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are polygeminate, with between 9 and 14 pairs of pores per plate, arranged in more or less regular arcs, sometimes almost in bands. All ambulacral plates bear a single, large primary tubercle, occupying almost the entire surface of the plate. The interambulacral plates bear a single, massive nipple,
383:
These two species are very close visually, and often difficult to distinguish, since they generally share the same distribution area. The main criteria for in situ identification are the radioles, which are generally longer (especially on the aboral side) and more clearly triangular in
299:
flanked by secondary tubercles on the aboral surface. The radioles are very thick and dense, usually three-faceted (or two or four, or round, mainly in H. mamillatus). They are never modified into scales or plates (unlike
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often has the secondary radioles white or the base of the primary radioles surrounded by a white ring, which never seems to be seen in
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is also usually darker (brown, dark orange...), but the great variability of colorations in this genus makes this criterion delicate.
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The apical disc is dicyclic, with a reduced periproct. The peristome is also reduced and elliptical, with limited mouth notches. The
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has less petalloid aboral ambulacral zones than its sister species, and fewer pore pairs per ambulacral plate (9-12 versus 15-16).
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are brightly colored tropical sea urchins with very thick spines that have given them the nickname "
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245:. This genus appeared in the Miocene and spread throughout the warm Indo-Pacific.
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Indo-Pacific region (from the east coast of Africa to the
Pacific archipelagos),
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The genus consists of sea urchins with rounded (but slightly elliptical)
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at opposite, at the apex of the aboral (upper) face.
457:Radiols (spikes) of a "slate pencil sea urchin" (
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874:Taxa named by Johann Friedrich von Brandt
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463:). They are a classical souvenir.
313:This genus contains two species:
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529:World Register of Marine Species
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241:basin, especially in Reunion or
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41:
237:. They are mainly found in the
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1:
515:Kroh A, Mooi R, eds. (2023).
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817:. You can help Knowledge by
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7:
365:Heterocentrotus trigonarius
10:
895:
796:
460:Heterocentrotus mamillatus
443:Heterocentrotus mamillatus
426:Heterocentrotus mamillatus
339:Heterocentrotus mamillatus
263:Heterocentrotus mamillatus
233:is a genus of the familia
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525:World Echinoidea Database
215:
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119:Scientific classification
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554:Natural History Museum
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809:This article about a
753:Paleobiology Database
491:Paleobiology Database
377:Indo-Pacific region.
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423:Radiols (spikes) of
274:slate pencil urchins
16:Genus of sea urchins
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869:Echinoidea genera
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740:Open Tree of Life
576:Taxon identifiers
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29:Temporal range:
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864:Heterocentrotus
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407:Skeletal-wise,
322:Scientific name
311:
309:List of species
302:Colobocentrotus
276:", named after
270:Heterocentrotus
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230:Heterocentrotus
217:2 species (see
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197:Heterocentrotus
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25:Heterocentrotus
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386:H. trigonarius
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521:Brandt, 1835"
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493:. Fossilworks
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325:Distribution
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819:expanding it
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557:. Retrieved
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550:"Acrocladia"
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532:. Retrieved
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495:. Retrieved
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487:Brandt 1835"
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278:slate pencil
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239:Indo-Pacific
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688:iNaturalist
608:Wikispecies
249:Description
176:Camarodonta
858:Categories
811:sea urchin
559:2022-11-13
534:22 October
497:22 October
469:References
296:ambulacrum
166:Echinoidea
289:periproct
142:Kingdom:
136:Eukaryota
33:โrecent,
593:Wikidata
429:sculpted
404:either.
345:Linnaeus
211:Species
182:Family:
152:Phylum:
146:Animalia
132:Domain:
768:4193306
706:1015335
680:2278865
599:Q508348
373:, 1816)
371:Lamarck
347:, 1758)
192:Genus:
172:Order:
162:Class:
31:Miocene
781:205582
765:uBio:
745:631179
719:656015
243:Hawaii
205:, 1835
203:Brandt
813:is a
776:WoRMS
758:33055
732:31179
701:IRMNG
693:47614
667:61037
654:7P5VB
641:84355
319:Image
815:stub
727:NCBI
714:ITIS
675:GBIF
636:BOLD
536:2023
499:2023
285:test
280:..
258:test
219:text
44:Pre๊
662:EoL
649:CoL
623:AFD
260:of
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38:Ma
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64:D
59:S
54:O
49:๊
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
