Rugiloricus undefined-1
| Autor: | Sørensen, Martin V., Herranz, Maria, Grzelak, Katarzyna, Shimabukuro, Mauricio, Kristensen, Reinhardt M., Zeppilli, Daniela |
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| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.5281/zenodo.8160135 |
| Popis: | Rugiloricus sp. 1 Fig. 10B–C Material examined CHILE • 1 Higgins larva; abyssal plain, on the west side of the Atacama Trench; st. 7; 22°56.22ʹ S, 71°37.08ʹ W; depth 5500 m; 20 Mar. 2018; R / V Sonne SO261; deep-sea mud; mounted for LM in Fluoromount G on HS slide; NHMD 1177416 • 1 postlarva containing a developing adult; abyssal plain, on the west side of the Atacama Trench; st. 7; 22°56.22ʹ S, 71°37.08ʹ W; depth 5500 m; 20 Mar. 2018; R / V Sonne SO261; deep-sea mud; mounted for LM in Fluoromount G on HS slide; see also Table 1 and Fig. 1; NHMD 1177417. Short description of Higgins larva and postlarva The Higgins larva (Fig. 10B) is strongly contracted (length =136 µm and width =97 µm). The lorica has longitudinal folds, but the exact number of folds could not be determined. Anterolateral setae are thin and unbranched (length=56 µm); anteroventral setae were not observed. Posterior setae are also thin, flexible and unbranched, with long posterodorsal setae (length=34 µm) and much shorter posterolateral ones (length= 12 µm). Terminal setae are not present. The toes are the most remarkable trait in the larva. Each toe consists of a cylindrical proximal part (length =14 µm) and a gradually tapering distal part (length=21 µm). The toes reach their maximum width in the transition point from cylindrical to tapering, and these medial thickenings give the toes their peculiar appearance (Fig. 10B). The entire cylindrical proximal part and half of the tapering part are hollow, and likely to contain some glandular tissue; the distal tips are compact. Ventrally, the toe bases are supported by plate-like extensions with serrated posterior margins (Fig. 10B inset). The postlarva (Fig. 10C) is made up by a simple cuticle without any visible structures or ornamentation (length =188 µm and width= 118 µm). It contains an adult at a very early developmental stage. The adult trunk is nearly globular (diameter =100 µm) and contains mostly undifferentiated cells. The scalids of the introvert appear more developed and extend into the anterior part of the postlarval cuticle. They are long and slender, with the typical appearance of adult scalids, stressing that the specimen in the postlarval cuticle is not another larval stage. Published as part of Sørensen, Martin V., Herranz, Maria, Grzelak, Katarzyna, Shimabukuro, Mauricio, Kristensen, Reinhardt M. & Zeppilli, Daniela, 2023, Living on the edge - first survey of loriciferans along the Atacama Trench, pp. 162-187 in European Journal of Taxonomy 879 (1) on page 179, DOI: 10.5852/ejt.2023.879.2169, http://zenodo.org/record/8155359 |
| Databáze: | OpenAIRE |
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