Spicomacrurus adelscotti ( Iwamoto & Merrett, 1997 )
publication ID |
https://doi.org/ 10.11646/zootaxa.3888.1.1 |
publication LSID |
lsid:zoobank.org:pub:1B437AE1-CF28-4C1B-95B6-C31A295905A0 |
DOI |
https://doi.org/10.5281/zenodo.10238805 |
persistent identifier |
https://treatment.plazi.org/id/463A8F36-FFA3-FFEB-1297-9AE8E356F948 |
treatment provided by |
Felipe |
scientific name |
Spicomacrurus adelscotti ( Iwamoto & Merrett, 1997 ) |
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Spicomacrurus adelscotti ( Iwamoto & Merrett, 1997) View in CoL
Figs. 3C–D View FIGURE 3 , 4A–B View FIGURE 4 , 5 View FIGURE 5
Hymenocephalus (Spicomacrurus) adelscotti Iwamoto & Merrett, 1997: 514 View in CoL (type locality: 11°54’S, 179°31’W); Iwamoto & Williams, 1999: 176.
Material examined. 1 specimen WAM P.28073-004, 154+ mm TL, 17°45’S, 118°32’E, 600– 690 m GoogleMaps .
Diagnosis. Pelvic fin rays 9; nasal bones closely adjoining along mesial edges, forming three horizontal platelike processes; OL:OH = 1.75.
Comparison. Spicomacrurus adelscotti most closely resembles S. kuronumai , differing in the number of pelvic fin rays (9 vs 8), the more elongate head shape (head length: height = 2.1 vs 1.7) and the more elongate otolith (OL:OH = 1.75 vs 1.45–1.6). The occiput does not show any relict of scales or scale pockets as do the studied specimens of S. kuronumai .
Description. Head morphology ( Figs. 3C–D View FIGURE 3 ): Head length to height about 2.1 with relatively firm head bones and platy spatulate nasal bones closely adjoining along mesial edges. No indication of scales on head. Snout length 26% HL, orbit diameter 29% HL, interorbital width 40% HW. Barbel 18% HL, reaching vertical through center of orbit. Infraorbital, supraorbital and preopercular canal systems narrow with widths <8% HL, covered by rather thick, firm skin. One small pore visible in anterior section of infraorbital skin. Preopercular angle broad, not projecting.
Otolith morphology ( Fig. 4A–B View FIGURE 4 ): Thin, elongate otoliths with slightly convex inner and slightly concave outer face. OL:OH = 1.75; OH:OT = 4. Predorsal lobe moderately developed, narrow; ventral rim shallow; anterior tip blunt, posterior tip moderately pointed. Sulcus slightly supramedian with narrow, ventrally-indented collum. Colliculi large, reaching close to anterior and posterior rims of otolith, caudal colliculum about 1½ times the length of ostial colliculum; pseudocolliculum indistinct, short; TCL:PCL = 9. Dorsal depression large; ventral furrow distinct, turning upwards and away from ventral rim posteriorly.
Distribution. ( Fig. 5 View FIGURE 5 ) Known from only two specimens, the holotype off northern Fiji, and the examined specimen from off Western Australia.
WAM |
Western Australian Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Spicomacrurus adelscotti ( Iwamoto & Merrett, 1997 )
Schwarzhans, Werner 2014 |
Hymenocephalus (Spicomacrurus) adelscotti
Iwamoto, T. & Williams, A. 1999: 176 |
Iwamoto, T. & Merrett, N. R. 1997: 514 |