Martiodrilus ( Botaria ) motoloi Bartz & Decaëns, 2024

Martiodrilus ( Botaria) motoloi Bartz & Decaëns , n. sp.

( Fig. 8 View FIG )

urn:lsid:zoobank.org:act:

TYPE MATERIAL. — Holotype. French Guiana • Adult; Tumuc-Humac, Mitaraka Massif , lowland forest on DIADEMA project A trail, in decaying trunk; 2°14’34”N, 54°27’54”W; 327 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0245 ; MNHN. GoogleMaps

Paratypes. French Guiana • 1 adult specimen; Tumuc-Humac, Mitaraka Massif , lowland forest on DIADEMA project A trail; 2°14’34”N, 54°27’54”W; 327 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0240 ; CEFE GoogleMaps • 1 adult specimen; same data as for preceding; EW-MI15-0246 ; MNHN GoogleMaps .

OTHER MATERIAL EXAMINED. — French Guiana GoogleMaps • 1 fragment, 2 juvenile specimens; Tumuc-Humac, Mitaraka Massif   GoogleMaps , lowland forest on DIADEMA project A trail; 2°14’34”N, 54°27’54”W; 327 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0241 , EW-MI15-0227 , EW-MI15-0250 ; MNHN.

ETYMOLOGY. — This species is named after the word ‘motoloi’, which means earthworm in the language of the Wayana Amerindian people.

ECOLOGY. — Martiodrilus ( B.) motoloi Bartz & Decaëns , n. sp. has been found in lowland forests ( Fig. 8D View FIG ), in decaying trunks (50% of specimens), organo-mineral soil (16.67% of specimens), and in litter accumulation on granite rocks in decaying trunks (33.33% of specimens) ( Fig. 8G View FIG ).

DISTRIBUTION. — Martiodrilus ( B.) motoloi Bartz & Decaëns , n. sp. is only known from the Mitaraka Massif.

DESCRIPTION

External morphology ( Fig. 8A, B View FIG )

Body shape cylindrical. Body pigmentation dorsally dark red-brown, ventrally light brown. Body length: 52 mm in the holotype, 42 to 56 mm in the paratypes, after ethanol fixation. Body mass: 0.19 g after ethanol fixation in the holotype, 0.14 to 0.21 g in the paratypes. Diameter: 3 to 3.6 mm in the preclitellar region, 3.1 to 3.9 mm in the clitellum, 2.8 to 3.4 mm in the postclitellar region. Number of segments: 120 in the holotype, 106 to 115 in the paratypes. Prostomium proepilobic. One pair of longitudinal grooves going anterior to posterior through segment I in line of nephridial pores. Setae closely paired, ab beginning in II, cd begining in III. Setal arrangement aa:ab:bc:cd:dd = 6:1:8:1:26. Clitellum in (dorsal XIV) XV-½ ½XXVI, saddle-shaped ( Fig. 8A View FIG ). Genital markings variable in V-XIII, intraclitellar in XIV-XXIII and then continuing in XXVI-XXVIII ( ab position). Tubercula pubertatis linear in 1/3XX-½XXV ( Fig. 8B View FIG ). Male pores not recognised, and ovipores not visible. Spermathecal pores in 5/6, 6/7 and 7/8, near nephridial pore. Nephridial pores begining in II, in D line.

Internal anatomy ( Fig. 8C View FIG )

Septa: membranous. Gizzard: muscular and well developed in VI, with an average size (width × length) of 1.35 × 2.25 mm. Calciferous glands: eight pairs in VII-XIV, with X and XI smaller than the others; all kidney-shaped with lobular distal appendix and composite tubular structure. Esophagus-intestine transition in XVII; intestine without caeca.Typhlosole abruptly begining in XXIV/XXV, structured as a long thin folded lamella occupying all the lumen. Hearts: five pairs in VII-XI, the two intestinal pairs in X-XI larger. Excretory apparatus holoic, nephridia with simple nephrostome.Testes sacs: midventral or hypoesophagic in X and XI, enclosing the seminal vesicles. Seminal vesicles: two pairs in XI-XII, forming large lobulated masses; the first pair enclosed in septa with hearts, calciferous glands and testes sacs in X, and forming a wing extending anteriously up to IX-X; the second pair extending posteriously up to XIII/XV. Spermathecae: three pairs, VI, VII, VIII; elongated sacs little wavy, without diverticula.

REMARKS

Martiodrilus ( B.) motoloi Bartz & Decaëns , n. sp. belongs to the subgenus Botaria because of the presence of three pairs of spermathecae. It resembles other species of this subgenus which share a clitellum in XV-XXVI, including Martiodrilus ( Botaria) benhami ( Cognetti de Martiis, 1904) , Martiodrilus ( Botaria) feijooi Zicsi, 1998 , M. ( B.) gara , Martiodrilus ( Botaria) gravis ( Cognetti de Martiis, 1904) , Martiodrilus ( Botaria) pano Righi, 1992 , M. ( B.) vassae and Martiodrilus ( Botaria) wayana Bartz & Decaëns , n. sp. It differs from all these species but M. ( B.) gravis and M. ( B.) benhami by the position of its tubercula pubertatis in 1/3XX-½XXV. It can be distinguished from both M. ( B.) gravis and M. ( B.) benhami by its smaller size ( 42 to 56 mm instead of more than 90 mm and 170 mm, respectively), and by its darker pigmentation. Martiodrilus ( B.) motoloi Bartz & Decaëns , n. sp. is clearly separated from other species of Martiodrilus from the Mitaraka Massif by its COI barcode ( Table 2 View TABLE ). This species corresponds to OTU#088 in Maggia et al. (2021).