Sperm characters of the aspidogastrean Rohdella amazonica (Aspidogastridae, Rohdellinae), a parasite of the banded puffer fish Colomesus psittacus
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DOI: 10.1007/s00436-019-06479-4
Abstract: The ultrastructural characteristics of the mature spermatozoon of the aspidogastrean Rohdella amazonica (Aspidogastridae, Rohdellinae) were studied by means of transmission electron microscopy. The sperm cell shows two axonemes of the 9 + ‘1’ trepaxonematan pattern… read more here.
Keywords: amazonica aspidogastridae; aspidogastridae rohdellinae; rohdella amazonica; aspidogastrean rohdella ... See more keywords
Design of a three-dimensional scramjet nozzle considering lateral expansion and geometric constraints
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DOI: 10.1016/j.actaastro.2017.09.033
Abstract: Abstract A new method based on quasi two-dimensional supersonic flow and maximum thrust theory to design a three-dimensional nozzle while considering lateral expansion and geometric constraints is presented in this paper. To generate the configuration… read more here.
Keywords: three dimensional; design three; expansion; considering lateral ... See more keywords
A review of the Barbatula loaches (Teleostei: Nemacheilidae) from north-eastern China, with the description of four new species.
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DOI: 10.11646/zootaxa.4565.1.1
Abstract: The species of the genus Barbatula from north-eastern China are reviewed, based on morphological and molecular characters. A total of ten species are recognized. Barbatula nuda, B. toni, B. gibba, B. potaninorum, B. kirinensis and… read more here.
Keywords: fin origin; lateral expansion; lip; new species ... See more keywords