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11 results for “Arbacioida”
Supporting Data - Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
<p>This dataset contains the accession numbers and links of the sequences of the specimens analyzed by this work, other sequences used for the analyses can be found in the original article. The species from which the sequences were extracted are: Tetrapygus niger Molina, 1782; Arbacia dufresnii Blainville, 1825; Arbacia spatuligera Valenciennes, 1846 and Coelopleurus floridanus A. Agassiz, 1872. The accession numbers for the Cytochrome Oxidase subunit I (COI) and 28S of the nuclear genome are presented separately.</p><p>In addition, the morphological data of Tetrapygus niger (Test diameter, test height and peristome diameter) presented in this study are shown, as well as their collectors, corresponding collection, country and locality.</p>
FIGURE 5. A–G in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 5. A–G, SEM photographs of pedicellariae and stalk of Arbacia nigra; A, aboral ophicephalous pedicellaria; B, oral ophicephalous pedicellaria; C, triphyllous pedicellaria; D, tridactylous pedicellaria; E, distal end of ophicephalous pedicellaria stalk; F–G, maginifications; F, aboral ophicephalous pedicellaria; G, tridentate pedicellaria. Scale bars: A–E, 100 µm; F–G: scale bars equal 50 µm.
FIGURE 3 in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 3. Denuded test of Arbacia nigra from Las Cruces (A–F; Chile) and Concepción (G; Chile). A–B, specimen TN_ 35LC: A, aboral view; B, oral view. C–F, specimen TN_9LC; C, aboral view; D, oral view; E–F, lateral views; G, apical system of specimen TN_2CO. Scale bars equal 10 mm.
FIGURE 2. Relationships among some Arbaciidae. A in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 2. Relationships among some Arbaciidae. A, BI (Bayesian Inference) tree of COI sequences; B, BI tree of 28S sequences. Values under each node respectively correspond to BI posterior probabilities below 1.
FIGURE 1. A–B in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 1. A–B, Tetrapygus niger; C–D, Arbacia spatuligera; E–F, Arbacia dufresnii; G, Distribution of studied Arbaciidae and sampling sites. Scale bar equals 10 mm.
FIGURE 6 in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 6. Spines of Arbacia nigra specimen TN_36PA; A–B, adapical spine; A, lateral view; B, adoral view; C–E, oral spine; C, complete oral spine; D, zoom on the proximal part; E, zoom on the distal part. Scale bars equal 500 µm.
FIGURE 4 in Taxonomic reassessment of Tetrapygus niger (Arbacioida, Echinoidea): molecular and morphological evidence support its placement in Arbacia
FIGURE 4. Arbacia nigra, details of test plating. A–B, apical system: A, small specimen (TD = 28 mm); B, large specimen (TD = 70 mm); C, aboral plates of ambulacrum; D–E, aboral plates of interambulacrum: D, small specimen (TD = 29 mm); E, large specimen (TD = 70 mm). Scale bars equal 10 mm.
FIGURE 3. A in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 3. A. ballenensis sp. nov. A–B, paratypes in CASG 91189, specimen 21; A, aboral view; B, oral view; C, CASG 91189, specimen 20 in aboral view; D, paratype CASG 91189, specimen 24 in aboral view; E–F, CASG 91189, specimen 04; E, oral view; F, apical system; G, CASG 91189, specimen 03, perignathic girdle showing auricles. Scale bars equal 10 mm.
FIGURE 1 in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 1. Type locality, area and stratigraphy of Arbacia ballenensis sp. nov. A, locations of fossiliferous exposures Angel de la Guarda (AG), Carmen (CA), Cerralvo (CE). B, fossiliferous localities along Bahía San Rafael with location (star) of type locality for Arbacia ballenensis sp. nov. C, stratigraphic column representing seaward-dipping beds of late Pliocene—Early Pleistocene Punta Ballena fan deposits (modified from Johnson et al. 2017) with position of Arbacia ballenensis sp. nov. indicated by image of holotype.
FIGURE 4 in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 4. Spines attributed to A. ballenensis sp. nov. A–B, CASG 59779; C, spine found inside the peristome of CASG 91189, specimen 08. A–B, scale bars equal 2 mm. C, scale bar equals 1 cm.
FIGURE 2. A in Arbacia ballenensis sp. nov. (Echinoidea, Arbacioida): A new species reveals diversification of the genus in Central America
FIGURE 2. A. ballenensis sp. nov. A–D, holotype CASG 103360; A, aboral view; B, oral view; C, lateral view; D, details (magnified) of ambulacrum and interambulacrum on the aboral side. Scale bar equals 10 mm.
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