Reginaldia (Peritogaster), 2006

Csuzdi, Cs., 2006, West African Earthworm Genus Millsonia Beddard, 1894 (Oligochaeta: Acanthodrilidae, Benhamiinae) Reviewed And Separation Of A New Genus, Acta Zoologica Academiae Scientiarum Hungaricae 52 (1), pp. 35-48 : 43-44

Reginaldia (Peritogaster) subgen. n.

Diagnosis. One strong gizzard in segment vi. The other gizzard is vestigial and replaced by the unusually strongly thickened septum 5/6.

Type species: Millsonia anomala OMODEO, 1955

Etymology: From the Latin pereo, peritum = disappeared.

Other species: Millsonia artesetosa SIMS, 1986 ; Millsonia moderata SIMS,

1986; Millsonia omodeoi SIMS, 1986 .

Reginaldia (Peritogaster) omodeoi ( SIMS, 1986)

( Figs 1 , 8, 9 )

Millsonia anomala f. leptocystis OMODEO & VAILLAUD, 1967: 929.

Millsonia omodeoi SIMS, 1986: 304 ., CSUZDI 1996: 362., CSUZDI 2000 a: 75.

Material examined. MRAC 37.048 1 ex. , Ivory Coast, Tiassale. Leg. P. ELSEN, 29. III. 1977 .

Diagnosis. Length 65–105 mm; diameter 5–6 mm; Number of segments 173–252. Setae are closely paired and all on the ventral surface. Female pores paired on xiv, prostate pores on xvii, xix and spermathecal pores on 7/8, 8/9 ( Fig. 8 ). Clitellum saddle-shaped, on xiii–xviii. One gizzard in vi. Septum 5/6 extraordinarily thickened. Last pair of hearts in xii, and three pairs of calciferous glands in xv–xvii. Intestinal caeca seven pairs in xxvi–xxxii. Excretory system meroic, with six pairs of meronephridia and a pair of enteronephric and stomate filiform megameronephridia running into a collecting channel alongside the nerve cord ( Fig. 1 ). Spermathecae elongated sac-shaped without a recognizable duct. The ectalmost part of the spermathecae wear a granulose collar filled with sperm-chambers ( Fig. 9 ).

Remarks. This is the first report of R (P). omodeoi after the description made on the literature data of M. anomala f. leptocystis ( SIMS 1986). Unfortunately I had no possibility to examine specimens of R. (P.) anomala ( OMODEO, 1955) , but the two species seems to be very similar. The only remarkable difference is found in the shape of spermathecae that possess a long, well separated duct, which is missing in R. (P.) omodeoi .

Figures

Figs 1–3. 1 = R. (P.) omodeoi (SIMS, 1986):a = excretory system, b = sketch drawing of the excretory system. Abbreviation – sm: exonephric sac–shaped meronephridium; cch: collecting channel, fm: filiform enteronephric megameronephridium, nc: nerve cord, nf: nephridial funnel. 2–3 = Male field:

Figs 8–9.R.(P.) omodeoi (SIMS, 1986):8 = ventral view of the praeclitellar region, 9 = stermatheca