Chone perkinsi, Tovar-Hernández, María Ana, 2005

Tovar-Hernández, María Ana, 2005, Redescription of Chone americana Day, 1973 (Polychaeta: Sabellidae) and description of five new species from the Grand Caribbean Region, Zootaxa 1070, pp. 1-30: 21-25

publication ID

http://doi.org/ 10.5281/zenodo.170270

publication LSID

lsid:zoobank.org:pub:03DFC50B-6138-48C0-A587-89A9C1071436

DOI

http://doi.org/10.5281/zenodo.3507295

persistent identifier

http://treatment.plazi.org/id/B33D879C-6673-7B62-FEBB-F4B5B5E6FE47

treatment provided by

Plazi

scientific name

Chone perkinsi
status

sp. nov.

Chone perkinsi   sp. nov.

Figures 10 View FIGURE 10 A –P, 11 A –G

Material examined

Type material: Holotype [ FSBC I 66735 View Materials ], Paratypes [ FSBC I 43705 View Materials ] EJ 82215 (7, 1 mounted in gold for SEM), [ECOSUR 0053] (1): Dade County, Dumfounding Bay, 75 ’ W of ICW marker 50, 1.98 m, 25 ° 56 ’ 48 ’’ N, 80 ° 07’ 47 ’’ W.

Non­type materials: Eastern Florida [ FSBC EJ 78136] Canaveral, December 1978 (4). Dade County, South Biscayne Bay: [ FSBC EJ 81143] Cat. 43699, E side of Chicken Key aligned with Shoal Point, 25 ° 36 ’ 52 ’’ N, 80 ° 17 ’ 29 ’’ W, 2.23 m (1). [ FSBC E J 82186 View Materials ] Cat. 43701, off former Turkey Pt. Power station effluent canal, 25 ° 25 ’ 11 ’’ N, 80 ° 19 ’ 28 ’’ W, 1.21 m (2). [ FSBC EJ 82191] Cat. 43702, Southwest of Black Ledge, 25 ° 33 ’ 59 ’’ N, 80 ° 16 ’ 52 ’’ W, 1.37 m (2). [ FSBC EJ 82204] Cat. 43703, E side of Chicken Key aligned with Sola Point, 25 ° 36 ’ 52 ’’ N, 80 ° 17 ’ 29 ’’ W, 1.67 m (1). [ FSBC EJ 82221] Cat. 43704, 60 ’off lighted dock on W shore WNW of ICW marker 39, 25 ° 49 ’ N, 80 ° 10 ’ 55 ’’ W, 1.67 m (6). Western Florida [ FSBC EJ 81106] Indian River, 1 –BC –E, April 14, 1981 (6). [ FSBC EJ 81106] CR – 1 –BC –E, April 14, 1981 (3). [ FSBC EJ 73540] Cat. 17315. Pinellas County, Tarpon Springs, Anclote Anchorage, 28 ° 12.7’ N, 82 ° 46.4’ W, 1 m (3). [ FSBC EJ 97019] Cat. 66314, Florida Keys, off Stock Island, Monroe Co, sample 187383, June 16, 1997 (1).

Description (inside parentheses variation observed in paratypes)

Color, body shape and size: Body pale in preserved material, radioles with 5–6 dark brown bands ( Figure 10 View FIGURE 10 A), each band constituted by a variable number of bright brownish spots (2–15 pairs) surrounding the cells of the branchial skeleton ( Figure 10 View FIGURE 10 G), pinnular skeleton purple­brownish; body cylindrical in thorax and anterior part of abdomen ( Figures 10 View FIGURE 10 A, 11 A), depressed in posterior part of abdomen ( Figure 11 View FIGURE 11 B); BoL= 5 mm (2.5–5.5), W= 0.75 mm (0.5– 1).

Branchial crown: BrCL= 3 mm (1 –2.5), RML/BrCL= 0.75/ 1. Radioles: 5 (5–6) pairs, narrow flanges ( Figure 10 View FIGURE 10 D, F), pinnules long with similar length throughout radiole, RT= medium­sized [8 pinnules] ( Figures 10 View FIGURE 10 D –F). BrL= small, not exposed beyond collar ( Figures 10 View FIGURE 10 A –B). DL= 4 times longer than wide, without a discernable longitudinal ridge. VL= rounded, as long as wide, about one half of the DL length. VRA= 1 pair, about one half of the BrCL.

Peristomium   : APRL = not exposed beyond collar, ventral margin distally entire, long, triangular. PPRC = antero­dorsal, lateral and ventral collar margins entire ( Figures 10 View FIGURE 10 A –B), ventral slightly higher. VSC= swollen, horseshoe­shaped, 2 times wider than long ( Figure 10 View FIGURE 10 A). PPRCL / Ch 1 L= 1.5/ 1.

Thorax: Chaetiger 1 = Notopodia: two groups of 6 elongate, narrowly hooded chaetae. Chaetigers 2 to 8 = Notopodia: SG= 2 rows of 6 elongate, narrowly hooded chaetae ( Figures 10 View FIGURE 10 O, 11 E); IG= 1 anterior row with 3 short bayonet chaetae ( Figures 10 View FIGURE 10 I –J), 2 posterior rows of 6 symmetrical, paleate chaetae with long mucro ( Figures 10 View FIGURE 10 K –L, 11 E). Neuropodia: one row of acicular uncini, MF= 4, covering one half of the MF length ( Figure 11 View FIGURE 11 C), teeth above MF unequal in size, basal tooth bigger than teeth in distal rows, hood present, handles long. GR 2 = broad dorsally ( Figure 10 View FIGURE 10 B).

Abdomen: AS = 18 (17–20). Anterior segments: 2 transverse rows of 6 elongate, narrowly hooded chaetae ( Figure 10 View FIGURE 10 H), chaetae from the upper row 50 % shorter than chaetae in lower row; uncini with MF= 5, covering one half of the MF length ( Figures 11 View FIGURE 11 D, G), teeth above MF equal in size, breast rectangular, well developed, main fang not extending beyond breast, handles absent. Posterior segments: 3 modified, elongate, narrowly hooded chaetae, 25 % longer than in anterior segments; 5–7 orange, modified uncini per torus, MF= 7–8, covering three quarters of the MF length ( Figure 11 View FIGURE 11 F), teeth above MF equal in size, breast rectangular, poorly developed, main fang not extending beyond breast, handles absent ( Figures 10 View FIGURE 10 M –N). Pygidium rounded, depressed, without cirrus ( Figures 10 View FIGURE 10 C, 11 B).

Gametes: Females with oocytes in thorax.

MGS: Solid color in the basal half of the ventral shield of the collar. Color only in the lateral sides dorsally. Last 7 abdominal segments not colored ventrally.

Remarks: Chone perkinsi   sp. nov. is unique among the species herein described by having a glandular ridge on segment 2 that is broader dorsally (in other species, the ridge is of the same width around the segment); and radioles with 5–6 dark brown bands, each band constituted by a variable number of bright brownish spots (2–15 pairs) surrounding the cells of the branchial skeleton. Giangrande (1992) recorded specimens of Chone arenicola Langerhans, 1880   , from the Mediterranean Sea with double eye spots, formed by epithelial cells, without lenses, surrounding the radiolar cartilaginous cells. Chone perkinsi   sp. nov., and C. eniwetokensis   have paleate chaetae with long mucro, they differ by having branchial lobes not exposed beyond the collar in C. perkinsi   , while they are exposed in C. eniwetokensis   .

Etymology: This species is named after Thomas Perkins (Florida Department of Enviromental Protection, Marine Research Institute) in recognition of his important contributions to the knowledge of polychaetes, and especially because of his publications on sabellids.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Sabellida

Family

Sabellidae

Genus

Chone