. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Fig. 10. Astacilla tranquilla Kensley A. Pereopod 1. B. Pereopod 2. minute, with single distal seta. Penis in male elongate, curved, distally bifid. Pleopod 1 in male, basis with three to five retinaculae on medial margin, row of five to fifteen peg-like spines on outer margin, posterior face grooved, distally rounded and variously convoluted, distal margin with several elongate plumose setae; endopod varying in length from being equal in length to exopod, to less than half length and width of exop
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. A Fig. 10. Astacilla tranquilla Kensley A. Pereopod 1. B. Pereopod 2. minute, with single distal seta. Penis in male elongate, curved, distally bifid. Pleopod 1 in male, basis with three to five retinaculae on medial margin, row of five to fifteen peg-like spines on outer margin, posterior face grooved, distally rounded and variously convoluted, distal margin with several elongate plumose setae; endopod varying in length from being equal in length to exopod, to less than half length and width of exopod. Pleopod 2 in male with stout grooved copulatory stylet articulating at base of endopod; apex of copulatory stylet vary- ing from simple gutter-like opening, to bilobed and convoluted. Remarks Nordenstam (1933) separated twelve species under Microarcturus, from an unwieldy group of species variously described as Antarcturus or Arcturus, on the following criteria: antennae shorter than total body length, with flagellum of three articles (rarely two or four); abdomen short, never longer than last four pereonites. Nordenstam (1933: 128) also noted that Microarcturus contained 'small forms'. Hale (1946) noted that at least one species mentioned by Nordenstam under Microarcturus possesses a longitudinally cleft exopod of pleopod 1 in the male,. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
