Halosydna olgae, Salazar-Silva, 2013

Salazar-Silva, Patricia, 2013, Revision of Halosydna Kinberg, 1856 (Annelida: Polychaeta: Polynoidae) from the Tropical Eastern Pacific and Grand Caribbean with descriptions of new species, Journal of Natural History 47 (17 - 18), pp. 1177-1242 : 1224-1229

publication ID	https://doi.org/ 10.1080/00222933.2012.752934
persistent identifier	https://treatment.plazi.org/id/2D304A56-FFAC-F559-37A3-FE20FBABFEB2
treatment provided by	Felipe
scientific name	Halosydna olgae
status	sp. nov.

Treatment

Halosydna olgae View in CoL sp. nov.

( Figures 24–26 View Figure 24 View Figure 25 View Figure 26 )

Halosydna species A Hartman, 1939a: 37 , plate 4: figures 51–55; Salazar-Silva, 2006: 148–149.

Type material

Holotype ( ECOSUR 0132 View Materials ), Villa las Rosas, Ensenada, Baja California, Mexico, 31 ◦ 52 ′ 19.24 ′′ N, 116 ◦ 40 ′ 43.24 ′′ W, on seagrass roots, 6 March 2004 GoogleMaps . Paratypes: One specimen ( ECOSUR 0133 View Materials ), Villas las Rosas, Ensenada, Baja California, Mexico, 31 ◦ 52 ′ 19.24 ′′ N, 116 ◦ 40 ′ 43.24 ′′ W, 6 March 2004 GoogleMaps . One specimen ( LACM-AHF POLY 2467 ), Consag Rock, Gulf of California, Mexico, station 719-37, R / V Velero III, coll. Allan Hancock Foundation, 24 March 1937 , id. as Halosydna , species A of Hartman (1939a). One specimen ( LACM-AHF POLY 3608 ), Scammon’s Lagoon, Baja California Sur, 27 ◦ 50 ′ N, 114 ◦ 13 ′ W, 3.66 m, among shell, 14 September 1953 GoogleMaps , coll. J.W. Knudsen and D.S. Gorsline, R / V Horizon , station KG-8, id. as Halosydna species A of Hartman, 1939a. One specimen ( LACM-AHF POLY 3609 ), Port San Bartolomé, Baja California Sur, Mexico, 1.1 miles from Kelp Point, 27 ◦ 41 ′ 06 ′′ N, 114 ◦ 53 ′ 38 ′′ W, R / V Velero IV, station 2603-54, from kelp in rocky intertidal, 11 February 1954 GoogleMaps , id. as Halosydna species A of Hartman (1939a). One specimen ( LACM-AHF POLY 3610 ), off Redondo, California, USA, Flat Rock Point, 33 ◦ 47 ′ 50 ′′ N, 118 ◦ 24 ′ 25 ′′ W, rocky intertidal with Kelp and boulders, 18 October 1941 GoogleMaps .

Additional material

Mexico, Pacific Ocean: One specimen ( LACM-AHF POLY 3611), San Eugenio Point, Dewey channel, Baja California Sur, 27 ◦ 49 ′ 50 ′′ N, 115 ◦ 06 ′ 05 ′′ W to 27 ◦ 49 ′ 35 ′′ N, 115 ◦ 06 ′ 00 ′′ W, R / V Velero III, station 1260-41, 43.9 m, on coralline rock, 27 February 1941, id. as Halosydna species A of Hartman (1939a). Two specimens ( LACM-AHF POLY 3612), Scammon’s Lagoon, Laguna ojo de liebre, Baja California Sur, 27 ◦ 50 ′ N, 114 ◦ 13 ′ W, 5.4–9.1 m, rock, coll. J.W. Knudsen and D.W. Gorsline R / V Horizon, station No. KG4, 14 September 1953, id. as Halosydna species A of Hartman (1939a). One specimen ( LACM-AHF POLY 3613), off Pto. Malarrino, Baja California Sur, 27 ◦ 49 ′ 00 ′′ N, 114 ◦ 42 ′ 00 ′′ W, station 2025-51, R / V velero IV, shore rock, 18 April 1951, id. as Halosydna species A of Hartman (1939a).

Etymology

This species is named in honour of Olga Hartman in recognition of her many contributions to the knowledge of polychaetes in the Pacific Coast.

Description

Holotype complete, with 36 segments, 2.3 cm long and 0.3 cm wide. Dorsum with two transverse bands of dark pigment on each segment, cirrophores pigmented, two spots on notopodia ( Figure 24A,B View Figure 24 ). Ventrum with transverse bands of dark pigment along middle line and laterally on each segment. Elytra with small spots of pale pigment, except over the elytrophores. Prostomium bilobed ( Figure 24A View Figure 24 ), wider than long, laterally rounded with diffuse pigment; facial tubercle small; two pairs of eyes, anterior pair on widest part of prostomium, posterior pair dorsolateral, round and dark; median antenna with dark pigmented ceratophore, inserted frontally, style with diffuse brown pigment, subdistally expanded with ring of pigment, abruptly tapering to filiform tip; lateral antennae with ceratophores inserted terminally as prolongations of prostomium lobes, with brown pigment, style as long as prostomium, pigmented basally, similar to median antenna. Palps robust, surfaces with diffuse pigment and papillae, tapering to filiform tips. Pharynx everted, with nine pairs of papillae and two pairs of jaws.

Tentacular segment not visible dorsally; tentaculophores unpigmented, with short chaetae; tentacular cirri of similar shape as antennae. Segment 2 projecting over prostomium as short lobe, with two small dorsal tubercles.

Body with 18 pairs of elytra inserted on segments 2, 4, 5, 7, 9, 11, then alternate to 21, 23, 25, 27, 28, 30, 31, 33. Three posteriormost segments with dorsal cirri. First pair of elytra circular, with short marginal papillae ( Figure 24C–E View Figure 24 ), surfaces with microtubercles and macrotubercles. Microtubercles abundant, conical, sclerotized, distally blunt. Macrotubercles larger, vesicular, not sclerotized, hemispherical ( Figure 24C,D View Figure 24 ). Elytra in median segments ( Figure 24F View Figure 24 ) with few marginal papillae, surfaces with microtubercles and macrotubercles. Microtubercles conical short, sclerotized, numerous on anterior half. Macrotubercles hemispherical, vesicular, not sclerotized ( Figure 24G View Figure 24 ), numerous on posterior half. Elytra in posterior segments without margin papillae, macrotubercles not sclerotized.

Notopodia shorter than neuropodia. Neuropodia robust, prechaetal and postchaetal lobes indistinct, distally truncate; prechaetal lobe with a small rounded lobe near acicular tip. Dorsal cirri similar to antennae. Cirrophores basally expanded. Elytrophores wider than dorsal tubercles. Ventral cirri taper to fine tips. Nephridial papillae long, from segment 8. Anus dorsal; pygidium with two anal cirri similar to dorsal cirri.

Notochaetae shorter than neurochaetae, with rows of spines, the smaller curved, with blunt tips; remaining ones slender, tapering to capillary tips. Neurochaetae with rows of spines, bidentate tips, subdistal tooth short. Chaetiger 1 neurochaetae thinner than remaining parapodia and sharp tip.

Remarks

Paratype LACM-AHF POLY 2467 herein assigned was previously identified as a possible new species by Hartman (1939a), Halosydna species A . However, its features are not comparable with any other known species, which combined with examination of other material, shows the same features ( Figures 25 View Figure 25 and 26 View Figure 26 ) and allows the formal description of this new species.

Type locality

Villa las Rosas, Ensenada, Baja California, Mexico.

Distribution

California, USA; Gulf of California and Baja California Sur, Pacific Side.