Rhizopsammia compacta Sheppard & Sheppard, 1991

Filander, Zoleka N., Kitahara, Marcelo V., Cairns, Stephen D., Sink, Kerry J. & Lombard, Amanda T., 2021, Azooxanthellate Scleractinia (Cnidaria, Anthozoa) from South Africa, ZooKeys 1066, pp. 1-198: 1

publication ID

http://dx.doi.org/10.3897/zookeys.1066.69697

publication LSID

lsid:zoobank.org:pub:133CE040-A5AF-44F1-BC9A-558C2F06A8AA

persistent identifier

http://treatment.plazi.org/id/97BCD293-11D1-E102-BDED-648508E9E3DF

treatment provided by

ZooKeys by Pensoft

scientific name

Rhizopsammia compacta Sheppard & Sheppard, 1991
status

 

Rhizopsammia compacta Sheppard & Sheppard, 1991  

Fig. 10K, L View Figure 10

Rhizopsammia compacta   Sheppard & Sheppard, 1991: 153, fig. 179. - Cairns and Keller 1993: 277, fig. 13B, E.

Balanophyllia bairdiana   . - Boshoff 1981: 40.

Balanophyllia ponderosa   . - Boshoff 1981: 41.

Type locality.

Off Musandam, Gulf of Oman; 35 m ( Cairns and Keller 1993).

Type material.

The holotype is lodged at the BMNH (GBIF 2020).

Material examined.

ORI_EIa2 (2 specimens): Eastern margin, 14 km from Durban / 12 km off Mbokodweni Estuary, 29°58'00.00"S, 31°01'59.99"E; 49 m. GoogleMaps   ORI_EIa6 (40 specimens), ORICH_1 (2 specimens): Eastern margin, other locality data unknown. SAMC_A072979 (20 specimens): Southern margin, 21 km off Port Elizabeth / 16 km off Bakens River Estuary, 33°58'59.99"S, 25°46'59.99"E; 90 m. GoogleMaps   SAMC_A073033 (1 specimen): Eastern margin, 28 km south of Ponta Do Ouro / 17 km off Kosi Bay Estuary, 27°06'18.00"S, 32°52'00.12"E; 50 m. GoogleMaps   SAMC_A073041 (1 specimen): 24 km south of Ponta Do Ouro /16 off Kosi Bay Estuary, 27°04'00.00"S, 32°52'59.99"E; 69 m. GoogleMaps   SAMC_A073081 (6 specimens): Eastern margin, 27 km from Richards Bay / 40 km off Mlalazi Estuary, 29°00'24.11"S, 32°12'00.00"E; 152 m. GoogleMaps   SAMC_A073083 (6 specimens): Eastern margin, 28 km from Richards Bay / 40 km off Mlalazi Estuary, 29°00'54.00"S, 32°12'06.12"E; 215 m. GoogleMaps   SAMC_A073136 (1 specimen): Eastern margin, 39 km from Cape Vidal / 29 km off Mgobezeleni Estuary, 27°47'23.99"S, 32°38'53.87"E; 65- 70 m. GoogleMaps   SAMC_A073192 (3 specimens): Eastern margin, 69 km from Cape Vidal / 7 km off Mgobezeleni Estuary, 27°31'48.00"S, 32°42'47.99"E; 70 m. GoogleMaps   SAMC_A073199 (1 specimen, sub-sample of USNM 91800): Eastern margin, 17 km south of Ponta Do Ouro / 11 km off Kosi-Kumpungwini (Sifungwe) Estuary, 27°00'17.99"S, 32°55'18.12"E; 67 m. GoogleMaps   SAMC_A073204 (1 specimen): Eastern margin, 67 km from Cape Vidal / 7 km off Mgobezeleni Estuary, 27°32'48.12"S, 32°42'36.00"E; 68 m. GoogleMaps   SAMC_A073208 (1 specimen): Eastern margin, 16 km from St. Lucia Estuary / 17 km off Mfolozi Estuary, 28°17'30.11"S, 32°32'35.88"E; 50 m. GoogleMaps   SAMC_A073221 (1 specimen): Eastern margin, 68 km from Cape Vidal /5 off Mgobezeleni Estuary, 27°31'59.99"S, 32°42'00.00"E; 77 m. GoogleMaps   SAMC_A090105 (2 specimens): Locality data unknown. SAMC_A090112 (1 specimen): Southern margin, 11 km from Pringle Bay / 8 km off Buffels Oos Estuary, 34°16'29.99"S, 18°49'29.99"E; 14- 17 m. GoogleMaps   SAM_H1373 (5 specimens): Western margin, 14 km from Cape Town / 13 km off Diep Estuary, 33°57'31.20"S, 18°22'20.64"E; depth unknown. SAM_H1375 (1 specimen): Western margin, 14 km from Cape Town / 13 km off Diep Estuary, 33°57'31.20"S, 18°22'20.64"E; 44 m. GoogleMaps   SAM_H1380 (2 specimens): Southern margin, 16 km from Cape Point / 8 km off Elsies Estuary, 34°12'59.05"S, 18°27'57.32"E; 40 m. GoogleMaps   SAM_H1414 (1 specimen): Southern margin, 16 km from Cape Point / 8 km off Elsies Estuary, 34°12'59.05"S, 18°27'57.32"E; depth unknown. SAM_H1686 (6 specimens): Southern margin, 16 km from Cape Point/ 8 km off Elsies Estuary, 34°12'59.05"S, 18°27'57.32"E; depth unknown. SAM_H 2844 (1 specimen): Southern margin, 6 km from Kenton On Sea / 5 km off Boknes Estuary, 33°43'07.59"S, 26°37'37.95"E; 90 m. GoogleMaps   SAM_H4578 (1 specimen): Eastern margin, 6 km south of Ponta Do Ouro / 9 km off Kosi-Kumpungwini (Sifungwe) Estuary, 26°53'30.00"S, 32°55'36.00"E; 51 m. GoogleMaps   SAM_H4579 (2 specimens): Eastern margin, 42 km south of Ponta Do Ouro / 27 km off Kosi Bay Estuary, 27°13'30.00"S, 32°49'30.00"E; 74 m. GoogleMaps   USNM 91807 (2 specimens): Eastern margin, 38 km south of Ponta Do Ouro / 23 km off Kosi Bay Estuary, 27°11'17.99"S, 32°50'14.39"E; 78 m. GoogleMaps  

Description.

Colony irregularly shaped, composed of corallites interconnected by narrow stolons, or composed of small corallites budding from lower edge zone of larger corallites. Corallites ceratoid to cylindrical, bearing elliptical calices (GCD:LCD = 1.4-1.8), calicular margin lanceted. Largest colony examined (ORI_EIa6) consists of 20 corallites. Largest corallite (SAMC_A073041) 20.2 × 13.0 mm in CD, and 33.5 mm in H. If present, epitheca thin. Costae conspicuous throughout corallum, equal in width, covered with fine, pointed, and randomly arranged granules. Intercostal striae thin and deep. Corallum white.

Septa hexamerally arranged in five cycles according to the formula: S1 ≥ S2 > S3 > S5 > S4, with occasional pairs of S6 in half-systems (≤ 112 septa). S1-2 both independent, most exsert, reaching columella with straight and smooth axial margins that become dentate deep in fossa. S3 slightly less to as exsert as S1-2, but having only ½ the width of S1-2, but otherwise similar in profile. Higher cycle septa (S4-5) progressively less exsert, if at all. S41/3 the width of S3, and have the least dentate lower axial margins. S5 ¾ wider than S4, merging towards S4 before joining columella as one septum. S5 axial margins dentate to laciniate. S6, if present, restricted to calicular margin. Septa commonly closely packed, with all septal faces being granular. Pali absent. Fossa of moderate depth, containing a spongy columella that fuses with axial margins of all septa except S4 (and S6 if present).

Distribution.

Regional: Western to eastern margin of South Africa, extending from off Cape Town towards Kosi-Kumpungwini (Sifungwe) Estuary (9 km south of Ponta Do Ouro: Mozambique); 40-215 m. Elsewhere: Gulf of Oman ( Sheppard and Sheppard 1991; Cairns and Keller 1993); Mozambique ( Cairns and Keller 1993); 35-110 m.

Remarks.

Our examined specimens agree with the redescription of Cairns and Keller (1993) of Rhizopsammia compacta   . Although the lack of stolons may cause confusion with Balanophyllia diademata   based on van der Horst’s (1927) description (and associated image), R. compacta   can be distinguished by consistently having five complete septal cycles (occasionally with a pair of S6 = 6:6:12:24:48:16) as compared with five incomplete cycles of B. diademata   (6:6:12:24:34). Rhizopsammia compacta   may be distinguished from the other South African congeners by its relatively large adult corallum (20.0 mm CD), as compared with the medium-sized R. verrilli   van der Horst, 1922 (8.0 mm) and the small R. annae   (6.3 mm). The hexamerally arranged septa in six cycles (≤ 112 septa) may also assist with separating R. compacta   from R. verrilli   and R. annae   , which both have septa hexamerally arranged in four cycles (48 septa).

Kingdom

Animalia

Phylum

Cnidaria

Class

Anthozoa

Order

Scleractinia

Family

Dendrophylliidae

Genus

Rhizopsammia

Loc

Rhizopsammia compacta Sheppard & Sheppard, 1991

Filander, Zoleka N., Kitahara, Marcelo V., Cairns, Stephen D., Sink, Kerry J. & Lombard, Amanda T. 2021
2021
Loc

Rhizopsammia compacta

Sheppard & Sheppard 1991
1991