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Last Updated: 02 April 2022

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Rhopalophthalmus hastatus Hanamura, Murano & Alias, sp. nov.

Female with basal segment of antennular peduncule about 1. 5 times as long as total length of distal 2 segments, with several setsae on mesial and lateral margins; second segment shortest, with some setae on mesial margins and anterior mesial segment; third segment about 1. 5 times as long as wide; second segment about 1. 5 times as long as long as long; second segment shortened, with several setae on mesial segment with e Antennular peduncle's length is about 5 times longer than the posterior margin of lamella; lamella's thinnest spine is extending just beyond the anterior margin of lamella; distal suture is present; sympod with single stout spine and 1 or 2, usually 3, thin lateral spines; distal margin barely overreaching end of antennular peduncle is present; lateral spine is present; lateral spine with single s The eighth thoracic limb in males is typically curving anteriorly, extending to a marginal end of the basal plate when extended, with a new segment featuring two short setae. Female rudimentary endopod of eighth thoracic limb with incomplete or barely overreaching distal end of basal plate about a third of the base plate, with short seta near base but no one connected or partially defined, with no estimated or incomplete information. However, the new species distinguishes itself from R. egregius' characteristic ornamentation of the antennal sympod by having a single stout spine instead of three graduated spines in R. egregius. The seventh thoracic endopod of the new species, the carpo-propodus, is composed of six or seven articles compared to, most commonly, five in R. egregius. Moreover, the posterior red chromatophore on the telson seems to be smaller than that of R. egregius. Rhopalophthalmus hastatus has a closer resemblance to R. indicus Pillai, 1961. Endopods of the eighth thoracic limbs in both sexes of the new species's sexes are likely to be longer than those in R. indicus. In R. africana, the new species was noticeably shorter than the basal plate, with a bleak white thoracic endopods falling far short of the basal plate in both sexes vs. less than ten setae in both sexes vs. a tenacious telson with a distinctly longer telson with a small thoracic endopods and less than 10 lateral setae vs.

Source link: https://zenodo.org/record/6193430

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions