{"id":860,"date":"2019-06-20T15:26:26","date_gmt":"2019-06-20T15:26:26","guid":{"rendered":"http:\/\/www.britishlivebearerassociation.co.uk\/site\/?p=860"},"modified":"2022-05-08T12:37:46","modified_gmt":"2022-05-08T12:37:46","slug":"xiphophorus-cortezi-rosen-1960","status":"publish","type":"post","link":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/2019\/06\/20\/xiphophorus-cortezi-rosen-1960\/","title":{"rendered":"Xiphophorus cortezi (Rosen 1960)"},"content":{"rendered":"\n

Etymology:<\/strong><\/p>\n\n\n\n

Xiphophorus:<\/em> Greek, xiphos = sword +\nGreek, pherein = to carry<\/p>\n\n\n\n

cortezi<\/em> after Hernando\nCortes (1485 – 1547) the Spanish conquistador who conquered most of the Aztec\nEmpire between 1519 – 1524.<\/p>\n\n\n\n

First description:<\/strong><\/p>\n\n\n\n

Donn E. Rosen\n1960: <\/strong> Middle-American poeciliid fishes of the\ngenus Xiphophorus<\/em>.<\/p>\n\n\n\n

Bull. Fla. St.\nMus. Biol. Sci 5 (4): p 57-242.<\/p>\n\n\n\n

Synonyms:<\/strong><\/p>\n\n\n\n

Xiphophorus montezumae\ncortezi Rosen, 1960<\/p>\n\n\n\n

Common name:<\/strong><\/p>\n\n\n\n

Cortes\nSwordtail<\/p>\n\n\n\n

Group:<\/strong><\/p>\n\n\n\n

Xiphophorus\ncortezi<\/em>\nis one of nine northern swordtails and belongs to the Cortezi clade consisting\nof consisting of X.\ncortezi, X. birchmanni <\/em>and X.\nmalinche<\/em>.<\/p>\n\n\n\n

History:<\/strong><\/p>\n\n\n\n

Collected by Myron. Gordon, S. Coronad and H. F. Gandy on 14-15th April\n1939. <\/p>\n\n\n\n

Described by Donn E. Rosen 1960 as a subspecies\nof X. montezumae.<\/p>\n\n\n\n

Type Locality:<\/strong><\/p>\n\n\n\n

Arroyo Matlapa at Comoca, 3\u00b72\nkm north of Axtla in the Rio Panuco Basin, state of San Luis Potosi, Mexico. <\/p>\n\n\n\n

Distribution:<\/strong><\/p>\n\n\n\n

Distributed south of the Rio\nTampaon. This sp. has been collected in the Rio Choy, Moctezuma, Axtla, San\nPedro and Candelaria.<\/p>\n\n\n\n

Populations:<\/strong><\/p>\n\n\n\n

Rio Axtla, Vinasco<\/p>\n\n\n\n

Habitat:<\/strong><\/p>\n\n\n\n

Streams with good\ncurrent flowing over rocky bases. Hides under these rocks.<\/p>\n\n\n\n

Derek Lambert\nreported that in the headwaters of the Rio Tancuilin at Rio Verdito (state of Queretaro)\nthe sp. was found in water with a temperature of 13\u00b0C.<\/p>\n\n\n\n

Size:<\/strong><\/p>\n\n\n\n

Male 50mm     Female 50mm.<\/p>\n\n\n\n

Distinguishing\ncharacteristics:<\/strong><\/p>\n\n\n\n

All members of the cortezi clade have a single zigzag\nhorizontal\/lateral stripe which runs from the eye to the caudal peduncle. <\/p>\n\n\n\n

Unlike X. birchmanni <\/em>and X. malinche <\/em>the males do not develop a hump on their foreheads. <\/p>\n\n\n\n

Colour\/Pattern\nVariability:<\/strong><\/p>\n\n\n\n

Males<\/strong><\/p>\n\n\n\n

The colouration of the body above the lateral line is a pale golden brown\nwith the edges of the scales edged in dark brown to black to give a mesh\nappearance, below the lateral line the colour is much paler. A series of narrow\nvertical bars are often visible on their flanks and black melanistic blotches\ncan form to any part of the body to form random patterns. <\/p>\n\n\n\n

The dorsal fin is yellow\nwith black spotting, however the dorsal fin does not\nhave distinct mid dorsal rows of spots found with the other members of the\nclade<\/p>\n\n\n\n

The caudal fin can vary from a pale yellow to bright yellow caudal\nfin without spotting and generally have a caudal blotch which can vary in\nshape. The sword is yellow with a black edge and is distinctly upturned. The\nsword although relatively short for a swordtail is the longest within the\nclade.<\/p>\n\n\n\n

Females<\/strong><\/p>\n\n\n\n

The colouration of the body is similar in females to males. The\nflanks can but rarely show the same narrow vertical barring that appear on\nmales but is not so distinct. Black melanistic blotches can form to any part of\nthe body to form random patterns.<\/p>\n\n\n\n

The\nfins are generally clear but may show a very pale yellow tint.<\/p>\n\n\n\n

Behaviour:<\/strong><\/p>\n\n\n\n

This species shows typical behaviour for swordtails of the\nmontezumae or cortezi groups. The males of these species are generally found\ndarting among and underneath large rocks.<\/p>\n\n\n\n

In the aquarium the cortezi sword is\na peaceful fish and will happily live within a community set up.<\/p>\n\n\n\n

Husbandry:<\/strong><\/p>\n\n\n\n

A Biotope would\nbe a good setting for this fish with a strong current and a rocky substrate,\nwill do well in a planted aquarium in a species set up or community set up.\nThis species is tolerant of a wide temperature, the optimum temperature\nspecified is 22\u00ba C. <\/p>\n\n\n\n

Breeding Notes:<\/strong><\/p>\n\n\n\n

In Derek Lambert\u2019s \u2018platies and Swordtails\u2019 Derek states that brood\nintervals vary, with warmer temperature coupled to longer periods of daylight\nshortening the gestation period.<\/p>\n\n\n\n

Brood sizes\nalso can also vary with the size and age of the female as well as available\nfood supply, generally expect brood sizes to be around 30.<\/p>\n\n\n\n

Remarks:<\/strong><\/p>\n\n\n\n

Two size morphs have been identified according to Lambert in\n‘Platies & Swordtails’ which apparently only becomes evident when raising\nin a mass culture. Under these conditions the smaller morph is 10 mm smaller\nthan the larger morph.<\/p>\n\n\n\n

The three species of the cortezi clade were thought to be\n\u2018allopatric\u2019 this means that these species although closely related evolved in\ngeographically separate areas and therefore could not hybridize.<\/p>\n\n\n\n

There are\nreports that now show areas where the species overlap and in some cases have\nproduced natural hybrid populations.<\/p>\n\n\n\n

References:<\/strong> Donn\nE. Rosen:<\/strong> <\/strong>Middle-American poeciliid\nfishes of the genus Xiphophorus<\/em>.Bull. Fla. St. Mus. Biol. Sci 5\n(4): p 57-242.         <\/strong><\/p>\n\n\n\n

Rauchenberger, Kallman and\nMorizot: <\/strong><\/p>\n\n\n\n

American Museum Novitates Number 2975, June 27, 1990.Monophyly and Geography of the Rio P’anuco Basin Swordtails (Genus Xiphophorus)\nwith Descriptions of Four New Species<\/p>\n\n\n\n

Kallman and Kazianis: <\/strong>Zebrafish. Volume 3, Number 3, 2006 – The Genus Xiphophorus<\/em> in Mexico and Central America                      <\/p>\n\n\n\n

Derek and Pat Lambert<\/strong>: Platies and swordtails                                                                               <\/strong>
<\/p>\n","protected":false},"excerpt":{"rendered":"

Etymology: Xiphophorus: Greek, xiphos = sword + Greek, pherein = to carry cortezi after Hernando Cortes (1485 – 1547) the Spanish conquistador who conquered most of the Aztec Empire between 1519 – 1524. First description:...<\/p>\n","protected":false},"author":59,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-860","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/users\/59"}],"replies":[{"embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/comments?post=860"}],"version-history":[{"count":2,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/860\/revisions"}],"predecessor-version":[{"id":1335,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/860\/revisions\/1335"}],"wp:attachment":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/media?parent=860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/categories?post=860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/tags?post=860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}