Chrysopetalum maculatum Aguado, Capa & San Martín, 2003

Cruz-Gómez, Christopher, 2021, A new genus and seven new species of chrysopetalids (Annelida, Chrysopetalidae) from the Tropical Eastern Pacific, Zootaxa 5068 (1), pp. 1-59 : 38

publication ID

https://doi.org/ 10.11646/zootaxa.5068.1.1

publication LSID

lsid:zoobank.org:pub:F0D7412B-5968-4459-9BA4-F1A314BA8EC7

DOI

https://doi.org/10.5281/zenodo.5701928

persistent identifier

https://treatment.plazi.org/id/044C3804-7145-EF19-D7D3-FD5020D094FD

treatment provided by

Plazi

scientific name

Chrysopetalum maculatum Aguado, Capa & San Martín, 2003
status

 

Chrysopetalum maculatum Aguado, Capa & San Martín, 2003 View in CoL

Figs 21 View FIGURE 21 , 26 View FIGURE 26

Chrysopetalum maculata Aguado, Capa & San Martín, 2003: 89–92 View in CoL , Figs 4–6 View FIGURE 4 View FIGURE 5 View FIGURE 6 .

Chrysopetalum maculatum View in CoL . — Read 2018: WoRMS (correction of the epithet).

Type locality: Bajo Mali Rock (7º39´00”N, 81º41´40”W), Coiba Island, Panamá, on coarse sand at 0–4 m ( Aguado et al. 2003) GoogleMaps .

Material exmined. Baja California Sur: UMAR-Poly 942, La Paz Bay, coll. RBZ, no further data .

Description. Based on the only specimen found: complete with 32 segments. TL= 2.7 mm, TW= 0.4 mm. Body long, broad, tapered posteriorly ( Fig. 21A View FIGURE 21 ). Body pale orange. Paleae fan bright yellow, slightly imbricated dorsally.

Prostomium visible between the first two segments. Lateral antennae short, inserted on the antero-ventral prostomial margin, median antenna short, half of lateral ones, inserted in front of the first pair of eyes. Eyes red-violet, two pairs. Nuchal organ, small, not covering the prostomium ( Fig. 21B View FIGURE 21 ). Palps long, cylindrical, visible in dorsal view. Mouth fold large, placed between segment 3 and 4. Pharynx eversible, not exposed, stylets thick.

Parapodium from segment 27, notochaetae in three main groups ( Fig. 21D View FIGURE 21 ). Notochaetae: lateral group inserted below notaciculum, 3–4 paleae, narrow and asymmetrical, with 1–2 internal ribs ( Fig. 21E View FIGURE 21 ); subunit 1, 1 paleae, broader and asymmetrical, with 5 internal ribs ( Fig. 21F View FIGURE 21 ). Main group, 20–24 paleae; lateral-most paleae, asymmetrical, with (8) 10–13; mid-most paleae, symmetrical, with 10–11 internal ribs and 0–1 raised ribs; midline-most paleae, asymmetrical, with (8) 10–12 ( Fig. 21G View FIGURE 21 ). Median group, 3–4 paleae, shorter, curved and asymmetrical, with 4–8 internal ribs and 0–1 raised rib ( Fig. 21H View FIGURE 21 ). All paleal groups with margins finely serrated, dorsal paleal surface ornamented with raised tubercles.

Neuropodium conical, longer than notopodium. Neurochaetae: unit 1, 2–5 falcigers, blades straight and long, 11–12 times longer than wide ( Fig. 21I View FIGURE 21 ). Unit 2, 6–8 falcigers, blades straight and medium-sized, 3–4 times longer than wide. Unit 3, 5–6 falcigers, blades straight and medium-sized, 6–7 times longer than wide ( Fig. 21K View FIGURE 21 ). Unit 4, 2–3 falcigers, blades straight and short, 2–3 times longer than wide ( Fig. 21L View FIGURE 21 ). Pygidium rounded with two anal cirri ( Fig. 21C View FIGURE 21 ). Oocytes not seen.

Habitat. Intertidal to subtidal (0–10 m). The sole specimen examined was possibly obtained from dead coral (Bastida-Zavala Pers. Comm. 2017). Previously, specimens of C. maculatum were collected in rocks, dead coral, and coarse sand ( Aguado et al. 2003; Cruz-Gómez & Bastida-Zavala 2018).

Distribution. From La Paz Bay, Baja California Sur to Roca Bajo Mali, Panamá ( Fig. 26 View FIGURE 26 ).

Remarks. Recently, the suffix of the epithet was modified by Read (2018) to match with the neuter gender of the genus ( ICZN 1999, Art. 31.2). The species is easily distinguishable among Chrysopetalum due to broad main paleae.

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Chrysopetalidae

Genus

Chrysopetalum

Loc

Chrysopetalum maculatum Aguado, Capa & San Martín, 2003

Cruz-Gómez, Christopher 2021
2021
Loc

Chrysopetalum maculata

Aguado, M. T. & Capa, M. & San Martin, G. 2003: 92
2003
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