Plectranthias robertsi Randall & Hoese

Gill, Anthony C., Pogonoski, John J., Moore, Glenn I. & Johnson, Jeffrey W., 2021, Review of Australian species of Plectranthias Bleeker and Selenanthias Tanaka (Teleostei: Serranidae: Anthiadinae), with descriptions of four new species, Zootaxa 4918 (1), pp. 1-116: 102-103

publication ID

https://doi.org/10.11646/zootaxa.4918.1.1

publication LSID

lsid:zoobank.org:pub:3FEF9EA2-B755-4B22-8B6A-FAFC5C0FFCDF

DOI

http://doi.org/10.5281/zenodo.4474413

persistent identifier

http://treatment.plazi.org/id/335587B2-C432-1C68-FF28-FAE7FAC5FC10

treatment provided by

Plazi

scientific name

Plectranthias robertsi Randall & Hoese
status

 

Plectranthias robertsi Randall & Hoese  

Figures 9 View FIGURE 9 , 42 View FIGURE 42 ; Tables 1–16, 19

Common name: Filamentous Perchlet

Plectranthias robertsi Randall & Hoese 1995: 328   , fig. 2, table 1 (type locality, east of Hinchinbrook Island, Queensland).— Allen et al. 2006: 991 (checklist).— Last et al. 2014: 217 (list).— Anderson 2018: 32 View Cited Treatment (checklist). — Parenti & Randall 2020: 29 (checklist).

Diagnosis. The following combination of characters distinguishes P. robertsi   from congeners: segmented dorsal rays 15; fourth or fifth dorsal-fin spine longest; pectoral rays 15–16, usually 16; lateral line complete, with 30–35 tubed scales; circumpeduncular scales 15–16; outer margin of preopercle with 26–52 serrae, and no enlarged antrorse serrations ventrally; scales present on maxilla; scales present on anguloarticular, none on dentary; gill rakers 5–8+13–16, usually 6–7+13–14. The species is also distinctive in having the posterior branch of the second segmented pelvic-fin ray filamentous, and a generally pale preserved coloration with dusky spots on the anterior few lateral-line scales.

Remarks. Randall & Hoese (1995) described P. robertsi   on the basis of the holotype and 32 paratypes from various localities off the Queensland coast (ranging from about 17° to 23°S). Although Randall & Hoese described freshly dead coloration for the species based on a colour slide of one of their specimens, they did not publish the photo. We located three specimens from east of Rockingham Bay, two of which were photographed when fresh. We reproduce one of the photos here ( Figure 42 View FIGURE 42 ). Additional type and non-type specimens were examined from throughout the range of the species ( Figure 9 View FIGURE 9 ).

We add the following new observations: scales with basal cteni; vertebrae 10+16; supraneurals 2; predorsal formula 0/0/2/1+1; dorsal pterygiophores in interneural spaces 9–13 1/1/1+1/1+1/1 or 1/1/1+1/1+1/1+1; 8–9 trisegmental pterygiophores associated with dorsal fin; terminal dorsal pterygiophore in interneural space 17; 4–6 trisegmental pterygiophores associated with anal fin; terminal anal pterygiophore in interhaemal space 4–5; ribs present on vertebrae 3 through 9–10; epineurals present on vertebrae 1 through 9–10; parhypural and hypurals autogenous; well-developed hypurapophysis on parhypural; epurals 3; single uroneural (posterior uroneural absent); ventral tip of cleithrum with well-developed posteroventral process; proximal tip of first anal-fin pterygiophore near distal tips of parapophyses on vertebra 10.

Morphometric data are summarised in Table 19.

Material examined. Queensland, Australia. AMS I.20968-003, 87.1 mm SL (holotype), east of Hinchinbrook Island , 18°03′S, 147°10′E, 357 m, prawn trawl, Australian Museum and Australian Institute of Marine Science team, 27 Feb 1979 GoogleMaps   ; AMS I.37598-006, 73.3 mm SL, east of Swains Reef , 21°48.44′S, 152°59.94′E to 22°00.58′S GoogleMaps   , 153°06.88′E, 201 m, trap, J. Lowry & K. Dempsey, FV Capricorn 1, 14 Sep 1995; AMS I.38088-013, 62.7 mm SL, east of Swains Reef   , 21°50.99′S, 153°01.40′E to 21°59.4′S, 153°06.6′E, 199 m, bottom trawl, J.K. Lowry & K. Dempsey aboard FV Seadar Bay , 11 Sep 1995 GoogleMaps   ; CSIRO H 682-1 View Materials , 78.8 mm SL (paratype), east of Dunk Island   , 17°59.9′S, 147°02.9′E to 17°57.6′S, 147°00.3′E, 250–252 m, lobster trawl, RV Soela Station SO06-85/44, J. Stevens, 29 Nov 1985 GoogleMaps   ; CSIRO H 691-1 View Materials , 81.0 mm SL (paratype), east of Dunk Island   , 17°59.1′S, 147°09.6′E to 17°55.8′S, 147°06.9′E, 400–402 m, lobster trawl, RV Soela Station SO06-85/47, J. Stevens, 29 Nov 1985 GoogleMaps   ; CSIRO H 3645-13 View Materials , 97.8 mm SL, CSIRO H 3645-14 View Materials , 76.6 mm SL, CSIRO H 3645-15 View Materials , 97.2 mm SL, east of Rockingham Bay   , 18°01.5′S, 147°06.2′E to 18°05.9′S, 147°08.9′E, 239–266 m, demersal trawl, G. Yearsley, FRV Southern Surveyor , 30 Nov 1993 (field station number SS0793/ T4) GoogleMaps   ; CSIRO H 3644-14, 112.6 mm SL, east of Rockingham Bay   , 17°56.4′S, 147°02.7′E to 17°59.7′S, 147°07.5′E, 303–320 m, demersal trawl, G. Yearsley, FRV Southern Surveyor , 30 Nov 1993 (field station number SS0793/ T3) GoogleMaps   ; NMV A 4504 View Materials , 2 View Materials : 73.3–89.7 mm SL, 95 km east of Dunk Island   , 18°00′S, 147°02′E to 17°57′S, 146°59′E, 220 m, Engel trawl, RV Soela , 8 Jan 1986 GoogleMaps   .

Additional specimens identified for distribution information. Queensland, Australia   . CSIRO H 719-12, 125 mm SL, CSIRO H 719-13, 105 mm SL, CSIRO H 719-14, 127 mm SL, CSIRO H 719-15 View Materials , 127 View Materials mmm SL   , CSIRO H 719-16, 122 mm SL, CSIRO H 719-17, 125 mm SL (paratypes), Capricorn Channel , southeast of Swain Reefs, 22°56.12′S, 153°00.13′E to 22°53.3′S, 152°59.3′E, 325–338 m, mud bottom, lobster trawl, RV Soela Station SO06-85/12, 18 Nov 1985 GoogleMaps   ; CSIRO H 690-01 View Materials , 3 View Materials : 70–89 mm SL (paratypes), west of Saumarez Reef , 21°33.4′S, 152°58.2′E to 21°31.1′S, 152°58.4′E, 239–247 m, RV Soela Station SO06-85/19, 28 Nov 1985 GoogleMaps   ; QM I.20024, 78.4 mm (paratype), Capricorn Channel , 22°51.7′S, 152°45.7′E, 261 m, trawl, RV Craigmin, 3 Oct 1980 GoogleMaps   ; QM I.24075, 2: 29–92 mm SL, east of Tully , Coral Sea, 17°57.06′S, 147°02.5′E, trawl 287–300m, Cidaris   , 16 May1986 GoogleMaps   ; QM I.24145, 78 mm SL, east of Tully , Coral Sea, 17°55.38′S, 147°00′E, trawl 295–309m, Cidaris   , 16 May 1986 GoogleMaps   ; QM I.24430, 30: 47–113 mm SL, QM I.24527, 3: 74–91 mm SL, QM I.24528, 15: 53–114 mm SL, QM I.24589, 2: 84–87 mm SL, Coral Sea , east of Innisfail, 17°38′S, 146°50′E, trawl 298–301m, Cidaris   , 15 May 1986 GoogleMaps   .

CSIRO

Australian National Fish Collection

RV

Collection of Leptospira Strains

NMV

Museum Victoria

QM

Queensland Museum

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Perciformes

Family

Serranidae

Genus

Plectranthias

Loc

Plectranthias robertsi Randall & Hoese

Gill, Anthony C., Pogonoski, John J., Moore, Glenn I. & Johnson, Jeffrey W. 2021
2021
Loc

Plectranthias robertsi

Parenti, P. & Randall, J. E. 2020: 29
Anderson, W. D. Jr 2018: 32
Last, P. R. & Pogonoski, J. P. & Gledhill, D. C. & White, W. T. & Walker, C. J. 2014: 217
Allen, G. R. & Hoese, D. F. & Cross, N. J. & Bray, D. J. 2006: 991
Randall, J. E. & Hoese, D. F. 1995: 328
1995