Leitoscoloplos pugettensis ( Pettibone, 1957 )

Dean, Harlan K. & Blake, James A., 2015, The Orbiniidae (Annelida: Polychaeta) of Pacific Costa Rica, Zootaxa 3956 (2), pp. 183-198 : 187-188

publication ID

https://doi.org/ 10.11646/zootaxa.3956.2.2

publication LSID

lsid:zoobank.org:pub:80102A8C-F6C0-43C4-81A1-B33E10EE889E

DOI

https://doi.org/10.5281/zenodo.6115428

persistent identifier

https://treatment.plazi.org/id/2C0487A6-FFCF-FF9E-99EB-FB1DFBF6FBA1

treatment provided by

Plazi

scientific name

Leitoscoloplos pugettensis ( Pettibone, 1957 )
status

 

Leitoscoloplos pugettensis ( Pettibone, 1957) View in CoL

Figures 2 View FIGURE 2 (C–E), 6 (A–B)

Scoloplos elongata Johnson 1901: 412 View in CoL –413, P1. 10, Figs. 105–110.

Haploscoloplos elongata: Hartman, 1944: 257 View in CoL ; 1948: 30; 1955:174.

Haploscoloplos elongatus: Hartman, 1957: 273 View in CoL –275, pl. 26, Figs. 1 View FIGURE 1 –11; 1960: 107–108; 1961: 265; 1963: 36; 1969: 19–22, Figs. 1–5 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 .— Fauchald, 1972: 166.— Vargas et al., 1985: 336.— Maurer et al. 1988: 47.— Molina-Lara & Vargas Zamora, 1995: 198.— Dean, 1996a: 74. Not Imajima & Hartman, 1964.

Scoloplos (Scoloplos) pugettensis Pettibone, 1957: 163 View in CoL .

Leitoscoloplos pugettensis: Blake, 1980:1 View in CoL ‒18, Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 ; 1996:9‒10, Fig. 1.2.— Hobson & Banse, 1981:28.— Mackie, 1987:8 ‒9, Fig. 8.— Hernández-Alcantara & Solis-Weiss, 1993:1029.—de León-González & Rodriguez, 1996:172.

Scoloplos acmeceps: Vargas et al. 1985:336 View in CoL .—Dean, 2009:146. Not Chamberlin, 1919.

Material examined. Gulf of Nicoya: Sta. 22, 9°48ˊ25″N, 84°52ˊ40″W, 22 m, muddy sand, 11 Jul 1980 (2), 1 Oct 1980, 1 ( MZUCR); Sta. 24, 9°49ˊ25″N, 84°41ˊ20″W, 11 m, sand, 1 Oct 1980, 4 ( MCZ 83994), 8 Jun 1981 (9); 4 Aug 1981, 3 ( MZUCR): Sta. 28, 9°52ˊ16″N, 84°45ˊ30"W, 26 m, mud, 4 Aug 1981 (2): Sta. 29, 9°54ˊ55″N, 84°45ˊ15″W, 18 m, muddy sand, 1 Oct 1980 (1); 1 Apr 1982, 1 ( MCZ 70322), 1 ( MCZ 85626), 2 ( MCZ 85695); Sta. 30, 9°54ˊ40″N, 84°45ˊ50″W, 18 m, muddy sand, 27 Jan 1980 (1). Punta Morales, Playa Blanca, 10°04ˊN, 84°58'W, lower intertidal, muddy sand, col: J. A. Vargas, 1986 (1); col: H.K. Dean, 20 Dec 1986 (31). Guanacaste, Bahia Culebra: Sta. 5, 10º35ˊ25.2″N, 85º39ˊ31.1″W, 2 m, 19 May 2011 (1); Sta. 9, 10º35ˊ30.0″N, 85º39ˊ43.4″W, 5 m, 19 May 2011 (11). Golfo Dulce, intertidal, 1996, (1), col: H. Buttner.

Description. Complete specimens 12.6, 15.7, and 18.5 mm long; 0.52, 0.54 and 0.45 mm. maximum thoracic width, respectively; incomplete specimens from 0.15–1.25 mm maximum thoracic width ( Fig. 2 View FIGURE 2 C). Prostomium short, conical; eyespots lacking; paired dorsolateral nuchal organs present. Peristomium short, one-half prostomial length, subequal to setiger one. Thorax with 12–17 setigers, flattened dorso-ventrally. Branchiae from penultimate thoracic segment, occasionally in last thoracic segment of smaller individuals.

Thoracic notopodia with triangular postsetal lobe, larger in posterior thoracic setigers; neuropodial postsetal lobe short, digitate, larger in posterior thoracic segments ( Fig. 6 View FIGURE 6 A). Abdominal notopodial postsetal lobes subtriangular in mid-body segments, shorter than branchiae ( Fig. 2 View FIGURE 2 D), becoming more lanceolate and subequal to branchiae posteriorly ( Fig. 2 View FIGURE 2 E); neuropodial postsetal lobes foliose, bifurcate, medial arm twice length of lateral branch, with well-developed subpodial flange ( Fig. 2 View FIGURE 2 D, E).

Camerated capillary setae present throughout thoracic setigers and abdominal neuropodia, with an additional flail setae ( Fig. 6 View FIGURE 6 B) accompanying camerated capillaries in abdominal notopodia.

Pygidium with long paired dorso-lateral anal cirri.

Remarks. Leitoscoloplos pugettensis was described by Pettibone (1957) from Puget Sound in Washington State from mud and gravelly sand. She synonymized Haploscoloplos elongatus (Johnson, 1901) , also described from Puget Sound, and later reported from British Columbia, Canada, California and Pacific Panama.

The variability in thoracic length of this species may be correlated with the body size of Costa Rican specimens. Mackie (1987) reported 19–20 thoracic setigers in specimens from Washington State and 19–22 in specimens from British Columbia while Blake (1996) reported thorax lengths of 14–20 in California specimens.

Mackie (1987) examined paratypes of this species from Puget Sound and found branchiae first occurred as small papillae on setigers 13–15 in specimens with 19–22 thoracic setigers. Pettibone (1957) reported the branchiae from setigers 15–18 in specimens with 19–22 setigers. Blake’s (1996) California specimens were of a greater size range, with branchiae from setigers 14–20 with the onset of branchiae from the one or two most posterior thoracic segments. Costa Rican specimens agree with Blake’s California material in that the branchiae are almost always present from the last two thoracic segments.

L. pugettensis View in CoL is similar to L. chilensis ( Hartmann-Schröder, 1965) View in CoL which is redescribed by Mackie (1987) as having a maximum of 15–16 thoracic setigers, thoracic branchiae, and morphologically similar abdominal notopodial and neuropodial lamellae. It differs from L. chilensis View in CoL in the more triangular neuropodial postsetal lobes in the thorax and the shape of the branchiae which are medially expanded in L. chilensis View in CoL . Flail setae have not been previously reported for L. pugettensis View in CoL .

Distribution. Eastern Pacific Ocean from Alaska to Costa Rica, intertidal to 220 m. Found in muddy to sandy sediments from 11‒ 22 m. in the Gulf of Nicoya and 1.5‒ 5 m in Bahia Culebra.

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Family

Orbiniidae

Genus

Leitoscoloplos

Loc

Leitoscoloplos pugettensis ( Pettibone, 1957 )

Dean, Harlan K. & Blake, James A. 2015
2015
Loc

Scoloplos acmeceps: Vargas et al. 1985 :336

Vargas 1985: 336
1985
Loc

Leitoscoloplos pugettensis:

Leon-Gonzalez 1996: 172
Hernandez-Alcantara 1993: 1029
Mackie 1987: 8
Hobson 1981: 28
Blake 1980: 1
1980
Loc

Haploscoloplos elongatus:

Dean 1996: 74
Molina-Lara 1995: 198
Maurer 1988: 47
Vargas 1985: 336
Fauchald 1972: 166
Hartman 1957: 273
1957
Loc

Scoloplos (Scoloplos) pugettensis

Pettibone 1957: 163
1957
Loc

Haploscoloplos elongata:

Hartman 1944: 257
1944
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