Dichogaster

James, Samuel W. & Gamiette, Franciane, 2016, New species of Dichogaster Beddard, 1888 (Clitellata: Benhamiidae) with additional records of earthworms from Guadeloupe (French West Indies), Zootaxa 4178 (3), pp. 391-408 : 397

publication ID

https://doi.org/10.11646/zootaxa.4178.3.5

publication LSID

lsid:zoobank.org:pub:51B86192-BF51-444F-8C00-960C10E8DF5C

DOI

https://doi.org/10.5281/zenodo.6070199

persistent identifier

https://treatment.plazi.org/id/440C87AD-FF90-C957-FF19-C4A9FDD5FF12

treatment provided by

Plazi

scientific name

Dichogaster
status

 

Dichogaster sp. 2

Material examined. One juvenile, Faux Pitons Bouillantes trail in montane forest bromeliad leaf axils, Basse Terre, Guadeloupe, N16°07.943', W61°43.636', 1018 m asl. GoogleMaps

Description. Setae all ventral, closely paired throughout; DD> ½ circumference. Prostomium epilobous, red anterior dorsal pigmentation. Spermathecal pores in 7/8, 8/ 9 in AB. Ovipores equatorial just median to A in xiv; male pores in xviii; prostatic pores and penial setae at ends of grooves in A in xvii–xix; grooves concave laterally. Clitellum not developed, no other genital markings.

Alimentary canal with proventriculus in v, two long gizzards in vi, vii; esophagus valvular in xvii, intestinal origin xviii; typhlosole a simple low fold originating in xxiii; continuous lateral typhlosoles xxiii–xxviii. Calciferous glands reniform, paired in xv–xvii. Micronephridia 8 per segment, pre-intestinal nephridia tubular; intestinal segment nephridia closed sac-shaped with oil droplets. Vascular system with ventral trunk, single dorsal trunk, latero-esophageal hearts in x–xii.

Fan-shaped ovaries composed of long strings, with funnels in xiii; paired spermathecae in viii, ix, stalked diverticulum with one or two lobes. Male sexual system holandric, testes and funnels in subesophageal sacs x, free in xi; acinous seminal vesicles in xi, xii; tubular prostates; glands of xvii much larger; penial setae very small.

Remarks. The worm is similar to D. matoubensis James, 1996 and to D. musciphila , but does fully not fit the description of either species. Both have longer lateral typhlosoles, more posterior intestinal origins, and have schizolobous prostomiums. However it is similar and may not be more than a variation of D. matoubensis , for which the differences are slightly less.