jueli­nae

Parosphromenus jueli­nae

First describ­tion: Novem­ber 2021 - WENT­IAN SHI, SHU­JIE GUO, HARY­ONO HARY­ONO, YIJIANG HONG & WAN­CHANG ZHANG

Zootaxa 5061 (1): 071092

Char­ac­ter­is­tics: Diag­no­sis Parosphromenus juelinae,sp. nov., is dis­tin­guished from other species of the genus by the fol­low­ing unique com­bi­na­tion of char­ac­ters: the inner iri­des­cent band in the unpaired fins is frag­mented into an arc arrange­ment of sev­eral clearly inter­rupted irreg­u­lar blotches (when pre­served, these iri­des­cent blotches become hya­line); the prox­i­mal part of the unpaired fins is black; dorsal-​fin rays XIIIXIV, 57 (total 1821, 19*); anal-​fin rays X – XII, 910 (total 1922, 21*), cau­dal fin rounded with a branched media ray, pelvic fin fil­a­ment light blue; except for the dark brown stripes, the rest of the body is cov­ered through­out by intense red blotches, which extend to the base of the unpaired fins

Sim­i­lar species: The unpaired fin col­oration is sim­i­lar to that of P. deiss­neri, but it dif­fers from the lat­ter in hav­ing a rounded cau­dal fin with a non-​filamentous branched median ray and a smaller anal fin. Although P. jueli­nae has the same cau­dal fin struc­ture as P. bin­tan, it can be dis­tin­guished from the lat­ter by its dis­tinct unpaired fin col­oration and the intense red color on the body flanks.

Occurence/​Distribution: Parosphromenus jueli­nae sp. nov. is restricted to a small area on Bangka Island, Indone­sia, where it occurs in a few for­est peat swamps with lit­tle human interference.

This species is restricted to a few adjoin­ing for­est streams and swamps belong­ing to the same river sys­tem in Bangka, which are not con­nected with the habi­tats of P. bin­tan and P deiss­neri. The habi­tats are well– pre­served and rel­a­tively undis­turbed by human activ­i­ties. The water bod­ies are densely veg­e­tated with aquatic mac– rophytes (mainly Cryp­to­co­ryne banka­nen­sis [Araceae] and Utric­u­laria sp. [Len­tibu­lar­i­aceae]) and shaded by trees and shrubs at the bank; and the water is clear, with high tan­nin lev­els, giv­ing a black-​tea color

Threat: On Bangka Island, nat­ural low­land habi­tats are seri­ously affected by min­ing activ­i­ties, oil-​palm plan­ta­tions, and human set­tle­ment. Dur­ing the field sur­veys on this island from 2016 to 2019, we observed dra­matic habi­tat loss and degra­da­tion of nat­ural land­scapes, and in 2018 we noticed that the edge of the type local­ity had been dis­turbed by agri­cul­tural activ­i­ties. Fol­low­ing the IUCN Red List Cat­e­gories and Cri­te­ria (ver. 3.1), we pro­pose Parosphromenus jueli­nae sp. nov. be listed as Crit­i­cally Endan­gered B2ab (iii), based on its very restricted dis­tri­b­u­tion area in a sin­gle river sys­tem on a sin­gle small island (<50 km2) with less than three known loca­tions; and the fact that this habi­tat has been fac­ing direct threats from human activ­i­ties since 2018. Since there are no sig­nif­i­cant envi­ron­men­tal con­ser­va­tion projects in this area, the sur­vival of this species in the near term is clearly imperilled.

Discovery/​First import: In 1993, col­lected for the first time, but misiden­ti­fied and included into the type series of P. bin­tan. Ever since then, this species was con­sid­ered as P. bin­tan and found by Kishi, Hiroyuki around 2000; later by Horst Linke etc in 2008 also as P. bin­tan. The most recent col­lec­tion before it was rec­og­nized as a new species was in 2012 by Kishi, Lo and Zhou.

In 2017, it was rec­og­nized by Shi etc in their search for P. deiss­neri, that this is a new species.

Trade: This species was also com­mer­cially exported once to Sin­ga­pore by Suma­tra dealer with a false label as P. deiss­neri Bili­ton. This mis­take was pub­lished in 2005 and lead to a mis­sun­der­stand­ing that P. deiss­neri was also dis­trib­uted in Beli­tung island.

Care/​Breeding: Not dif­fer­ent from the usual Paro stan­dard for breed­ing, although early reports indi­cate that breed­ing might be slightly more dif­fi­cult than most species

Behaviour/​Particularities: No par­tic­u­lar­i­ties. Hor­i­zon­tal to head down courtship.

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