N killifish

Austrolebias nachtigalli

Austrolebias nubium

NDI

Aphyosemion ndianum

Nigeria

Nsan

Obudu

S Nigeria

holotype

NED

Fundulus nevadensis

(Extinct)

NEI

Simpsonichthys neilseni

Pirapora B 2-6

NEU

Nothobranchius neumanni

FHB TZ 172009 Kintinku

Lusilile TAN 17-01

NGA

Plataplochilus ngaensis

Mondah

aff Les Saras DRC

NGC

Simpsonichthys nigromaculatus

NGF

Austrolebias nigrofasciatus

SEC 3-17

"Shopping Pelotas"

Jaguarao

Jaguarao River Floodplains

NGL

Lacustricola nigrolateralis

NGP

Austrolebias nigripinnis

ARG-APKP11-04

Arroyo Tajamar

Buenos Aries

Camelo

Campo de Mayo

Ceibas

Gualegaychu

Ibsquisito

Maschwitz

Molino

Paysandu

Rio Guavirravi

Sagastome

San Javier

UYR 11-1

albino

Nancay

NIC

Epiplatys chevalieri nigricans

HZ85-26

HZ85-6

HZ86-10

HZ86-12

Kouyou

Louay

Moke

NIF

Scriptaphyosemion nigrifluvi

NIG

Fundulopanchax gardneri nigerianus

P82

Weh

Abakaliki

Akwen

BLLMC 2005

Abuja

Akampa

Albino

Biassa

Lokoja

Innidere

Jos Plateau

Makurdi

Misaje

Ugep

NIK

Nothobranchius nikiforovi

blue

red

NIO

Austrolebias nioni

female

NIU

Austrolebias nonoiuliensis

NJA

Epiplatys njalaensis

Freetown Penninsula

Kindia Region GN 2023-02

NLL

Cyprinodon nichollsi

Laguna Oviedo

NMB

Rhexipanchax nimbaensis

NMS

Rivulus nigromarginatus

Description

NOR

Poropanchax normani

Mecca

fry

Baby fish!

NOT

Hypsolebias notatus

Alvorado do Norte

Nova Roma

NPT

Rivulus nigropunctatus

Described in Zootaxa 4236 (1)

NTB

Cynopoecilus notabilis

NTD

Lacustricola nitidus

Nasondoye

NTI

Fundulus nottii

Shoal River

NTO

Procatopus nototaenia

Bidou

Cameroon 2006 2007

Edea

Fifinda

Kribi

Lobe

Okitpupa

Ybassi

NTS

Fundulus notatus

NUB

Nothobranchius nubaensis

Maada Mulaha

NUC

Pachypanchax nuchimaculatus

From Paul Loiselle's review of Pachypanchx: Guichenot (1866) described Poecilia nuchimaculata from a single specimen collected by J. P. Goudot, a French resident of Madagascar from 1835 until his death in the early 1860's. The specimen lacks precise locality data and as Goudot�s journals were lost when he disappeared while in the field (Dorr, 1997), subsequent efforts to determine its provenance have proved fruitless. Published data (Huber, 1998) indicate that with regard to both morphometric and meristic characters the type falls within the range that defines the Malagasy representatives of the genus Pachypanchax. He noted that the prefrontal scales of this specimen are smaller than those of other Pachypanchax species, while the lateralis system consists of open rather than enclosed pores. The caudal squamation is rather light, with scales present only on the basal third of the fin (de Soutter, pers. com.), a feature shared with only one other Malagasy congener. Radiographic examination of the caudal skeleton confirms Huber�s observation that a shallow notch separates the upper plate, formed by the fusion of third, fourth and fifth hypural bones and the lower plate, formed by the fusion of the first and second bones. This condition is more reminiscent of ZOOTAXA that found in many representatives of the Nothobranchidae (upper and lower plates separated by a deep groove), than that seen in Aplocheilus (hypural skeleton made up of three independent elements, the upper- and lowermost comprising the fused fourth and fifth and first and second hypural bones respectively).

In the absence of additional material of P. nuchimaculatus, there is no way to determine whether the observed anomalies in squamation and caudal skeleton of the type specimen are idiosyncratic or reflect significant population-level differences. Pending the acquisition of additional material of this species, it seems advisable to follow Parenti (1981) and provisionally assign Poecilia nuchimaculata to the genus Pachypanchax