Notaulax salazari, Tovar-Hernández, María Ana, León-González, Jesús Ángel De & Bybee, David R., 2017

Tovar-Hernández, María Ana, León-González, Jesús Ángel De & Bybee, David R., 2017, Sabellid worms from the Patagonian Shelf and Humboldt Current System (Annelida, Sabellidae): Phyllis Knight-Jones’ and José María Orensanz’s collections, Zootaxa 4283 (1), pp. 1-64: 24-27

publication ID

http://doi.org/ 10.5281/zenodo.828032

publication LSID

lsid:zoobank.org:pub:E62F2AD9-112F-40F0-B8E4-6FF79D27C8B2

persistent identifier

http://treatment.plazi.org/id/EE3E87C6-FFBC-A356-FF7F-D86BFBA25B9B

treatment provided by

Plazi

scientific name

Notaulax salazari
status

sp. nov.

Notaulax salazari  sp. nov.

( Figs 11View FIGURE 11, 12View FIGURE 12, 32View FIGURE 32 B)

Material examined. Type material: ARGENTINA, Holotype ( UANL 8060View Materials), two paratypes ( UANL 8061View Materials), Puerto Deseado , Provincia de Santa Cruz, fouling, 0 m depth at low tide, 18 October 2005, coll. E. Schwindt. Additional material: ARGENTINA, Campaña R / V Walther Herwig 15, UANL 8062View Materials: St. 383, 40°22’S, 59°02’W, 90 m depth, 19 July 1966, 1 specimenGoogleMaps  .

Description. Trunk length 29 mm (18 – 29 mm), width 1.5 mm (1.2 – 1.5 mm). Branchial crown length 11 mm (8 mm), with 14 pairs of radioles. Eight thoracic and 58 abdominal segments (28 – 44, but types lack posterior ends). Branchial lobes joined mid-dorsally. Basal lamina longer than collar segment ( Fig. 11View FIGURE 11 B). Bases of branchial crown with flanges: dorsal ones prominent ( Fig. 11View FIGURE 11 A, B, D, E), ventral flanges reduced. Radioles arranged in two semicircles (13–14 pairs), not involute mid-ventrally and joined by palmate membrane extending 1/3 branchial crown length. Outer margins of radioles flat with broad flanges extending to radiolar tips. Radiolar tips of dorsal and lateral radioles long, occupying space of 10 pinnules ( Fig. 12View FIGURE 12 B), most ventral radioles with short tips (space of 4 pinnules, Fig. 12View FIGURE 12 C). Two rows of lensed eyes per radiole located at 3/4 branchial crown length, separate from palmate membrane, each row with 7–8 eyes ( Fig. 12View FIGURE 12 A). Dorsal lips long, one-half branchial crown length, triangular with radiolar appendage. Ventral lips short, rounded lobes. Radiolar appendages fused to dorsal or ventral lips absent. Parallel lamellae and ventral sacs present, between branchial lobes. Dorsal margins of collar Vshaped, fused to faecal groove ( Fig. 11View FIGURE 11 A, D). Lateral collar margins oblique; anterior peristomial ring not exposed ( Fig. 11View FIGURE 11 B, C, E). Ventral collar lappets triangular, distal margins rounded, with medium incision, 1/2 ventral length of collar ( Fig. 11View FIGURE 11 C, F). Ventral shield of chaetiger 1 rectangular, entire and one- half as wide as adjacent shields ( Fig. 11View FIGURE 11 C, F). Subsequent ventral shields entire, trapezoidal, laterally indented by neuropodial tori ( Fig. 11View FIGURE 11 C, F). Chaetiger 1 with long, slightly oblique longitudinal rows of more than 45 spine-like chaetae. Chaetigers 2 – 8 with notopodia and neuropodia. Superior notochaetae spine-like ( Fig. 12View FIGURE 12 D); inferior notochaetae paleate, without mucro ( Fig. 12View FIGURE 12 D, E). Thoracic uncini avicular, with medium-size handles, developed breast and several rows of minute, similar-size teeth above main fang; companion chaetae with rounded denticulate heads and long, gently tapering asymmetrical membranes. Abdominal interamal eyespots absent. Abdominal tori located anterior to intersegmental lines. Avicular abdominal uncini similar to thoracic; five abdominal paleate neurochaetae with long mucros, and five needle-like chaetae posterior to paleae, two times longer than paleae ( Fig. 12View FIGURE 12 F). Pygidial eyespots unknown. Tubes unknown.

Type locality. Puerto Deseado , Provincia de Santa Cruz, fouling, 0 m depth at low tide. 

Etymology. The species is named after Dr. Sergio I. Salazar-Vallejo, in recognition for his vast knowledge and research on polychaetes. His many publications on polychaetes, importance of taxonomy, his dedication to his students, criticism, simplicity and remarkable generosity are part of his legacy. He also made possible the shipment of additional sabellid samples from Argentina to Mexico.

Remarks. As stated above, only one species of Notaulax  has been described from South America, N. tilosaula  , from the Chilean coast, and there are some records for N. phaeotaenia ( Schmarda, 1861)  in southern waters (see remarks on N. tilosaula  ), as well as N. occidentalis ( Baird, 1865)  by Nonato & Luna (1970) and Rullier & Amoureux (1979), as Hypsicomus elegans ( Webster, 1884)  and Costa-Paiva & Paiva (2007).

Notaulax salazari  sp. nov., differs from N. phaeotaenia  and N. tilosaula  in several features: the ventral margins of collar are entire in N. phaeotaenia  and incised in N. tilosaula  , for about 1/4 the length of ventral lappets, while in N. salazari  sp. nov., there is an incision about 1/2 the length of ventral lappets. In N. salazari  sp. nov. dorsal collar margins are V-shaped (oblique in N. tilosaula  and N. phaeotaenia  ) and angle of lateral collar margins diagonal (V-shaped in N. tilosaula  and even in N. phaeotaenia  ). The ventral shield of the collar is entire in N. salazari  sp. nov., and divided in two areas in N. tilosaula  and N. phaeotaenia  .

Notaulax occidentalis  have a single row of 10–30 radiolar eyes beginning just above the palmate membrane and extending for up to slightly more than 1/2 the free length of radioles ( Perkins 1984; Tovar-Hernández & Salazar-Vallejo 2006). Notaulax salazari  sp. nov., presents two rows of lensed eyes per radiole, located at 3/4 of the branchial crown length, separated from the palmate membrane, each row with only 7–8 eyes. Notaulax tilosaula  has two rows of 30–38 lensed eyes located above palmate membrane and extending to 1/2 of the branchial crown length, the radiolar tips are twice as long as those in N. tilosaula  , and interramal eyespots are present in N. tilosaula  and absent in N. salazari  sp. nov.

Notaulax midoculi ( Hoagland, 1919)  , a species described from Florida, also has a lower number of radiolar eyes, as in N. salazari  sp. nov., (6 versus 7–8 in N. salazari  ). However, these species differ in the shape of ventral lappets of the collar, rounded in N. midoculi  , triangular in N. salazari  sp. nov., and in the location of radiolar eyes, mid-region in M. midoculi  , 3/4 of the branchial crown length in N. salazari  sp. nov.

UANL

Universidad Autonoma de Nuevo Leon

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Sabellida

Family

Sabellidae

Genus

Notaulax

Loc

Notaulax salazari

Tovar-Hernández, María Ana, León-González, Jesús Ángel De & Bybee, David R. 2017
2017
Loc

Notaulax midoculi (

Hoagland 1919
1919