Nereis callaona sensu Augener, 1918

Salazar-Vallejo, Sergio I., León-González, Jesús Angel De & Conde-Vela, Víctor M., 2021, Revision of the species confused with “ Nereis falsa ” de Quatrefages, 1866 (Annelida, Nereididae), European Journal of Taxonomy 779, pp. 1-70 : 46-47

Nereis callaona sensu Augener, 1918

Nereis callaona Augener, 1918: 184–186 (non Grube & Kröyer in Grube, 1857).

Nereis falsa – Fauvel 1936: 35; 1950: 353. — Fauvel & Rullier 1957: 73–74. — Amoureux 1973: 53 (non de Quatrefages, 1866).

Diagnosis

Nereis with dorsal brownish pigmentation as trapezoidal transverse bands; parapodial glands dark. Jaws with 6 denticles; paragnaths formula: I: 2 in tandem; II: about 28 in three rows; III: about 50; IV: about 34; V: 0; VI: 3–5; VII–VIII: 2 irregular bands with about 60 paragnaths (largest paragnaths in I, VI, VII–VIII).

Material examined

None.

Remarks

Dark pigmented glands in parapodial ligules have been reported several times for West African specimens recorded as N. callaona . Augener (1918: 184) and later Fauvel (1936: 35) noted 2–3 transverse rows of paragnaths in pharyngeal areas VII–VIII. Fauvel recorded this species with a single specimen from Agadir (30°25′00″ N, 09°35′00″ W), on ascidians. He gave the paragnath formula as: I: 0, 2; II: two arches; III: rectangular group; IV: arched groups; V: 0; VI: 3–5 large paragnaths in a cross on each side; VII–VIII: 2–3 irregular series with subequal paragnaths. The presence of a dorsal homogomph falciger was indicated with a blade denticulated, and with a ligament from the top. The pigmentation was given as greenish with transverse brownish bands along the anterior region. However, West African specimens differ from typical N. callaona from western South America in several features. In West African specimens, jaws have 6 denticles, but only 4 are present in western South American specimens. In African specimens, the pharyngeal area II has about 28 paragnaths in three rows, whereas American specimens have about 11 in two rows.

Augener (1918: 186) indicated some resemblance of his specimens to N. lucipeta Ehlers, 1908 , and to N. splendida ; we have not seen these specimens and their affinities must be clarified in the future.

Distribution

Togo to Angola, from the intertidal to shallow depths (10 m).