Proceraea picta Ehlers, 1864

Nygren, Arne, 2004, Revision of Autolytinae (Syllidae: Polychaeta)., Zootaxa 680, pp. 1-314: 68-70

publication ID

10.5281/zenodo.157809

publication LSID

lsid:zoobank.org:pub:471A4E52-4C92-44F8-AB38-CD03071C0067

persistent identifier

http://treatment.plazi.org/id/03CDB626-CC34-4E65-FEE8-7BB88C72849D

treatment provided by

Plazi

scientific name

Proceraea picta Ehlers, 1864
status

 

Proceraea picta Ehlers, 1864  (Fig. 24 A –F)

Proceraea picta Ehlers, 1864: 256  –263, pl. 11, fig. 8–17, pl. 12, fig. 1–2; Langerhans 1879: 577 – 578, fig. 28 A –B; Okada 1933 a: 647 –653, figs 2,5– 6; 1934; 1937: 441–490, figs 19 A –B, 29– 30; Hamond 1967: 1 –4, fig. 1; Hartmann­Schröder 1971: 183 –184; Cantone 1971: 924 –926, figs 2–3; Hartmann­Schröder 1996: 189 –190; Parapar et al. 1996: 144 –146, fig. 1 g –h; San Martín 2003: 469 –473, figs 256 A –F, 257 A –H, 258 A –C; Nygren & Sundberg 2003: GenBank sequences, 16 S rDNA partial sequence AF 474271View Materials, and 18 S rDNA partial sequence AF 474317View Materials.

Myrianida picta Quatrefages 1866: 63  .

Autolytus (Proceraea) pictus Saint­Joseph 1887: 222  –226, pl. 11, fig. 100–105.

Autolytus pictus McIntosh 1908: 211  –214, pl. 47, fig. 1, pl. 49, fig. 8, pl. 71, fig. 2, pl. 79, fig. 21; Elwes 1908: 201; Southern 1914: 41; Allen 1915: 604; 1927: 871–874, fig. 1; Fauvel 1923: 315 –316, fig. 121 A –F; Okada 1929 a; Segrove 1938: 93; Fauvel 1936 a: 32 –33; Cognetti 1957: 67; 1961: 303; Durchon & Wissocq 1964; Wissocq 1964; Verger­Bocquet 1979; 1983.

? Autolytus (Proceraea) picta  Augener 1913: 265 –267.

Material examined. Spain: 4 spms (rear ends in author's collection for DNAAbout DNA analyses), El Caboda, Trafalgar, 36 ° 11 'N 6 °01'W, dive, 5 m, Corallina  sp., Codium  sp., sponges, hydroids, Nov 1999. France: 1 spm, Banyuls­sur­Mer, 42 ° 28.9 'N 03° 08.2E, sponges, hydroids, dive, 10 m, May 1997; 1 spm, Banyuls­sur­Mer, 42 ° 28.9 'N 03° 08.2E, dive, 1–3 m, algae, hydroids, 23 Apr 2001; 1 spm, Banyuls­sur­Mer, 42 ° 28.6 'N 03°09.7'E, dive, 30 m, "coralligene", 26 Apr 2001. Wales: 13 spms (5 spms in formalin, 3 spms on slides (rear ends in author's collection for DNAAbout DNA analyses), and 5 spms in author's collection for DNAAbout DNA analyses), Black Point, 53 ° 18.75 N 4 ° 2.43 E, algae, bryozoans, hydroids, intertidal, May 2000.

Diagnosis. Proceraea  with nuchal epaulettes reaching end of chaetiger 1; characteristic colour markings with 2 black longitudinal lines, and brown squares.

Description. Length 8–18.2 mm for 56–80 chaetigers; width 0.3–0.55 mm. Live specimens with 2 longitudinal dark brown­black lines at each side of dorsum; dorsum brown except for a middorsal band, and transverse segmental bands at every second, third or forth segment that appear to be white; nuchal organs dark brown to black; antennae and first dorsal cirri brown; eyes red (Fig. 24 A, B). Ciliation present on prostomium, nuchal epaulettes, and a few segments ventrally.

Eyes confluent or almost confluent (Fig. 24 B); eye spots absent. Palps in dorsal view projecting 1 / 4 of prostomial length (Fig. 24 B), fused. Extension of nuchal epaulettes to end of chaetiger 1 (Fig. 24 B).

Median antenna reaching chaetiger 11–14 (n= 7). Lateral antennae and dorsal tentacular cirri, length 2 / 3 of median antenna. Ventral tentacular cirri 1 / 3 – 1 / 2 as long as dorsal pair. First dorsal cirri as long as median antenna, second dorsal cirri as long as ventral tentacular cirri. Alternation in direction of cirri not assessed. Dorsal cirri from chaetiger 3, of equal length, 1 / 3 of body width. Cirrophores on tentacular segment and first dorsal cirri present; cirrophores otherwise absent. All appendages cylindrical.

Parapodial lobes rounded conical, small. Anterior chaetigers with 2–3 aciculae, 1–2 in median and posterior. Chaetal fascicle with 10–18 compounds in anterior chaetigers, 4–8 in median and posterior. Compound chaetae in anterior 20–30 chaetigers with small distal tooth (Fig. 24 D), more posterior with large distal tooth, still smaller than subdistal tooth (Fig. 24 E); serration present. Single thick bayonet chaetae (Fig. 24 F), beginning between chaetiger 15–45.

Pharynx with short sinuation anterior to proventricle. Trepan in tentacular segment or chaetiger 1–3, with 18 unequal teeth, 9 large and 9 smaller (Fig. 24 C); 1 large alternating with 1 small, arranged in 2 rings. Basal ring present; infradental spines absent (Fig. 24 C). Proventricle equal in length to 2.5–4 segments in chaetiger 6–10 with 45–48 rows of muscle cells (n= 11). Anal cirri length equal to half of body.

Reproduction and morphology of reproductive stages. Schizogamy by anterior scissiparity behind chaetiger 13. Following descriptions extracted from literature (Saint­ Joseph 1887; McIntosh 1908; Fauvel 1923; Okada 1933 a; Okada 1937; Durchon & Wissocq 1964; Hamond 1967). Male with 6 + 29.2 (+/­ 2.2)+ 21.9 (+/­ 4.7) chaetigers (n= 146) ( Durchon & Wissocq 1964), length 7.4 mm ( Saint­Joseph 1887). Colour as in stock in region a and c, region b with a median dark brown streak, interrupted by pale bands at the usual intervals, lateral on parapodia granular brown. Tentacular cirri 2 pairs. Achaetous knobs not mentioned. As judged from illustrations, all appendages cylindrical; cirri in region a, slightly longer than cirri in region b. Female with 6 + 16.2 (+/­ 1.4)+ 36.1 (+/­ 4.7) chaetigers (n= 114) ( Durchon & Wissocq 1964). Colour as in stock; appendages brown with colourless tips, except for antennae, tentacular cirri, and first dorsal cirri. Tentacular cirri 2 pairs. Achaetous knobs not mentioned. Appendages cylindrical, longest in region b. Cirrophores present in region b ( Hamond 1967: fig. 1). Stolonization period from end of February to end of September ( Durchon & Wissocq 1964).

Habitat. Amongst hydroids, algae.

Distribution. North East Atlantic as far north as the British Islands, Mediterranean.

Remarks. Proceraea picta  is easily identified on its colour pattern. Preserved specimens may not be possible to separate from P. scapularis  , P. pseudopicta  , P. fasciata  , and P. madeirensis  . In 16 SrDNA and 18 S rDNA P. p i c t a and P. scapularis  are almost identical, but a larger sample of individuals of both types from different areas are needed to draw any conclusions. In this study, the two taxa are treated as separate species.

DNA

Department of Natural Resources, Environment, The Arts and Sport

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Order

Phyllodocida

Family

Syllidae

Genus

Proceraea

Loc

Proceraea picta Ehlers, 1864

Nygren, Arne 2004

2004
Loc

Autolytus (Proceraea) picta

Augener 1913: 265

1913
Loc

Autolytus pictus

Cognetti 1957: 67
Segrove 1938: 93
Fauvel 1936: 32
Fauvel 1923: 315
Allen 1915: 604
Southern 1914: 41McIntosh 1908: 211
Elwes 1908: 201

1908
Loc

Proceraea picta

San 2003: 469
Hartmann-Schroder 1996: 189
Parapar 1996: 144
Hartmann-Schroder 1971: 183
Cantone 1971: 924
Hamond 1967: 1
Okada 1933: 647
Langerhans 1879: 577Ehlers 1864: 256

1879
Loc

Myrianida picta

Quatrefages 1866: 63

Loc

Autolytus (Proceraea) pictus Saint­Joseph 1887 : 222

Saint-Joseph 1887: 222