parker & Jones); Parker, p. 469, fig. 338a–j.
2012 Siphogenerina raphana (Parker & Jones); Debenay, p. 169, pl. 11.
Description. See Parker (2009, p. 469, fig. 338a–j) and Parker & Jones (1865, p. 354, pl. 18, figs 16, 17).
Remarks. Siphogenerina raphana (Parker & Jones 1865) is characterised by an elongate, cigar-shaped test with a uniserial chamber arrangement and strong, radiating costae. The chambers are finely perforate, but the perforations are absent over and around the depressed sutures. The terminal apertures have a thick lip that extends around and down into the test. The aboral end is rounded and chambers are slightly inflated (Fig. 18:9, 10).
The strength of the costate ornament of S. raphana is highly variable. Capricorn Group specimens tended to possess costae that fluctuated in definition along the test’s length, as similarly seen in Parker’s (2009, fig. 338) specimens. The development of the thick apertural lip is also particularly variable, ranging from thin, produced and with a distinct neck (Brady 1884; Parr 1932a; Loeblich & Tappan 1994), to thick and only partially encircling the aperture and not produced. These latter forms are evident in CG collections (Fig. 18:10) and others (Cheng & Zheng 1978; Haig 1993; Loeblich & Tappan 1994; Parker 2009; Debenay 2012).
No type locality has been designated for this species, but it has a widespread distribution (West Indies, Panama, India, Hong Kong and Australia—Ellis & Messina 1940; Bass Strait from 69–72 m, Admiralty Islands from 29–46 m, Philippines 174–183 m, Tahiti from 768 m—Brady 1884; Victorian coast, Australia—Parr 1932a; Xisha Islands—Cheng & Zheng 1978; Papuan Lagoon—Haig 1993; Sahul Banks from 22–271 m, western Timor Sea from 86–146 m—Loeblich & Tappan 1994; Ningaloo Reef—Parker 2009; Bay of Prony from 10–30 m— Debenay 2012). Quilty (1977) listed specimens as Rectobolivina raphanus (Parker & Jones, 1865) from mobile sand bar sediments at Hardy Inlet, south Western Australia and Haig (1997) from Exmouth Gulf, Western Australia.
Distribution within study area. Siphogenerina raphana was collected from all sampled reefs, except Sykes Reef. It was particularly abundant at site 19 in Wistari Lagoon, but it was most frequently collected from One Tree Lagoons 1 and 2. This taxon was absent from Heron Lagoon, but was found on Heron Reef flat in low numbers (one specimen per site).
description: Published as part of Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, pp. 1-123 in Zootaxa 4215 (1) on pages 78-79, DOI: 10.11646/zootaxa.4215.1.1, http://zenodo.org/record/272923