Naineris setosa (Verrill, 1900)

Dean, Harlan K. & Blake, James A., 2015, The Orbiniidae (Annelida: Polychaeta) of Pacific Costa Rica, Zootaxa 3956 (2), pp. 183-198 : 194

Naineris setosa (Verrill, 1900)

Figure 5 (C–G)

Aricia setosa Verrill, 1900:651 –653.

Anthostoma latacapitata Treadwell, 1901:203 –205, Figs. 61–65.

Naineris latacapitata: Treadwell, 1939:254 , Fig. 81.

Naineris setosa: Treadwell, 1936:55 .— Hartman, 1942:61, Figs; 116–118; 1951:67–70, pl. 17, Figs. 1–6 ; 1957:305, pl. 41, Figs. 1–6 .— Rioja, 1960: 303.— Solis-Weiss & Fauchald, 1989:774 –778, Fig. 2 .— Blake & Giangrande, 2011:20 –26, Figs. 1–2 .— Khedhri et al., 2014:85 –86.

Material examined. Punta Morales, Playa Blanca, 10°3′47.2″ N, 84°57′9.2″ W, lower intertidal, muddy sand, 1988 (1), col: J. A. Vargas. Off Costa Rica, Cocos Island, Silverado, 11 m, 23 May 2008 (1 MZUCR); Bahia Chatham Braga, 65 m, 9 April 2008 (1 MZUCR); Wafer Buceo, 10 m, 10 April 2008 (1 MZUCR).

Description. Single complete specimen 196 mm long for approximately 670 setigers, 4.7 mm maximum thoracic width, posterior region narrow with many closely spaced setigers. Prostomium short, rounded, eyespots lacking, nuchal organs not visible ( Fig. 5 C). Peristomium a simple ring, subequal in length to setiger 1. Thoracic region 30 setigers long, flattened dorso-ventrally. Long cirriform branchiae present from setiger 6 ( Fig. 5 C–D).

Thoracic notopodia with low-lying presetal ridge and long, triangular postsetal lobe; presetal neuropodial lobe a low ridge, postsetal lobe expanded, approaching setal length, with short, triangular point dorsally ( Fig. 5 D). Abdominal notopodial presetal lobe a low ridge, postsetal lobe long, cirriform, extending beyond branchial length; pre- and postsetal lobes of abdominal neuropodia short, triangular ridges, postsetal lobe with a dorsal point ( Fig. 5 E); in far posterior setigers postsetal lobes on notopodia long, narrow, shorter than branchiae, neuropodial postsetal lobe long, narrow, approximately one-third length of notopodial postsetal lobe ( Fig. 5 F). Setae crenulated capillaries throughout; accompanied by 1‒3 furcate setae in abdominal notopodia ( Fig. 5 G).

Remarks. A more detailed description of Naineris setosa together with a review of its taxonomic history, distribution, biology and ecology was presented by Blake & Giangrande (2011) who reported on an invasive occurrence of the species at a fish aquaculture facility in Brindisi, Italy.

Distribution. A widely distributed species first described from Bermuda and reported from numerous sites in the tropical western Atlantic, Caribbean and Gulf of Mexico ( Blake & Giangrande 2011, Dean 2012). Hartman (1957) first reported this species from Pacific Mexico and Blake & Giangrande (2011) extended its range from Mexico to Costa Rica in the Eastern Pacific. In Costa Rica it was found in the muddy intertidal of Playa Blanca, Punta Morales.

Figures

FIGURE 1. Leitoscoloplos multipapillatus: A, Posterior thoracic parapodium, posterior view; B, Station 29, Gulf of Nicoya specimen, thoracic setiger, anterior view; C, Station 1, Bahia Culebra specimen, posterior end and pygidium. Leitoscoloplos panamensis: D, Station 29, Gulf of Nicoya specimen, thoracic setiger, anterior view; E, Station 29, Gulf of Nicoya specimen, anterior abdominal setiger, anterior view; F, Station 28 Jun, Gulf of Nicoya specimen, posterior abdominal setiger, anterior view. Scale bars: A ‒ F = 100 µm. br = branchiae, ic = interramal cirri, neL = neuropodial lamellae, noL = notopodial lamellae, p = prostomium, per = peristomium, sp = subpodial papillae, vc = ventral cirri.

FIGURE 2. Leitoscoloplos multipapillatus: A, Anterior end, lateral view. Leitoscoloplos panamensis: B, Station 29, Gulf of Nicoya specimen, anterior end, lateral view. Leitoscoloplos pugettensis: C, Station 22, Gulf of Nicoya specimen, anterior end, lateral view; D, Station 9, Bahia Culebra specimen, midbody abdominal setiger, anterior view; E, Station 9, Bahia Culebra specimen, posterior abdominal setiger, posterior view. Leodamas hamatus n. sp.: F, Holotype, posterior thoracic setiger, anterior view; G, Holotype, Posterior notopodial emergent hook. Scale bars: A, C = 1000 µm, B = 500 µm, D, E = 100 µm, F = 50 µm G = 10 µm.

FIGURE 3. Leodamas hamatus n. sp.: A, holotype, anterior end, dorsal view; B, Holotype, posterior abdominal setiger, anterior view; C, Holotype, anterior thoracic mid-neuropodial spine; D & E, Holotype, posterior thoracic mid-neuropodial spines; F, Holotype, abdominal notopodial furcate setae; G, Holotype, posterior neuropodial emergent hooked spine. Scale bars: A = 200 µm, B = 100 µm, C ‒ G = 10 µm.

FIGURE 4. Leitoscoloplos multipapillatus: A, Setigers 17 – 19, ventral view. Leodamas hamatus n. sp.: B, Paratype XXX Anterior region, lateral view; C, Anterior thoracic spines, setiger three, mid-neuropodial region; D, Posterior thoracic spines, setiger 15, mid-neuropodial region; E, Posterior thoracic spines, upper neuropodial region; F, Furcate notosetae, posterior abdominal region; G, Posterior emergent neuroaciculum, posterior abdominal region. Scale bars: A = 200 µm, B = 500 µm, C ‒ E, F, G = 10 µm. h = hoods, stp = stomach papillae.

FIGURE 5. Leodamas treadwelli: A, Station 28 Oct, Gulf of Nicoya specimen, anterior and midbody, lateral view; B, Station 28 Jun, Gulf of Nicoya specimen, notopodial furcate seta. Naineris setosa: C, Playa Blanca specimen, anterior end, dorsal view; D, Playa Blanca specimen, thoracic parapodia, posterior view; E, Playa Blanca specimen, anterior abdominal parapodia, posterior view; F, Playa Blanca specimen, posterior abdominal parapodia, posterior view; G, Playa Blanca specimen, notopodial furcate seta. Scoloplos cryptospinigerus n. sp.: H, Holotype, anterior end, dorsal view; I, Holotype, posterior thoracic neuropodial spines. Scale bars: A, D ‒ E, H = 500 µm, B, G, I = 10 µm, C, F = 1000 µm. s = neuropodial spines.

FIGURE 6. Leitoscoloplos pugettensis: A, Station 9, Bahia Culebra specimen, thoracic setiger, anterior view; B, Station 9, Bahia Culebra specimen, posterior notopodial flail setae. Leodamas treadwelli: C, Station 28 Jun, Gulf of Nicoya specimen, posterior abdominal setiger, anterior view; Scoloplos cryptospinigerus n. sp.: D, Holotype, anterior end, dorsal view; E, Holotype, thoracic parapodia, posterior view; F, Paratype, abdominal parapodia, anterior view; G, Paraytpe, thoracic neurosetal spines. Scale bars: A, F = 50 µm, B = 10 µm, C, E = 100 µm, D = 500 µm, G = 20 µm.