Lanicola eduardoi, Capa, María & Hutchings, Pat A., 2006

Capa, María & Hutchings, Pat A., 2006, Terebellidae (Polychaeta) from Coiba National Park, Panamanian Pacific, including description of four new species and synonymy of the genus Paraeupolymnia with Lanicola, Zootaxa 1375, pp. 1-29 : 18-20

publication ID	https://doi.org/ 10.5281/zenodo.174977
DOI	https://doi.org/10.5281/zenodo.5657465
persistent identifier	https://treatment.plazi.org/id/F84A87E3-7A4C-BD0A-B61C-FEF3FED4FA8C
treatment provided by	Plazi
scientific name	Lanicola eduardoi
status	sp. nov.

Treatment

Lanicola eduardoi View in CoL sp. nov.

Figures 2 View FIGURE 2 J–M, 5A–I

Type locality. Panama, Coiba National Park, Coiba Island.

Material examined. Panama, Coiba National Park. Holotype MNCN 16.01/10526, Coiba Island, 7º37'50''N 81º44'30''W, rocky intertidal, 30 Jun. 1996. Paratypes — MNCN 16.01/ 10527 same sample (10 spec.) — AM W29689, same sample (9 spec.) — USNM 1093377, same sample (10 spec.) — AM W29706, same sample (1 spec. on a SEM stub).

Description. Holotype complete, 75 mm long and maximum width of 5 mm, with 83 segments; colourless. Buccal tentacles all colourless and uniformly thin. Anterior region wider than posterior, body crenulated and tessellated especially anteriorly with five conspicuous transverse ridges on dorsal side of each anterior segment ( Figure 5 View FIGURE 5 A, B). Prostomium without eyespots. One pair of lateral lobes on segment 3, rectangular in shape, as wide as anterior tori and as large as two chaetigers, just covering base of tentacles, not connected mid-ventrally ( Figure 5 View FIGURE 5 C). Two pairs of branchiae on segments 2 and 3, dichotomously branched, with thick and short stalk divided into numerous branches which then further subdivide several times ( Figure 5 View FIGURE 5 A, B). First pair larger, inserted more dorsally than second pair. Fifteen ventral pads from segment 2, diminishing slightly in size posteriorly ( Figure 5 View FIGURE 5 C) to segment 17, thereafter continued as a mid-ventral strip. Nephridial papillae on segments 3, 4, 6 and 7, with first pair located near base of posterior pair of branchiae, remainder inserted posterior to base of notopodia. Notopodia from segment 4, first pair smaller than subsequent ones; rectangular, becoming more erect and less swollen posteriorly ( Figure 5 View FIGURE 5 D, E), in anterior segments surrounded by whitish glandular areas. Notochaetae smooth, narrow-winged capillaries, about 15 per fascicle, arranged in two rows diminishing in length ventrally ( Figure 5 View FIGURE 5 E, G). Neuropodia from segment 5 ( Figure 5 View FIGURE 5 D) and continuing to pygidium. Tori increasing in width along all anterior segments, about twice width of ventral pads and contiguous with them. From segment 18 neuropodial tori erect, rectangular, with rounded margins; posterior ones greatly reduced in size ( Figure 5 View FIGURE 5 I). Uncini arranged in one single row on segments 5–10 ( Figure 5 View FIGURE 5 F) and in double alternate rows, face to face, on segments 11–20 ( Figure 5 View FIGURE 5 H); in single rows on all subsequent segments ( Figure 5 View FIGURE 5 I). Uncini on anterior chaetigers with two rows of big teeth above main fang, dental formula MF:3:2 ( Figures 2 View FIGURE 2 J, 5F), changing in the last double rows of uncini to dental formula MF:1:1-3 ( Figures 2 View FIGURE 2 K, 5H). Uncini from segment 18 with three rows of teeth above main fang with only one tooth above main fang, one row of one or two teeth (dental formula MF:1:1-2) ( Figures 2 View FIGURE 2 L, M, 5I). Pygidium with muscular sphincter, with convoluted walls. Tube made of mucous matrix and mediumsized sand particles (2–4 mm).

Var ia t io n. Most specimens other than the holotype lack posterior segments; the largest paratype is incomplete and measures 90 mm in length. All are colourless after fixation and preservation. In some paratypes the nephridial papillae on segment 4 are not conspicuous.

Remarks. Lanicola eduardoi sp. nov. differs from L. guillermoi sp. nov. in the shape of the body, being a more robust and proportionally wider species, with a conspicuous difference in width between the anterior and posterior regions of the body, while L. guillermoi sp. nov. has a more slender and uniformly wide body. The lateral lobes in segment three are proportionally larger in E. eduardoi sp. nov., reaching the base of the tentacles, while in L. guillermoi sp. nov. they only reach the posterior margin of the first segment. The anterior neuropodial tori are proportionally wider in L. eduardoi sp. nov. (twice the width of ventral pads), than in L. guillermoi sp. nov. (similar to the width of ventral pads). The dental formula of the anterior segments also separates these species, as L. eduardoi sp. nov. has three similar sized teeth on the first row over the main fang, surmounted by a crest of two to five teeth, and L. guillermoi sp. nov. has only one tooth over the main fang and a second row of three to five teeth. Lanicola eduardoi sp. nov. lacks the neuropodial tori with an inflated lobe of posterior chaetigers, present in L. guillermoi sp. nov. Lanicola eduardoi sp. nov is distinguished from the Caribbean species L. carus by the absence of prostomial eyespots, absence of pigmented bands on tentacles, and in the dental formula of uncini. The anterior uncini have three teeth above the main fang in L. eduardoi , but only one tooth in L. carus , and on posterior segments L. eduardoi sp. nov. only has one tooth on the first row over the main fang while L. carus has 2–3 ( Londoño-Mesa 2006). Lanicola eduardoi sp. nov. lacks dorsal tubercles and interramal papillae on anterior segments, characteristic of L. garciagomezi ( Londoño-Mesa 2006) . Lanicola eduardoi sp. nov. resembles L. lobata in lacking prostomial eyes and in the width of the thoracic neuoropodial tori, which are two or three times the ventral pads, but the dental formula on the uncini separates both species as L. lobata has more rows with more teeth each over the main fang.