Epistomaroides Uchio 1952

Mamo, Briony L., 2016, Benthic Foraminifera from the Capricorn Group, Great Barrier Reef, Australia, Zootaxa 4215 (1), pp. 1-123 : 86-87

publication ID

https://doi.org/ 10.11646/zootaxa.4215.1.1

publication LSID

lsid:zoobank.org:pub:B91D1782-C11A-4CDC-96B6-76104FEE51BD

DOI

https://doi.org/10.5281/zenodo.6067866

persistent identifier

https://treatment.plazi.org/id/0389064B-FFAF-3D38-3EEE-E603FAF7BED8

treatment provided by

Plazi

scientific name

Epistomaroides Uchio 1952
status

 

Epistomaroides Uchio 1952 View in CoL

Epistomaroides polystomelloides (Parker & Jones 1865) ( Fig. 20 View FIGURE 20 :15–17)

Description. See Parker & Jones (1865 p. 421, pl. 19, fig. 8).

Distribution within study area. Epistomaroides polystomelloides (Parker & Jones 1865) was found at 4 sites from Heron Reef flat, One Tree Lagoon 3 and the channel between Heron and Wistari Reefs with no more than one specimen collected per site.

Epistomaroides punctatus ( Said 1949) View in CoL ( Fig. 20 View FIGURE 20 : 18–20; Fig. 21 View FIGURE 21 :1–6)

1949 Epistomaria punctata Said , p. 37, pl. 4, fig. 23.

1980 Epistomaroides punctulata (d’Orbigny) ; Hansen & Rögl, p. 153, pl. 1, figs 4–6. 1984 Epistomaroides punctata (Said) ; Reiss & Hottinger, p. 246, fig. G29a–b. 1994 Epistomaroides punctatus (Said) ; Hottinger et al., p. 131, pl. 180, figs 1–11; pl. 181, figs 1–6.

Description. Test low trochospiral with slightly inflated chambers, rounded to lobate outline, rounded periphery.

Initial chambers partially obscured by a boss on umbilical side. Test coarsely perforate. Initial sutures flush and imperforate becoming deep intraseptal, interlocular spaces opening on both sides of test (to varying degrees) between last 4–6 chambers. Extensions of folia imperforate, bridging intraseptal spaces at their margins. Umbilical face smooth, imperforate, with an interiomarginal main aperture that lines the right side (or umbilical side) of the umbilical suture. The aperture at base of the umbilical face extends down and around to the anterior of test. Aperture possesses several small, clustered papillae around rim with a slight lip in some specimens. An additional anterio-lateral foliar aperture, also on the umbilical face, is located approximately half way up the face of the final chamber, also with rimming papillae but no lip. For further descriptions of this species see Hottinger et al. (1993, p. 131, pl. 180, figs 1–11; pl. 181, figs 1–6).

Remarks. Epistomaroides punctatus ( Said 1949) has a trochospiral test with inflated chambers and lobate outline, but the primary characteristics are the distinct sutures that become interlocular spaces in the final chambers and the anterio-lateral foliar aperture.

Epistomaroides punctatus differs from E. polystomelloides by having a more lobate outline, inflated chambers and lacking the thick, raised ornament that covers the entire early coiled chambers of the test and most of the final chambers of E. polystomelloides .

Unlike E. polystomelloides View in CoL , E. punctatus View in CoL has not been widely reported. Hansen & Rögl (1980) argued that E. punctatus View in CoL is identical with Anomalina punctata d’Orbigny 1826 and that Anomalina View in CoL should be the senior synonym since the original drawings clearly depict E. punctatus View in CoL . This was also argued by Loeblich & Tappan (1987) and Hottinger et al. (1993) who commented that the broad concept of Anomalina View in CoL in the original description resulted in a very generalised concept of the genus. However, this proposal was later withdrawn by Rögl and was also disputed by Revets (1994) who indicated that Anomalina View in CoL should not be suppressed, but the type species should be changed from Anomalina punctata d’Orbigny 1826 to Anomalina ariminensis d’Orbigny 1902 ( Fornasini 1902) View in CoL to rectify the confusion surrounding the genus. Revets (1994) argued that the relatively large size of E. punctatus View in CoL would have allowed d’Orbigny to observe significant morphological attributes though some key features such as the interseptal bridges and umbilical folia were not mentioned. The original illustrations of d’Orbigny’s (1826) appear different to E. punctatus View in CoL in that, despite sharing a similar lobate-outlined perforate test, A. punctulata View in CoL has a large, raised, round umbilical boss, the chambers are flush together with depressed sutures, there are no large interseptal cavaties or bridges spanning them and there is a lack of folia and subsequent extensions seen in all examples of E. punctatus View in CoL . Thus it is unlikely that d’Orbigny (1826) incorrectly assigned A. punctulata View in CoL , but rather the two taxa represent separate species and d’Orbigny’s (1826) illustrations were misinterpreted by Hansen & Rögl (1980).

Most reports of E. punctatus View in CoL are of specimens collected from the Gulf of Aqaba , Red Sea ( Said 1949; Reiss & Hottinger 1984; Hottinger et al. 1993) and specimens discussed by Hansen & Rögl (1980) were collected from Port Louis, Mauritius .

Distribution within study area. Epistomaroides punctatus was collected from all sampled reefs except Sykes Reef. Though common throughout most areas, abundance never exceeded ten specimens per site with average abundance at three specimens per site. Two specimens of E. punctatus were still alive at the time of collection restricted to one specimen from site 53 in One Tree Lagoon 2 and one specimen from the channel sample.

Kingdom

Chromista

Phylum

Foraminifera

Class

Globothalamea

Order

Rotaliida

Family

Anomalinidae

Loc

Epistomaroides Uchio 1952

Mamo, Briony L. 2016
2016
Loc

Epistomaroides punctatus (

Said 1949
1949
Loc

Anomalina ariminensis d’Orbigny 1902 ( Fornasini 1902 )

d'Orbigny 1902 (Fornasini 1902
1902
Loc

Anomalina punctata d’Orbigny 1826

d'Orbigny 1826
1826
Loc

Anomalina punctata d’Orbigny 1826

d'Orbigny 1826
1826
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