Pliotrema annae, Anna’s sixgill sawshark

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Pliotrema annae Weigmann, Gon, Leeney & Temple, 2020

Anna’s sixgill sawshark
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Image of Pliotrema annae (Anna’s sixgill sawshark)
No image available for this species;
drawing shows typical species in Pristiophoridae.

Classification / Names Κοινά ονόματα | Συνώνυμα | Catalog of Fishes(Γένος, Είδη) | ITIS | CoL | WoRMS | Cloffa

Ελασμοβράγχιοι (καρχαρίες και σαλάχια) (sharks and rays) > Pristiophoriformes (Saw sharks) > Pristiophoridae (Saw sharks)
Etymology: Pliotrema: Greek, pleios = more + Greek, trema = hole (Ref. 45335);  annae: Named for Anna Weigmann Huerta, the niece of the first author.

Environment: milieu / climate zone / depth range / distribution range Οικολογία

; Θαλασσινό(ά) βενθικό(ς); εύρος βάθους 20 - 35 m (Ref. 122027).   Tropical

Κατανομή Χώρες | Περιοχές FAO | Οικοσυστήματα | Παρουσίες | Point map | Εισαγωγές | Faunafri

Western Indian Ocean: Zanzibar and probably off Kenya and Somalia.

Μέγεθος / Βάρος / Age

Maturity: Lm ?  range ? - ? cm
Max length : 98.0 cm TL (female)

Short description Μορφολογία | Μορφομετρία

This medium-sized six-gilled sawshark is distinguished by the following characters: barbel origin to anterior nostrils 1.9-2.0 times anterior nostrils to symphysis upper jaw; prenarial length 1.6-1.7 times prebarbel length; preoral length 1.5-1.7 times interdorsal space; pectoral-fin anterior margin 1.4-1.5 times dorsal-caudal space; mouth width 2.7-3.2 times spiracle length; the first dorsal fin originates about opposite pectoral-fin free rear tips; lateral trunk dermal denticles tricuspidate, rather flat and imbricated; monospondylous centra 53-54; precaudal diplospondylous centra 46-49; total vertebral centra 154; generally with a shorter snout, head length 34.2-34.5% TL, preorbital length 21.7-22.0% TL, preoral length 24.6-25.1% TL, prebarbel length 12.6-12.7% TL, and barbel origin to symphysis upper jaw 12.1-12.3% TL; with lower total large lateral rostral tooth and ventral rostral spine counts, and a rostrum that is slightly constricted between barbel origin and nostrils. Similar to P. kajae, with barbels situated about half way from rostral tip to mouth, with prebarbel length about equidistant from barbel origin to symphysis of upper jaw, while in P. warreni, the barbels are situated about two thirds way from rostral tip to mouth, with prebarbel length about twice distance from barbel origin to symphysis of upper jaw. Colouration: uniform medium to dark brown dorsally without longitudinal stripes; white ventrally but with few indistinct dark blotches on belly; fins with pronounced white posterior fin margins, especially the caudal and pectoral fins; dorsal rostrum surface with two distinct longitudinal dark stripes, lateral rostral teeth dark-edged (Ref. 122027).

Βιολογία     Γλωσσάρι (π.χ. epibenthic)

Probably occurs in deeper waters during the day but enters shallow water during the night. The specimens were caught directly adjacent to a dropoff along the southern tip of Unguja Island where the water depth descends rapidly from ca.20 m to >200 m (Ref. 122027).

Life cycle and mating behavior Γεννητική Ωρίμανση | Αναπαραγωγή | Γεννοβολία | Αβγά | Γονιμότητα | Προνύμφες

Main reference Upload your references | Αναφορές | Συντονιστής : Compagno, Leonard J.V. | Συνεργάτες

Weigmann, S., O. Gon, R.H. Leeney, E. Barrowclift, P. Berggren, N. Jiddawi and A.J. Temple, 2020. Revision of the sixgill sawsharks, genus Pliotrema (Chondrichthyes, Pristiophoriformes), with descriptions of two new species and a redescription of  P.  warreni Regan. PLoS ONE, 15 (3)[0228791]:1-56. (Ref. 122027)

IUCN Red List Status (Ref. 123251)


CITES (Ref. 123416)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

Περισσότερες πληροφορίες

Χώρες
Περιοχές FAO
Οικοσυστήματα
Παρουσίες
Εισαγωγές
Stocks
Οικολογία
Δίαιτα
Τροφικά αντικείμενα
Κατανάλωση τροφής
Σιτηρέσιο
Κοινά ονόματα
Συνώνυμα
Μεταβολισμός
Θηρευτές
Οικοτοξικολογία
Αναπαραγωγή
Γεννητική Ωρίμανση
Γεννοβολία
Συναθροίσεις γεννοβολίας
Γονιμότητα
Αβγά
Egg development
Age/Size
Αύξηση
Length-weight
Length-length
Length-frequencies
Μορφομετρία
Μορφολογία
Προνύμφες
Δυναμική προνυμφών
Στρατολόγηση
Αφθονία
BRUVS
Αναφορές
Υδατοκαλλιέργειες
Προφίλ υδατοκαλλιέργειας
Στελέχοι
Γενετική
Συχνότητες αλληλόμορφων
Κληρονομικότητα
Ασθένειες
Μεταποίηση
Nutrients
Mass conversion
Συνεργάτες
Φωτογραφίες
Stamps, Coins Misc.
Ήχοι
Σιγκουατέρα
Ταχύτητα
Κολυμβητικός Τύπος
Επιφάνεια βραγχίων
Otoliths
Εγκέφαλοι
Όραση

Εργαλεία

Special reports

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Διαδικτυακές πηγές

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: Γένος, Είδη | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Δέντρο Ζωής | Wikipedia: Go, αναζήτηση | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = No PD50 data   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref. 93245).
Τροφικό Επίπεδο (Ref. 69278):  4.0   ±0.6 se; based on size and trophs of closest relatives
Ελαστικότητα (Ref. 120179):  .
Vulnerability (Ref. 59153):  Moderate to high vulnerability (50 of 100) .