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Parmaturus nigripalatum n. sp., a new species of deep-sea catshark (Chondrichthyes: Carcharhiniformes: Scyliorhinidae) from Indonesia
Abstract
Parmaturus nigripalatum, a new species of catshark of the genus Parmaturus is described from a single specimen collected from a deep-water shark longliner operating in south Sumbawa waters, Indonesia. This new species is distinguished from its closest geographic congener P. lanatus by having prominent enlarged caudal crests, well-developed labial furrows with the uppers and lowers of equal lengths, mouth roof blackish with dark pores, first dorsal fin origin more posteriorly positioned on body trunk, and much lower tooth counts than all other known Parmaturus species. This is the second Parmaturus species recorded from Indonesian waters.
... A small bristle shark with the following combination of adult characteristics ( Figure 20): preanal length, 62.2% TL; pre-first dorsal length, 53.8% TL; prenarial length moderately long, 4.7% TL; head moderately depressed, its height 0.7 times its width; mouth moderately wide, its width 9.0% TL; labial furrows subequal in length, 1.9% TL; anal fin moderately large, its base 10.7% TL; posterior margin 5.4% TL; pectoral-pelvic space, 27.2% TL; body medium brown above, paler below; demarcation between darker dorsal and paler ventral colouration on ventrolateral surfaces diffuse and barely distinct on body; fins with dark posterior margins, most evident on ventral surface of paired fins; teeth in 52 files in upper jaw and 48 lower jaw; monospondylous centra, 42; precaudal centra, 90; total centra, 130. See [26]. ...
... See [26]. ...
... Dichichthys nigripalatum was described from a single specimen from off the coast of Sumbawa in Indonesia [26]. The shallow depth of this specimen seems questionable. ...
The genus Dichichthys was resurrected for five species previously allocated to the genus Parmaturus in the family Pentanchidae. Supraorbital crests on the chondrocranium distinguish Dichichthys from Parmaturus and other members of the family Pentanchidae. A new family, Dichichthyidae, has been proposed to contain Dichichthys. The sequence of the NADH2 mitochondrial gene confirms the placement of Dichichthys outside of the Pentanchidae family, as well as separate from the Atelomycteridae and Scyliorhinidae families. Dichichthys albimarginatus was described using a holotype collected off the coast of New Caledonia. A second juvenile specimen collected off the coast of Papua New Guinea was tentatively assigned as D. cf. albimarginatus. Dichichthys bigus is known from the holotype collected in the Coral Sea off the coast of Queensland, Australia. A new, parasite-afflicted underwater observation was reported further north of Queensland. The type species Dichichthys melanobranchus, previously only known from juvenile specimens, was redescribed based on adult specimens. Dichichthys nigripalatum is known from the holotype collected off Sumbawa, Indonesia, and a tentatively identified photo record from West Java. Dichichthys satoi n. sp. is described from the West Norfolk Ridge and off the North Island of New Zealand. Members of the genus Dichichthys have unique curved egg cases which have pliable ridges made up of numerous fibres and long coiled tendrils on the posterior end.
... T HE genus Parmaturus presently includes ten valid species and belongs to the family Scyliorhinidae, which is the most diverse family of sharks, comprising 17 genera and approximately 160 species (Compagno, 1984(Compagno, , 1988Compagno et al., 2005;Ebert et al., 2013;Fahmi and Ebert, 2018). Compagno (1988), in a comprehensive review of the morphology and systematics of carcharhiniform sharks, divided the Scyliorhinidae into four subfamilies. ...
... The recently described P. nigripalatum from Indonesia (Fahmi and Ebert, 2018) is known from a single specimen with a dark upper palatal area (vs. light in P. angelae), greater pre-first dorsal-fin length (53.83%) vs. 46.1 and 46.2% TL in P. angelae, fewer teeth (some 50 rows reported by Fahmi and Ebert, 2018) vs. about 100 in P. angelae, upper and lower labial furrows of about equal length vs. upper labial furrow about two-thirds length of lower labial furrow in P. angelae, and dermal denticles on side and upper body tricuspidate vs. trunk lateral denticles teardrop-shaped and lacking lateral cusplets in P. angelae. ...
... The recently described P. nigripalatum from Indonesia (Fahmi and Ebert, 2018) is known from a single specimen with a dark upper palatal area (vs. light in P. angelae), greater pre-first dorsal-fin length (53.83%) vs. 46.1 and 46.2% TL in P. angelae, fewer teeth (some 50 rows reported by Fahmi and Ebert, 2018) vs. about 100 in P. angelae, upper and lower labial furrows of about equal length vs. upper labial furrow about two-thirds length of lower labial furrow in P. angelae, and dermal denticles on side and upper body tricuspidate vs. trunk lateral denticles teardrop-shaped and lacking lateral cusplets in P. angelae. ...
... Rakasiwi) is a fisheries officer with over 10 years of experience in shark and ray data collection in Tanjung Luar, Lombok, and trained in species identification and basic morphometry by Fahmi, and participated in a taxonomic training conducted by the Indonesian Institute of Sciences in 2018. G. Rakasiwi also contributed to the findings of a new species of deep-sea catshark, Parmaturus nigripalatum (Fahmi and Ebert 2018), and a new record of the blurred smooth lanternshark, Etmopterus bigelowi (Fahmi and Ebert 2017) from Lombok. Morphometric measurements (i.e. ...
Context
The taxonomic nomenclature of species can change with the discovery of a distinct species. Such nomenclatural changes occurred for the giant freshwater whipray with the discovery of a similar species in the Indo-Australian region in 2008.
Aims
This paper reports a finding of the giant freshwater whipray in the Lesser Sunda region as the first confirmed record from the area.
Methods
The specimen was identified as the giant freshwater whipray based on its morphological features. Morphometric measurements were taken directly in the field and also based on the scale provided in the photographs.
Key results
The female specimen was recorded from the Alas Strait, West Nusa Tenggara Province, Indonesia on 20 July 2020. It was identified as Urogymnus cf. dalyensis due to its similar morphological characteristics with U. dalyensis from northern Australia but it had a shorter preoral snout and greater distance between the left and right fifth gill slits.
Conclusions
The occurrence of this species in the Lesser Sunda region may confuse U. dalyensis with the close relative from south-east Asia, U. polylepis.
Implications
This record may provide a link between the two species, either as a population structure of the same species or showing a clear separation between the two as distinct species.
... We recorded 73 morphometrics of the three samples in the lab using standard measurements and terminology for other Parmaturus species (Fahmi & Ebert, 2018). Additionally, liver weight (LT in g) and stomach content was recorded. ...
The occurrence of the Filetail catshark Parmaturus xaniurus is rare in the Gulf of California (GC), and its population structure is unknown. We reported its occurrence as bycatch of the Pacific hake fishery in the northern GC. We examined 22 mature females (412-620 mm total length) caught at 263.0-360.2 m depth.
... Some species currently classified in Apristurus have already been assigned to Parmaturus, like A. manis and A. stevensi (Compagno, 1988;Springer, 1979). Parmaturus is a poorly defined genus and most species are known from only one or two individuals (Fahmi, 2018;Séret & Last, 2007;Soares, de Carvalho, Schwingel, & Gadig, 2019;Springer, 1979 ...
The presence of claspers is one of the main characteristics of the cartilaginous fishes, but its variations across taxa have received limited use in shark systematics and have generally been neglected in descriptions of species. Clasper descriptions are available only for a few catshark species and most of these are focused only in external morphology. Besides that, divergences regarding the identification of some structures persist in the literature emphasizing the need of more encompassing morphological comparative analyses on claspers of scyliorhinids. In this study, claspers structures of almost all catshark genera were examined, described, and illustrated (except Akheilos and Pentanchus) and comments on their phylogenetic significance are provided. Some characters such as degree of development of rhipidions and terminal dermal cover, occurrence, position and size of accessory marginal and terminal cartilages proved to be useful for taxonomic purposes and their significance along carcharhiniforms systematics needs to be further investigated.
Research highlights
Clasper morphology of catsharks is described and compared and its systematic significance is discussed here. External morphology and skeleton components of claspers vary widely among scyliorhinids and may be useful in phylogenetic analyses.
Four new species of rare scyliorhinid catsharks are provisionally assigned to the genus Parmaturus: P. lanatus sp. nov. from Indonesia, P. albimarginatus sp. nov. and P. albipenis sp. nov. from northern New Caledonia, and P. bigus sp. nov. from northeastern Australia. These species differ from each other by a combination of body morphology, denticle shape, dentition, colour and vertebral counts. An identification key to the Indo–Pacific Parmaturus species is provided. Comments on the diagnostic features separating the genera Halaelurus and Parmaturus are given.
Four new species of rare scyliorhinid catsharks are provisionally assigned to the genus Parmaturus: P. lanatus sp. nov. from Indonesia, P. albimarginatus sp. nov. and P. albipenis sp. nov. from northern New Caledonia, and P. bigus sp. nov. from northeastern Australia. These species differ from each other by a combination of body morphology, denticle shape, dentition, colour and vertebral counts. An identification key to the Indo-Pacific Parmaturus species is provided. Comments on the diagnostic features separating the genera Halaelurus and Parmaturus are given.
Standard symbolic codes for institutional resource collections in herpetology and ichthyology: an online reference
- L J V Compagno
- S Garman