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).