Aulocyathus sp.cf. matricidus (Kent, 1871)
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 |
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scientific name |
Aulocyathus sp.cf. matricidus (Kent, 1871) |
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Aulocyathus sp.cf. matricidus (Kent, 1871) View in CoL
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.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Aulocyathus sp.cf. matricidus (Kent, 1871)
Filander, Zoleka N., Kitahara, Marcelo V., Cairns, Stephen D., Sink, Kerry J. & Lombard, Amanda T. 2021 |
Fragilocyathus conotrochoides
Yabe & Eguchi 1932 |
Flabellum matricidum
Saville Kent 1871 |