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

(Figs 2E; 10)

urn:lsid:zoobank.org:act: D2235D38-95FC-44C7-8FDE-CD45AC4F308F

TYPE MATERIAL. — Holotype. French Guiana • Adult specimen; Tumuc-Humac, Mitaraka Massif, plateau forest on DIADEMA project C trail, in the soil; 2°13’58”N, 54°26’38”W; 449 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0289; MNHN.

Paratypes. French Guiana • 2 adult specimens; Tumuc-Humac, Mitaraka Massif, plateau forest at base camp; 2°14’2”N, 54°27’1”W; 331 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0285, EW-MI15-0303; CEFE • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, plateau forest on DIADEMA project C trail; 2°13’58”N, 54°26’38”W; 449 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0298; CEFE • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, rocky savannah #1 on Sommet en Cloche Inselberg; 2°13’40”N, 54°28’1”W; 623 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0362; CEFE • 3 adult specimens; Tumuc-Humac, Mitaraka Massif, rocky savannah #2 on Sommet en Cloche Inselberg; 2°13’58”N, 54°27’39”W; 427 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0324, EW-MI15-0379, EW-MI15-0157; MNHN • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, transition forest # 1 Sommet en Cloche Inselberg; 2°13’54”N, 54°27’39”W; 401 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; EW-MI15-0336; MNHN • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, transition forest on Tchoukou Chipan Inselberg; 2°14’54”N, 54°29’12”W; 405 m a.s.l.; III.2015; C. Baraloto leg.; BOLD Sample ID: EW-MI15-0108; MNHN • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, tropical rainforest on crowned mountain; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0127; MNHN.

OTHER MATERIAL EXAMINED. — French Guiana • 3 adult specimens; Tumuc-Humac, Mitaraka Massif, hilltop forest on Sommet en Cloche Inselberg; 2°13’42”N, 54°28’2”W; 638 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0152, EW-MI15-0153, EW-MI15-0154; MNHN • 4 juvenile specimens; Tumuc-Humac, Mitaraka Massif, plateau forest on DIADEMA project C trail; 2°13’58”N, 54°26’38”W; 449 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0287, EW-MI15-0288, EW-MI15-0290, EW-MI15-0292; MNHN • 13 juvenile specimens; Tumuc-Humac, Mitaraka Massif, plateau forest on DIADEMA project D trail; 2°12’57”N, 54°27’25”W; 381 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0020, EW-MI15-0021, EW-MI15-0022, EW-MI15-0092, EW-MI15-0093, EW-MI15-0095, EW-MI15-0096, EW-MI15-0097, EW-MI15-0098, EW-MI15-0101, EW-MI15-0102, EW-MI15-0103, EW-MI15-0104; MNHN • 4 adult specimens, 3 juvenile specimens, 5 cocoons; Tumuc-Humac, Mitaraka Massif, rocky savannah #1 on Sommet en Cloche Inselberg; 2°13’40”N, 54°28’1”W; 623 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0155, EW-MI15-0156, EW-MI15-0158, EW-MI15-0159, EW-MI15-0165, EW-MI15-0166, EW-MI15-0167, EW-MI15-0168, EW-MI15-0169, EW-MI15-0160, EW-MI15-0162, EW-MI15-0163; MNHN • 3 adult specimens, 4 juvenile specimens, 2 cocoons; Tumuc-Humac, Mitaraka Massif, rocky savannah #2 on Sommet en Cloche Inselberg; 2°13’58”N, 54°27’39”W; 427 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0320, EW-MI15-0322, EW-MI15-0323, EW-MI15-0331, EW-MI15-0332, EW-MI15-0325, EW-MI15-0326, EW-MI15-0327, EW-MI15-0328; MNHN • 4 juvenile specimens; Tumuc-Humac, Mitaraka Massif, slope forest on DIADEMA project D trail; 2°13’40”N, 54°27’14”W; 339 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0265, EW-MI15-0266, EW-MI15-0267, EW-MI15-0268; MNHN • 1 adult specimen, 2 juvenile specimens, 1 fragment; Tumuc-Humac, Mitaraka Massif, transition forest # 1 Sommet en Cloche Inselberg; 2°13’54”N, 54°27’39”W; 401 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0313, EW-MI15-0354, EW-MI15-0314, EW-MI15-0338; MNHN • 4 adult specimens; Tumuc-Humac, Mitaraka Massif, transition forest # 2 Sommet en Cloche Inselberg; 2°13’59”N, 54°27’34”W; 395 m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0110, EW-MI15-0111, EW-MI15-0112, EW-MI15-0113; MNHN • 1 adult specimen; Tumuc-Humac, Mitaraka Massif, tropical rainforest on crowned mountain; NA/NA; NA m a.s.l.; III.2015; T. Decaëns, E. Lapied leg.; BOLD Sample ID: EW-MI15-0129; MNHN.

ETYMOLOGY. — This species is named in reference to the Tchoukou Chipan inselberg near which the holotype specimen was collected.

ECOLOGY. — Martiodrilus (B.) tchoukouchipan Decaëns & Bartz, n. sp. has been found in a wide range of well-drained habitats, with a marked preference for rocky savannahs of the inselbergs (38.46% of specimens), plateau forests (32.31%) and inselberg transition forests (15.38%) (Fig. 10D). Most specimens were collected under terrestrial bromeliads covering rocky savannahs (38.46% of specimens), in the organo-mineral soil (38.46%) and a lower proportion in decaying trunks (16.92%) and in litter accumulating on large granite rocks (6.15%) (Fig. 10E). Cocoons are tan yellow, spherical, 4.5-5.5 mm in diameter, with two mucrons at the anterior and posterior ends.

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

DESCRIPTION

External morphology (Fig. 10A, B)

Body shape cylindrical. Body pigmentation dorsally yellow-brown, ventrally yellow.Body length: 56 mm in the holotype, 55 to 75 mm in the paratypes (average: 76.3 mm; n = 6), after ethanol fixation. Body mass: 0.32 mm after ethanol fixation in the holotype, 0.31 to 0.82 g in the paratypes (average: 0.54 g; n = 6). Diameter: 3 to 5.5 mm in the preclitellar region, 3.9 to 5.5 mm in the clitellum, 3.2 to 4.7 mm in the postclitellar region. Number of segments: 96 in the holotype, 101 to 145 in the paratypes (average: 128.3; n = 6). Prostomium proepilobic. One pair of longitudinal grooves passing through segment I in line of nephridial pores in II. Setae closely paired, ab and cd beginning in III or IV. Setal arrangement aa:ab:bc:cd:dd = 6:1:9:1:31. Clitellum in (dorsal XIV) XV (XVI)-½ XXV, saddle-shaped (Fig. 10A). Genital markings variable in V-VIII and in X-XII, and intraclitellar in XV-XVIII (ab position). Tubercula pubertatis linear in 1/4XX-1/3XXV (Fig. 10B). Male pores not recognised externally, internally open in 19/20, and ovipores not visible. Spermathecal pores in 5/6, 6/7 and 7/8. Nephridial pores begining in II, in CD line.

Internal anatomy (Fig. 10C)

Septa: membranous. Gizzard: muscular and well developed in VI, but displaced to X, XI, with an average size (width × length) of 2.60 × 3.38 mm. Calciferous glands: eight pairs in VII-XIV, those in X and XI slightly smaller; all kidney-shaped with a terminal appendix and tubular composite structure. Esophagus-intestine transition in XVII/XVIII; intestine without caeca. Typhlosole abruptly begining in XXVI, structured as a long-folded lamella occupying all the lumen. Hearts: six pairs, the two intestinal pairs in X-XI and well developed. Excretory apparatus holoic, nephridia with simple nephrostome.Testes sacs:midventral or hypoesophagic in X and XI, enclosing seminal vesicles. Seminal vesicles: two pairs in XI-XII: first pair enclosed in septa extending to IX and X; second pair going until XVII, lobulated with division in the segments and attached to the dorsal body wall. Spermathecae: three pairs, VI, VII and VIII, elongated without diverticula.

REMARKS

Martiodrilus (B.) tchoukouchipan Decaëns & Bartz, n. sp. belongs to the subgenus Botaria because of the presence of 3 pairs of spermathecae. It resembles a group of species sharing a clitellum positioned on XV-XXV, including M. (B.) pavliceki Bartz & Decaëns, n. sp., M. (B.) bicolor, M. (B.) euzonus, M. (B.) gara, M. (B.) gravis, M. (B.) minoriformis, M. (B.) poncei and M. (B.) tutus. However, it differs from these species in the position of the tubercula pubertatis in 1/4XX-1/3XXV which is only compatible with the description of M. (B.) gravis and M. (B.) tutus. It is finally distinguished from the latter two species by its significantly smaller size (55-75 mm, whereas M. (B.) gravis and M. (B.) tutus are larger than 90 mm and 100 mm, respectively). Martiodrilus (B.) tchoukouchipan Decaëns & Bartz, n. sp. is clearly separated from the other species of Martiodrilus from the Mitaraka Massif by its COI barcode (Table 2). This species corresponds to OTU#071 in Maggia et al. (2021).