Prionospio cf. amarsupiata Neal & Altamira in Paterson, Neal, Altamira, Soto, Smith, Menot, Billett, Cunha, Marchais-Laguionie and Glover 2016
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https://dx.doi.org/10.3897/zookeys.1020.57921 |
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lsid:zoobank.org:pub:CC23B8CE-8C8E-473C-BD8C-44E74252A33D |
persistent identifier |
https://treatment.plazi.org/id/25A56009-5525-5826-9D1C-37BC3070569B |
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scientific name |
Prionospio cf. amarsupiata Neal & Altamira in Paterson, Neal, Altamira, Soto, Smith, Menot, Billett, Cunha, Marchais-Laguionie and Glover 2016 |
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Prionospio cf. amarsupiata Neal & Altamira in Paterson, Neal, Altamira, Soto, Smith, Menot, Billett, Cunha, Marchais-Laguionie and Glover 2016 Fig. 31C View Figure 31
Diagnosis.
Prostomium longer than wide, inverse bottle-shaped, slightly rounded anteriorly, elongated posteriorly into short caruncle extending to the end of chaetiger 1, prostomium without appendages. Eyes absent. Peristomium moderately developed and separated from first chaetiger; with yellow pigment lateral to the caruncle as semi-circular ridges (possibly position of nuchal organs). Branchiae mostly lost but scars of lost branchiae seem apparent on chaetigers 2-4, potentially also chaetigers 5 with branchial scars; branchiae on chaetigers 3 and 4 cirriform, shorter than notopodial lamellae and not fused to it. Interparapodial pouches not observed. Notopodial lamellae on chaetigers 1-5 lanceolate, small on chaetigers 1, afterwards increasing in size until chaetiger 4, smaller again on chaetigers 5, largest usually on chaetigers 3 and 4. Neuropodial lamellae small and rounded on first chaetiger, from chaetiger 2 semi-circular, in hook-bearing chaetigers reduced in size and not well preserved in examined material. Chaetae of three types: capillaries, hooded hooks, sabre chaetae. Anterior chaetae until chaetiger 18-20 all capillaries with thin sheaths, in notopodia arranged in up to three rows, in two rows in neuropodia. From chaetiger 18-20 stout granulated sabre chaetae in inferior position. From chaetigers 19 or 20 capillaries without sheaths, and neuropodial hooks; hooks long-shafted, hooded, stout, with ~ seven apical teeth above main fang, sometimes appearing acicular with distally bent tip. Notopodial hooks not present in examined material (all anterior fragments of fewer than 30 chaetigers).
Remarks.
We refer to our specimens as P. cf. amarsupiata since branchial scars on chaetigers 2-5 seem to be present. Specimens with long branchiae on 2nd and 5th chaetigers, as shown in the original description, could not be found.
Records.
4 specimens. Suppl. material 1: ops. 23, 33, 54, 66 (AM).
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