Orchestina
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publication ID |
https://doi.org/ 10.1206/906.1 |
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DOI |
https://doi.org/10.5281/zenodo.4628193 |
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persistent identifier |
https://treatment.plazi.org/id/03E487E0-3036-214E-2EE3-A064664B78D3 |
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treatment provided by |
Felipe |
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scientific name |
Orchestina |
| status |
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Orchestina View in CoL View at ENA sp. 2 ( Argentina)
SPERM TRANSFER FORM ( fig. 29 View Fig ): Long, tubelike synspermia ( fig. 29A View Fig ), comprising two spermatozoa. The sheath that surrounds the sperm conjugates (,1 Mm) is formed in the deferent ducts ( fig. 29B, C View Fig ) and further condenses during the passage of the sperm conjugates toward the ejaculatory duct. Early sperm conjugates are oval shaped and further compress and elongate within the long deferent ducts. Fused sperm of a sperm conjugate are not coiled ( fig. 29 E View Fig ). Mitochondria are always present within the cytoplasm of the syncytium ( fig. 29E View Fig ).
SPERMATOZOA ( fig. 29 View Fig ): Acrosomal complex: AV small, cylindrical ( fig. 29E View Fig ), and provided with a narrow subacrosomal space. AF originates from the subacrosomal space and extends into the NC ( fig. 29D View Fig ). Nucleus: prcN tubelike ( fig. 29E View Fig ) and provided with a very deep implantation fossa that extends as far as the anterior pole of the nucleus. The implantation fossa is filled with a large amount of an electron-dense centriolar adjunct ( fig. 29 View Fig D–F). peN not developed ( fig. 29F View Fig ). NC located in the periphery of the prcN ( fig. 29D View Fig ). Axoneme: 9+3 microtubular pattern.
NOTES ON SPERMIOGENESIS: Information on spermiogenesis were not obtained due to missing material from the testis.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.