[Ichthyology • 2020] Parascolopsis akatamae • A New Species of Dwarf Monocle Bream (Perciformes: Nemipteridae) from the Indo-West Pacific, with Redescription of closely related Species P. eriomma

[A] Parascolopsis akatamae n. sp. Miyamoto, McMahan & Kaneko, 2020 
[B] P. eriomma (Jordan & Richardson, 1909)  

DOI: 10.11646/zootaxa.4881.1.6

Abstract

A new species of dwarf monocle bream, Parascolopsis akatamae n. sp., is described from the Indo-West Pacific. The new species is distinguished from all other species of Parascolopsis in having 16–19 gill rakers on the first arch, length of forked part of caudal fin 5.8–6.5 times in standard length, eye diameter 1.3–1.8 times in length of the longest dorsal-fin spine, and a pale yellow stripe present from lower edge of the eye to posterior edge of the preopercle. Parascolopsis eriomma (Jordan & Richardson, 1909) is morphologically very similar to the new species and the two have been confused with each other for a long time. Therefore, we redescribe P. eriomma based on the holotype and newly collected specimens. In addition, we found that patterns of biofluorescence emission for both species are clearly different. This suggests that their biofluorescence patterns may function in distinguishing each other.

Keywords: Pisces, Actinopterygii, Taxonomy, biofluorescence

Parascolopsis akatamae n. sp. (A) and P. eriomma (B–C).
 A) fresh specimen, OCF-P4098, holotype, 160.5 mm SL, Okinawa-jima Island, Japan;
B) fresh specimen, OCF-P4097, 154.4 mm SL, Okinawa-jima Island, Japan;
C) preserved specimen, FMNH 52247, holotype, 190.9 mm SL, Kaohsiung, Taiwan.

Fresh specimens of Parascolopsis akatamae n. sp. (A–D) and P. eriomma (E–F) at different growth stages.
 A) OCF-P4119, 98.3 mm SL, Okinawa-jima Island, Japan; B) OCF-P4071, 140.1 mm SL, Okinawa-jima Island, Japan; C) OCF-P4123, 179.7 mm SL, Okinawa-jima Island, Japan; D) OCF-P4089, 252.7 mm SL, Ishigaki-jima Island, Japan;
E) OCF-P4212, 139.6 mm SL, Okinawa-jima Island, Japan; F) OCF-P3889, 172.8 mm SL, Okinawa-jima Island, Japan.

Parascolopsis akatamae n. sp.

[English name: Rosy dwarf monocle bream; 

Standard Japanese name: Aka-tamagashira]

Diagnosis. Distinguished from congeners by the following combination of characters: gill rakers on first arch 16–19; caudal fin lightly forked, length of forked part of caudal fin 5.8–6.5 times in SL (Figs. 1A, 2A–D, 3A); eye diameter 1.3–1.8 times in length of longest dorsal-fin spine (Fig. 3B); pale yellow stripe present from lower edge of the eye to posterior edge of the preopercle (Figs. 1A, 2A–D); strong biofluorescence emission observed on isthmus and branchiostegal membrane (Fig. 4A–C) (see paragraph of biofluorescence emission patterns).

Etymology. Parascolopsis akatamae n. sp. has long been confused with P. eriomma. P. akatamae is more widely distributed than P. eriomma (Fig. 5), and more common at least in Japan and Taiwan (Hung et al. 2016; this study). Therefore, the English name “Rosy dwarf monocle bream” and Japanese name “Aka-tamagashira” previously used for P. eriomma more appropriately applies to the new species to avoid unnecessary confusion. The specific epithet “akatamae” is derived from the local name in Japan of the type locality.

Parascolopsis eriomma (Jordan & Richardson, 1909)

[New English name: Swallowtail dwarf monocle bream; 

New standard Japanese name: Ennbi-aka-tamagashira]

Etymology. Previously, the English name “Rosy dwarf monocle bream” and Japanese name “Aka-tamagashi-ra” were used for P. eriomma. However, this study revealed that previously recognized P. eriomma included P. akatamae n. sp. This species is more narrowly distributed than P. akatamae (Fig. 5) and very rare at least in Japan and Taiwan (Hung et al. 2016; this study). Therefore, the English name “Rosy dwarf monocle bream” and Japanese name “Aka-tamagashira,” which were previously used for P. eriomma, were applied to P. akatamae, and a new English name, “Swallowtail dwarf monocle bream” and new standard Japanese name, “Ennbi-aka-tamagashira” have been applied to this P. eriomma. The Japanese “Ennbi” means tail of swallow and is derived from shape of the caudal fin of the species.

Biofluorescence emission patterns of Parascolopsis akatamae n. sp. (A–C, OCF-P4098, holotype, 160.5 mm SL) and P. eriomma (D–F, OCF-P4097, 154.4 mm SL).
A,D) lateral view, under white light; B,E) lateral view, under blue light; C,F) ventral view, under blue light. 

 

 Kei Miyamoto, Caleb D. McMahan and Atsushi Kaneko. 2020. Parascolopsis akatamae, A New Species of Dwarf Monocle Bream (Perciformes: Nemipteridae) from the Indo-West Pacific, with Redescription of closely related Species P. eriomma. Zootaxa. 4881(1); 91–103. DOI: 10.11646/zootaxa.4881.1.6

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[Ichthyology • 2023] Badis limaakumi • A New Species of badid fish (Percomorpha: Badidae) from Nagaland, Northeast India

Badis limaakumi  Praveenraj, 2023

  DOI: 10.11646/zootaxa.5351.3.5

 

Abstract

Badis limaakumi, a new species of Badis from Nagaland, Northeast India is distinguished from all its congeners by the following combination of characters: a large (>60 mm SL) and slender body (23.2–28.0% of SL), presence of an opercular blotch at the base of the opercular spine, absence of blotches on the sides and fins, as well as on the cleithrum, and greater number of lateral-line scales.

Keywords: Pisces, new species, Badis assamensis, Badis blosyrus, Milak River, Brahmaputra

Jayasimhan Praveenraj. 2023. Badis limaakumi, A New Species of badid fish from Nagaland, Northeast India (Teleostei: Percomorpha: Badidae).  Zootaxa. 5351(3); 371-379. DOI: 10.11646/zootaxa.5351.3.5

[Ichthyology • 2021] Badis kaladanensis • A New Fish Species (Teleostei: Badidae) from Mizoram, northeast India

 Badis kaladanensis

Ramliana, Lalronunga & Singh, 2021

DOI: 10.1371/journal.pone.0246466

Abstract

Badis kaladanensis, a new percoid fish is described from the Kaladan basin of Mizoram, northeast India. It belongs to the Badis badis species group but can be easily distinguished from its congeners, except from B. kanabos and B. tuivaiei, in having a dark blotch on the dorsal fin between the base of 3rd to 5th spines. It is further distinguished from B. kanabos in having more scales in lateral row (27–30 vs. 25–26), more circumpeduncular scale rows (18–20 vs. 16–17) and smaller eye (7.5–8.9% SL vs. 9.5–12.7); and from B. tuivaiei in having fewer vertebrae (28–29 vs. 30–31) and more rakers on the first gill arch (9 vs. 6–8). The analysis of the mitochondrial DNA (coi and cytb) revealed the distinctness of B. kaladanensis from all other Badis species with the interspecific distance ranges from 5.4–20.4%. (coi) and 5.1–26.3% (cytb).

Fig 3. Badis kaladanensis
a) holotype, ZSI FF 5404, 48.6 mm SL;
b) Paratype, PUCMF 15002, 45.2 mm SL.

Fig 4. Live individual of Badis kaladanensis. PUCMF 15001, 44.8 mm SL.  

Badis kaladanensis sp. nov.

Diagnosis: Badis kaladanensis is distinguished from its congeners in having the following combination of characters: a post nuchal hump, a conspicuous dark blotch covering superficial part of cleithrum above pectoral-fin base, a dark anterior dorsal-fin blotch between 3rd to 5th spines (consistently present in live and preserved specimens), 27–30 scales in lateral row, 18–20 circumpeduncular scale rows, 28–29 vertebrae, 9 rakers on the first gill arch and lacking a dark blotch on the dorsolateral aspect of caudal peduncle.

Etymology. The species is named after the River drainage, the Kaladan River. An adjective.

Fig 5. Type locality of Badis kaladanensis (Palak River, Mizoram, India).

Distribution and habitat. Known from the Palak River (Fig 5) and Sala River, a tributary of the Kaladan basin, in the vicinity of Phurra village and Lungpuk village respectively in Siaha District of Mizoram, India (Fig 6). It is found associated with Olyra saginata, Pethia expletiforis, Rasbora rasbora and R. daniconius.

Lal Ramliana, Samuel Lalronunga and Mahender Singh. 2021. Badis kaladanensis, A New Fish Species (Teleostei: Badidae) from Mizoram, northeast India.  PLoS ONE 16(7): e0246466. DOI: 10.1371/journal.pone.0246466

[Ichthyology • 2018] Dario neela • A New Species of Badid Fish (Percomorpha: Badidae) from the Western Ghats of India

Dario neela

Britz, Anoop & Dahanukar, 2018

   DOI:  10.11646/zootaxa.4429.1.6 

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Abstract

Dario neela, is described from a small tributary stream of the Kabini River in northern Kerala, India. It can be distinguished from congeners by the male colouration in life, which shows wide rims of iridescent blue in all median fins and the pelvic fin. It is further distinguished from all species of Dario, except D. urops by the number of abdominal vertebrae (14 vs. 11–13), and from all Dario species except D. urops and D. huli by the presence of a conspicuous black blotch on the caudal-fin base. Dario neela is distinguished from D. urops by the absence of the horizontal suborbital stripe and presence of a series of up to eight black bars on the body; and from D. huli by 27–28 vertebrae and 27 scales in a lateral row and the absence of teeth from hypobranchial 3. Dario neela is genetically divergent from both Western Ghats congeners in the mitochondrial CO1 gene, showing an uncorrected p-distance of 5.9% with D. urops and 13.1% to D. huli.

 Keywords: Pisces, taxonomy, freshwater fishes, Western Ghats–Sri Lanka biodiversity hotspot

FIGURE 2. Dario neela; India: Kerala;  holotype, male [BNHS FWF 612], 31.2 mm SL, slightly oblique lateral view. 

Dario neela, new species

Etymology. The species name neela is derived from the Malayalam word mnoe, ‘Nīla’, for blue and alludes to the striking iridescent blue colour of males. A noun in apposition.

....

Ralf Britz, V. K. Anoop and Neelesh Dahanukar. 2018. Dario neela, A New Species of Badid Fish from the Western Ghats of India (Teleostei: Percomorpha: Badidae). Zootaxa. 4429(1); 141–148.  DOI:  10.11646/zootaxa.4429.1.6

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