Aulocyathus sp.cf. matricidus (Kent, 1871)

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

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

publication LSID

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

persistent identifier

https://treatment.plazi.org/id/C9A595F8-CE71-1444-8CE8-81E82D234E7D

treatment provided by

ZooKeys by Pensoft

scientific name

Aulocyathus sp.cf. matricidus (Kent, 1871)
status

 

Aulocyathus sp.cf. matricidus (Kent, 1871)

Fig. 1I, J View Figure 1

Flabellum matricidum Kent, 1871: 276, pl. 23: fig. 2A-C.

Fragilocyathus conotrochoides Yabe & Eguchi, 1932a: 388, 389, fig. 1. -Yabe and Eguchi 1941 a: 101. - Yabe and Eguchi 1942b: 116, 145. pl. 9: fig. 15. - Eguchi 1965a: 288, 4 figs. - Eguchi and Miyawaki 1975: 57.

Aulocyathus cf. matricidus . - Yabe and Eguchi 1942b: 112, 116.

Aulocyathus matricidus . - Cairns 1999a: 104. -Cairns 1994: 60, pl. 26, figs C-G, pl. 42, figs B-D.

Type locality.

Off Japan, 84 m ( Zibrowius 1980; Cairns 1994).

Type material.

Two syntypes are deposited at the NHM (Cairns 1994).

Material examined.

ORI_DIa1 (2 specimens): no locality data.

Description.

Corallum solitary, attached, and conical to elongate. Calice circular, calicular margin smooth. Largest of two specimens examined (ORI_DIa1) 5.2 × 5.1 mm in CD, and ≤ 15.4 mm in H. Costae wide. Theca and costae granular. Corallum light brown.

Septa hexamerally arranged in four cycles, the last cycle being incomplete, according to the formula: S1 > S2 > S3 > S4 (32 septa). S1-2 most exsert septa. S1 extend almost towards centre of fossa, with vertical to slightly sinuous axial margin. S2 ¼ less wide than S1, also has vertical axial margin, and being granular deeper in fossa. S3-4 progressively less exsert (if at all). S3 dimorphic in size: those half-systems lacking S4 only ½ the width of S2, while those flanked by S4 attain almost the same width of S2. If present, S4 ½ the width of S3. Axial margins of S3-4 dentate. Septal faces finely granular. Fossa deep containing a rudimentary columella.

Distribution.

Regional: Eastern margin of South Africa; depth unknown. Elsewhere: Tsugara Strait; and Japan Sea (Cairns 1994); 84-207 m.

Remarks.

Among all congeners, specimens examined closely resemble Aulocyathus matricidus in having a smooth calicular margin, upper peripheral septa not notched, rudimentary columella, and a slender pedicel. However, A. matricidus is only known from Japan and, therefore, its occurrence in the southwestern Indian Ocean would represent a disjunct distribution.

Kingdom

Animalia

Phylum

Cnidaria

Class

Anthozoa

Order

Scleractinia

Family

Caryophylliidae

Genus

Aulocyathus

Loc

Aulocyathus sp.cf. matricidus (Kent, 1871)

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

Fragilocyathus conotrochoides

Yabe & Eguchi 1932
1932
Loc

Flabellum matricidum

Saville Kent 1871
1871