WoRMS taxon details
original description
Mooi, R.; Noordenburg, H. V. (2021). A new species and comparative morphology of Philippine sea biscuits (Echinoidea: <em>Clypeaster</em>). <em>Zootaxa.</em> 4964(1): 1-36., available online at https://doi.org/10.11646/zootaxa.4964.1.1 page(s): 9-19; figs 3-8, tabs 2-5, 11 [details] Available for editors [request]
Holotype CAS CASIZ 234824, geounit Mactan Island [details]
Paratype CAS CASIZ 187409, geounit Balut Island [details]
Paratype CAS CASIZ 187411, geounit Balut Island [details]
Paratype CAS CASIZ 187450, geounit Balut Island [details]
Paratype CAS CASIZ 234819, geounit Balicasag Island [details]
Paratype CAS CASIZ 234820, geounit Balicasag Island [details]
Paratype CAS CASIZ 234821, geounit Balicasag Island [details]
Paratype CAS CASIZ 234822, geounit Mactan Island [details]
Paratype CAS CASIZ 234823, geounit Mactan Island [details]
Paratype CAS CASIZ 234825, geounit Balicasag Island [details]
Paratype CAS CASIZ 234826, geounit Mactan Island [details]
Paratype CAS CASIZ 234827, geounit Mactan Island [details]
From editor or global species database
Diagnosis Among all known extant taxa, very few Clypeaster species possess completely unique features (i.e. autapomorphies). Therefore, early workers used unique combinations of relatively conspicuous features to diagnose new species, and this is also the approach here. Nevertheless, among the Clypeaster species recorded from the Philippines, Clypeaster brigitteae n. sp. is unique with respect to certain characters, and these are marked with an asterisk in the following list of relevant characters:
Clypeaster with all petals widely open*; fewer than 9 respiratory pore pairs counted within a section 5 mm long along the length of single column in each petal; only 1 or 2 primary tubercles in poriferous zone between adjacent respiratory pore pairs*; interambulacral basicoronals separated from first pair of post-basicoronals by two plates from each adjacent ambulacrum; single occluded distal plate (very rarely two) in petal*; aboral primary tubercles not densely distributed (only about 50/cm2)*; valves of ophicephalous large (largest of trio usually about 400 μm long). [details]
Etymology The new species is named after the late spouse of the second author, Brigitte. [details]
Type material A total of 12 specimens (Table 2), consisting of a holotype (CASIZ 234824, Mactan Island, Cebu, Philippines) and 11 individually cataloged paratypes (CASIZ 187409, 187411, 187450, 234819–234823, 234825–234827, Balicasag Island, Bohol and Balut Island, Mindanao, Philippines), were available for study, obtained in a donation to the California Academy of Sciences by the second author in 2008–2009, or purchased with export permits by the first author through online dealers in the Philippines. [details]
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