Lanicola guillermoi Capa & Hutchings, 2006, sp. nov.
Creators: name: Capa, María
name: Hutchings, Pat A.
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Annelida
Polychaeta
Terebellida
Terebellidae
Lanicola
Lanicola guillermoi

description: Lanicola guillermoi sp. nov.
Figures 2 F–H, 4A–J
Paraeupolymia carus: Londoño-Mesa, 2006: 24 –30, Figure 1 a-k, in part (material from Panamanian Pacific).
Type locality. Panama, Coiba National Park, Granito de Oro Island.
Material examined. Panama, Coiba National Park. Holotype MNCN 16.01/10523, Granito de Oro Island, 7º35'30''N 81º42'20''W, 2 m, dead Pocillopora sp., 6 Sep. 1998. Paratypes — MNCN 16.01/10524, same sample (4 spec.) — USNM 1093375, Isla de Uvas 7º49'N 81º46'W, 6 m green filamentous algae 7 Feb. 1997 (2 spec.) — AM W29705, same sample (one specimen on a SEM stub) — MNCN 16.01/10525, Granito de Oro Island, 7º35'30''N 81º42'20''W, 4.5 m, dead Pocillopora sp., 19 Nov. 1997 (3 spec.) — AM W29688, Coiba Island, 7º38'30''N 81º41'40''W, 1.2 m, dead Pocillopora sp., 10 Sep. 1998 (14 spec.) — UMML P568, Gulf of Panama, 8º56'N 79º334'W, 13 May 1967 (1 spec.). Non type material — MNCN, unregistered, Coiba Island, 7º38'30''N 81º41'40''W, dead Pocillopora sp., 2.5 m, 16 Nov. 1997 (1 spec.) — USNM 1093376, Coiba Island, 7º24'20''N 81º41'W, 5.8 m, dead Pocillopora sp., 21 Nov. 97 (2 spec.)— AM W29688, Coiba Island, 7º24'20''N 81º41'W, 2 m, dead Pocillopora sp., 9 Sep. 1998 (1 spec.) — MNCN, unregistered, Granito de Oro Island, 7º35'30''N 81º42'20''W, 3 m, Padina durvillaeii, 20 Jun. 1996 (21 spec.).
Comparative material examined. Lanicola lobata, holotype ZMH P18630 and paratypes ZMH P18631 from Wallaroo, South Australia 33º56'S 137º38'W — AM W20965, Rottnest Island, Western Australia 32º01'S 115º30'E, coralline algae, 16 m (1 spec.).
Description. Holotype complete, 20 mm long and 1.9 mm of maximum width; 68 chaetigers. Preserved body colourless, buccal tentacles pale with transverse purple bands. Anterior segments widest, progressively decreasing in width, with posterior segments short and compacted. Prostomial eyespots arranged in two groups of 15–20, on lateral sides of prostomium. Numerous buccal tentacles arising from thin prostomial tentacular ridge (Figure 4 A–C). One pair of large (but not covering base of tentacles) lateral lobes, rectangular with rounded margins, attached to segment 3 on its dorsal margin and to segment 2 ventrally, equal in width to tori (Figure 4 B, C). Two pairs of branchiae on segments 2 and 3, with short stalk, dichotomous branches and short ramifications; anterior pair larger than posterior, with bases arranged in longitudinal line, dorsal to notopodia (Figure 4 B, C). Fifteen ventral pads from segment 2. Neuropodial tori on these segments increasing in length and decreasing in width posteriorly; anterior tori similar in width than ventral pads and posterior twice width. Nephridial papillae present on segments 3, 4, 6 and 7; first pair inserted dorsal to second pair of branchiae and first chaetiger, others inserted posterior to notopodia (Figure 4 D). Seventeen pairs of notopodia from segment 4, narrow and short anteriorly (Figure 4 D, E), but increasing in length posteriorly (Figure 4 I). Notochaetae narrow-winged, smooth tipped capillaries, about 12–15 chaetae graded in length within fascicle. Neuropodia from segment 5 (Figure 4 D), continue to pygidium. Anterior tori sessile, in contact with ventral pads ventrally, with large number of avicular uncini (>100) per torus. Uncini avicular, arranged in one single row on segments 5–10 (Figure 4 F), in double alternate rows, face to face, on segments 11–20 (Figure 4 G, H). Uncini in anterior chaetigers with single large tooth above main fang and a crest of 3–5 teeth decreasing in size from middle to lateral margin (MF:1:3–5) (Figures 2 F, 4F). Uncini in double rows with fewer and smaller teeth on second row above main fang, decreasing in size posteriorly, dental formula MF:1:3 (Figures 2 G, 4H), and a conspicuous dorsal button (Figures 2 F, 4F). Chaetigers from segment 18 without notopodia; neuropodial tori short, with fewer uncini per torus (~20–30). Tori erect and enlarged towards posterior; each torus almost enclosed with an inflated structure at either end (Figure 4 J). Uncini on posterior segments similar to the anterior, with dental formula MF:1:5; dorsal button sometimes encased in soft tissue (Figure 4 G, H). Pygidium consisting of a rim ornamented with ten small papillae around terminal anus.
Var ia t io n. All specimens lack pigmentation on the body, and most have typical dark transverse bands on tentacles; however some preserved specimens lack pigmentation on the tentacles and in some the eyespots are not visible. The lengths of the body varies from 8 to 2.5 mm. The upper lip is always large but appears smaller when folded ventrally in some specimens. The arrangement and proportional length of branchiae is consistent, with the first pair longer than the second, but some specimens have longer branchiae, longer stalks or more dichotomies than others.
Remarks. Lanicola guillermoi sp. nov. resembles L. carus, from the Caribbean. They are distinguished by the dental formula of uncini on posterior segments as in L. guillermoi sp. nov. there is always one large tooth in the first row above the main fang while in L. carus there are two or three teeth in the first row (Young & Kritzler 1987, Londoño-Mesa & Carrera-Parra 2005, Londoño-Mesa 2006). Other differences between these species are the shape and size of the lateral lobes, subrectangular and not covering the bases of tentacles in L. guillermoi sp. nov., and rounded and longer in L. carus. The material from Balboa examined by Londoño-Mesa and Carrera-Parra (2005) and Londoño-Mesa (2006) and identified as L. carus belong to this new species as they share with the specimens from Coiba National Park all its diagnostic characters.
Lanicola guillermoi sp. nov. differs from L. garciagomezi (Londoño-Mesa, 2006) in the presence of prostomial eyespots, the presence of pigmented bands on tentacles, the lack of tubercles on dorsum, and also in the dental formula.
Lanicola guillermoi sp. nov. can be separated from L. lobata by its dental formula. Type and non-type material of L. lobata has been examined by several authors (Hutchings & Glasby 1988, 1990, Hutchings 1997, and personal observations) as showing some variability in uncinial dentition, having 2–5 teeth in the row above the main fang, whereas the Panamanian species always has a single tooth above the main, and 3–5 in the next row. In addition, L. guillermoi sp. nov. has anterior neuropodial tori narrower than those of L. lobata, and a dorsal papilla on each posterior neuropodial torus which is absent in the Australian species. Lanicola guillermoi sp. nov., is further distinguished from L. lobata and L. eduardoi sp. nov. by the presence of prostomial eyespots in most preserved specimens, always lacking in the other species. Other differences from L. eduardoi sp. nov. are discussed below.
Etymology. This species name is dedicated to Guillermo San Martín, mentor of MC and friend.
description: Published as part of 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, pp. 1-29 in Zootaxa 1375 on pages 14-17, DOI: 10.5281/zenodo.174977