Showing posts with label Callionymidae. Show all posts
Showing posts with label Callionymidae. Show all posts

Friday, January 6, 2023

[Ichthyology • 2022] Synchiropus flavistrigatus • A New Species of Dragonet (Teleostei: Callionymidae) from the tropical eastern Atlantic


 Synchiropus flavistrigatus
Fricke, Ordines & Ramírez-Amaro, 2022
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 Abstract
A new species of dragonet, Synchiropus flavistrigatus sp. n. from the eastern tropical Atlantic, is described on the basis of 15 specimens. The new species is characterised within the subgenus Yerutius Whitley, 1931 by having 8 rays in the second dorsal fin (the last divided at its base), 8 anal-fin rays (the last divided at its base), 20–21 pectoral-fin rays, a single upper unbranched pectoral-fin ray, 1–2 curved dorsal points on the upper margin of the preopercular spine (additional to the main tip), length of first spine of first dorsal fin in male 12.8–15.9% of standard length, in female 14.5–15.4%; caudal-fin length in male 27.7–32.2% of standard length, in female 25.5–27.9%; length of last ray of second dorsal fin in male 18.2–21.6% of standard length; length of last ray of anal fin in male 14.6–17.1% of standard length, in female 13.5–15.1%; second dorsal fin and caudal fin with oblique yellow bars in both sexes; anal fin with a distal dark streak in both sexes. We also provide molecular information, based on two mitochondrial fragments (COI and 12s rRNA), that clearly supports the morphological results confirming that S. flavistrigatus sp. n. corresponds to a new species, distinct from S. phaeton (Günther, 1861). The new species is compared with other species of the subgenus.

KEYWORDS: distribution, dragonets, fishes, Guinea-Bissau, new species



Synchiropus flavistrigatus sp. n.
Guinea dragonet

Diagnosis: A species of the subgenus Synchiropus (Yerutius) with 8 rays in the second dorsal fin, the last divided at its base, 8 anal-fin rays (the last divided at its base), 20–21 pectoral-fin rays, a single upper unbranched pectoral-fin ray, 1–2 curved dorsal points on the upper margin of the preopercular spine (additional to the main tip), length of first spine of first dorsal fin in male 12.8–15.9% of standard length, in female 14.5–15.4%; caudal-fin length in male 27.7–32.2% of standard length, in female 25.5–27.9%; length of last ray of second dorsal fin in male 18.2–21.6% of standard length; length of last ray of anal fin in male 14.6–17.1% of standard length, in female 13.5–15.1%; second dorsal fin and caudal fin with oblique yellow bars in both sexes; anal fin with a distal dark streak in both sexes.

Distribution: The species is only from the tropical eastern Atlantic, distributed off the coast of West Africa between Guinea-Bissau and Angola (Fig. 3). It was collected at depths of 104–386 m.

Etymology: Flavus (Latin) means yellow; strigatus (Latin) means striped. The name of this species refers to the yellow bars on the second dorsal fin. The name is an adjective in the male form when in the male genus Synchiropus.


Ronald Fricke, Francesc Ordines and Sergio Ramírez-Amaro. 2022. Synchiropus flavistrigatus, A New Species of Dragonet from the tropical eastern Atlantic (Teleostei: Callionymidae). Integrative Systematics: Stuttgart Contributions to Natural History. 5(2); 87-101. DOI:  10.18476/2022.874590 

Eine neue Leierfischart, Synchiropus flavistrigatus sp. n. aus dem tropischen Ostatlantik, wird anhand von 15 Exemplaren beschrieben. Die neue wird innerhalb der Untergattung Yerutius Whitley, 1931 durch folgende Merkmale charakterisiert: 8 Strahlen in der zweiten Rückenflosse (der letzte an der Basis geteilt), 8 Strahlen in der Afterflosse (der letzte an der Basis geteilt), 20–21 Brustflossenstrahlen, ein einziger Brustflossenstrahl oben unverzweigt, 1–2 gebogene Spitzen auf der dorsalen Seite des Präoperkulardorns (zusätzlich zur Hauptspitze), Länge des ersten Strahls der ersten Rückenflosse beim Männchen 12.8–15.9% der Standardlänge, beim Weibchen 14.5–15.4%; Schwanzflossenlänge beim Männchen 27.7–32.2% der Standardlänge, beim Weibchen 25.5–27.9%; Länge des letzten Strahls der zweiten Rückenflosse beim Männchen 18.2–21.6% der Standardlänge; Länge des letzten Strahls der Afterflosse beim Männchen 14.6–17.1% der Standardlänge, beim Weibchen 13.5–15.1%; zweite Rückenflosse und Schwanzflosse bei beiden Geschlechtern mit gelben Schrägstreifen; Afterflosse bei beiden Geschlechtern distal mit einem dunklen Streifen. Eine molekulare Untersuchung basierend auf zwei mitochondrialen Fragmenten (COI und 12s rRNA) unterstützt die morphologischen Befunde und bestätigt, daß es sich bei S. flavistrigatus sp. n. um eine neue Art handelt, die sich von S. phaeton (Günther, 1861) deutlich unterscheidet. Die neue Art wird mit anderen Arten der Untergattung verglichen.

Monday, October 3, 2016

[Ichthyology • 2016] Synchiropus sycorax • A New Species of Dragonet (Teleostei: Callionymidae) from the Philippines


Synchiropus sycorax 
Tea & Gill, 2016   

Abstract

Synchiropus sycorax n. sp. is described from six specimens (22.6–40.1 mm SL) collected from Jolo Island, Sulu Archipelago, Philippines. It appears to be most closely related to S. tudorjonesi, which ranges from the Maldive Islands through Indonesia and the Philippine Islands to southern Japan. The new species differs from S. tudorjonesi and other congeners in live coloration: head and body bright red, bright yellow ventrally, with prominent white spots on head (one spot or blotch over preopercular spine, two elongate spots behind middle of eye, and one spot behind upper part of eye at about 1 o’clock position) and body (in three rows, an uppermost row beginning below soft dorsal, tracking lateral line to caudal peduncle, a lowermost row extending from above anterior anal fin to caudal peduncle, and a middle row extending obliquely from above pectoral fin to anterior part of lowermost series of spots); males with pelvic fin and pelvic-pectoral membrane bright yellow with broad bluish or greenish grey to black submarginal band across distal third of fin.

Keywords: Pisces, Ichthyology; taxonomy; Jolo Island, Sulu Archipelago


FIGURE 3. Synchiropus sycorax, female, aquarium specimen from Jolo Island, Philippines. Specimen not retained; approximately 20 mm SL (Y.K. Tea). 

FIGURE 2. Synchiropus sycorax, male paratype in an aquarium, ZRC 54776, 40.1 mm SL, Jolo Island, Sulu Archipelago, Philippines (Y.K. Tea). 

Synchiropus sycorax n. sp.
Ruby Dragonet 

Holotype. AMS I.47200-001, 39.4 mm SL male, Philippines, Sulu Archipelago, Jolo Island, B. Pagkaliwagan, 29 November 2015.
Paratypes. AMS I.47200-002, 26.7 mm SL female; CAS 241566 , 34.8 mm SL male; USNM 438956, 35.5 mm SL male; ZRC 54776, 22.6 mm SL female, 40.1 mm SL male (all collected with the holotype). 

Diagnosis.Synchiropus sycorax differs from congeners in the following live coloration details: head and body bright red, bright yellow ventrally, with prominent white spots on head (one spot or blotch over preopercular spine, two elongate spots behind middle of eye, and one spot behind upper part of eye at about 1 o’clock position) and body (in three rows, an uppermost row beginning below soft dorsal, tracking lateral line to caudal peduncle, a lowermost row extending from above anterior anal fin to caudal peduncle, and a middle row extending obliquely from above pectoral fin to anterior part of lowermost series of spots); males with pelvic fin and pelvic-pectoral membrane bright yellow with broad bluish or greenish grey to black submarginal band across distal third of fin


Distribution and habitat. Synchiropus sycorax is currently known only from Jolo Island, Sulu Archipelago, Philippines (Figure 5). According to B. Shutman (pers. comm.) it occurs at depths of 20–38m in areas of broken coral rubble interspersed with outcrops of soft and stony corals. 

Etymology. The species is named after the red-robed and caped Sycorax warriors from the BBC sci-fi series Dr. Who, in showing similarities in both coloration and grandiloquence of their garb. The epithet sycorax is a noun in apposition.

 FIGURE 6. Synchiropus tudorjonesi, male aquarium specimen, collected from Bali, Indonesia. Specimen not retained; approximately 50 mm SL (Y.K. Tea).  

Tea, Yi-Kai and Anthony C. Gill. 2016. Synchiropus sycorax, A New Species of Dragonet from the Philippines (Teleostei: Callionymidae).
Zootaxa. 4173(1); 85–93.  DOI: 10.11646/zootaxa.4173.1.8