{"id":878,"date":"2019-06-25T17:07:35","date_gmt":"2019-06-25T17:07:35","guid":{"rendered":"http:\/\/www.britishlivebearerassociation.co.uk\/site\/?p=878"},"modified":"2022-05-16T06:33:09","modified_gmt":"2022-05-16T06:33:09","slug":"xiphophorus-pygmaeus-hubbs-and-gordon-1943","status":"publish","type":"post","link":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/2019\/06\/25\/xiphophorus-pygmaeus-hubbs-and-gordon-1943\/","title":{"rendered":"Xiphophorus pygmaeus (Hubbs and Gordon 1943)"},"content":{"rendered":"\n

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

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

pygmaeus<\/em>: due to it diminutive size<\/p>\n\n\n\n

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

C.L. Hubbs and M Gordon (1943)<\/p>\n\n\n\n

\u2018Studies of cyprindonont fishes. 19. Xiphophorus pygmaeus<\/em>, new species from\nMexico\u2019 Copeia 1943(1):31-3<\/p>\n\n\n\n

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

Xiphophorus\npygmaeus pygmaeus <\/em>Rosen 1960<\/p>\n\n\n\n

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

Slender\nPygmy Swordtail<\/p>\n\n\n\n

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

Collected by Myron Gordon and Salvador\nCoronado, April 14th<\/sup> 1939<\/p>\n\n\n\n

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

Xiphophorus pygmeaus<\/em> is one of the nine\nnorthern swordtails and belongs to the Pygmaeus clade consisting of consisting of X. pygmaeus<\/em>, X. nigrensis<\/em> and X. multilineatus<\/em>.<\/p>\n\n\n\n

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

 R\u00edo\nAxtla of R\u00edo Panuco system, at Axtla, San Luis Potos\u00ed, Mexico.<\/p>\n\n\n\n

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

Rio Axtla system, Rio Panuco drainage, SLP:\nabundant in Rio Huichihuayan, less common in lower 9 km of Rio Tancuilin and\nupper 5 km of Rio Axtla. <\/p>\n\n\n\n

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

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

Rio Huichihuayan<\/p>\n\n\n\n

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

X. pygmaeus is most commonly found in rivers\nor pools which have dense vegetation with overhanging banks.<\/p>\n\n\n\n

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

Males 25mm – 30mm females 40mm<\/p>\n\n\n\n

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

A very small slender form of swordtail with\na very short sword. There are two male size variations. Ranging from 25mm to\n30mm standard length.<\/p>\n\n\n\n

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

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

A\nsingle bold lateral line runs from the eye. The colouration below the lateral\nline is white with a bluish tint, a pale blue stripe sits above the lateral\nline and the rest of the back is brown with the edges of the scales being\ndarker giving a net like appearance. <\/p>\n\n\n\n

A\nshort sword of generally less than 2mm but never more than 8mm, the sword does\nnot have black edging.<\/p>\n\n\n\n

The dorsal fin in this species is short,\nboth in height and base length,\nthe fin is clear with a faint black edge and faint black band one third of the\nway up the fin.<\/p>\n\n\n\n

As\nwith all of the Pygmaeus clade a yellow form can be found. This Yellow form has\nbeen fixed within the hobby and can easily be acquired.<\/p>\n\n\n\n

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

A\nsingle bold lateral line runs from the eye. The colouration below the lateral\nline is white with a bluish tint, a pale blue stripe sits above the lateral\nline and the rest of the back is brown with the edges of the scales being\ndarker giving a net like appearance. The females show a gravid spot<\/p>\n\n\n\n

The\ndorsal fin is clear with an extremely faint black edge and an extremely faint\nblack band one third of the way up the fin.<\/p>\n\n\n\n

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

A shy species that likes plenty of plant\ncover to feel secure.<\/p>\n\n\n\n

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

A small aquarium well planted with an air\ndriven sponge filter or no filter but regular water changes. Plenty of Java\nmoss should be on the bottom of the aquarium<\/p>\n\n\n\n

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

Broods are born on a monthly cycle and\nnumber about 5 \u2013 10, fry are and normally left alone by the parents.<\/p>\n\n\n\n

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

Middle-American poeciliid\nfishes of the genus Xiphophorus<\/em><\/strong>.<\/p>\n\n\n\n

Bull.\nFla. St. Mus. Biol. Sci 5 (4): p 57-242.                Donn E. Rosen<\/strong><\/p>\n\n\n\n

American Museum Novitates <\/strong>Number 2975, June 27,\n1990.<\/strong><\/p>\n\n\n\n

Monophyly and\nGeography of the Rio P’anuco Basin Swordtails (Genus Xiphophorus) with<\/p>\n\n\n\n

Descriptions of Four\nNew Species                             Rauchenberger, Kallman & Morizot<\/strong><\/p>\n\n\n\n

Platies\nand swordtails                                              Derek\nand Pat Lambert<\/strong><\/p>\n\n\n\n

Fishbase<\/strong><\/p>\n\n\n\n

Wikipedia<\/strong><\/p>\n\n\n\n

\"\"
Photograph courtesy of Dave Macallister<\/strong><\/figcaption><\/figure><\/div>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Etymology: Xiphophorus: Greek, xiphos = sword + Greek, pherein = to carry pygmaeus: due to it diminutive size First description: C.L. Hubbs and M Gordon (1943) \u2018Studies of cyprindonont fishes. 19. Xiphophorus pygmaeus, new species...<\/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-878","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/878","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=878"}],"version-history":[{"count":3,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/878\/revisions"}],"predecessor-version":[{"id":3913,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/posts\/878\/revisions\/3913"}],"wp:attachment":[{"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/media?parent=878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/categories?post=878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.britishlivebearerassociation.co.uk\/site\/wp-json\/wp\/v2\/tags?post=878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}