Dolichoiulus typhlocanaria, Enghoff, 2012

Enghoff, Henrik, 2012, Three new species of Dolichoiulus millipedes from the underground of Gran Canaria, with notes on the circumscription of the genus (Diplopoda, Julida, Julidae), European Journal of Taxonomy 15, pp. 1-12 : 3-5

publication ID	https://doi.org/ 10.5852/ejt.2012.15
DOI	https://doi.org/10.5281/zenodo.3858576
persistent identifier	https://treatment.plazi.org/id/03B287DA-FFC9-8345-9366-6029D01CFA17
treatment provided by	Carolina
scientific name	Dolichoiulus typhlocanaria
status	sp. nov.

Treatment

Dolichoiulus typhlocanaria View in CoL sp. nov.

Figs 1 View Fig , 2A View Fig , 3A, B View Fig , 4A, B View Fig

Diagnosis

A blind species of Dolichoiulus . Differs from other blind Dolichoiulus species as shown in Table 1 View Table 1 . Differs from the other blind Dolichoiulus on Gran Canaria in size ( Figs 1 View Fig , 5 View Fig ). Differs from D. oromii sp. nov. in lacking metazonital setae, in having only marginal preanal pilosity, and in having a terminal projection on the mesal ridge of the anterior gonopod. Differs from D. longunguis sp. nov. and the widespread D. typhlops in having clearly slenderer anterior gonopods ( Fig. 3A, B View Fig , cf. Fig. 3D View Fig ).

Etymology

The name (noun in apposition) refers to the blindness of this species from Gran Canaria.

Type locality

GRAN CANARIA (Canary Islands), Barranco del Draguillo.

Material examined (all from Canary Islands: Gran Canaria)

Holotype

♂, Barranco del Draguillo , UTM 28R 4561/30913 (27°56’45’’N, 15°26’45”W), MSS, 26 Dec. 2006, H. López leg. ( DZUL).

GoogleMaps

Paratypes

3 ♂♂, 2 ♀♀, same locality, 16 Aug. 2007, H. López leg. (1 ♂, 1 ♀ DZUL; 2 ♂, 1 ♀ ZMUC); 3 ♂♂, 2 ♀♀, same locality, 26 Dec. 2010, H. López leg. ( ZMUC); 9 ♂♂, 6 ♀♀, same locality, 30 Dec. 2011, H. López leg. ( DZUL).

Referred (non-type) material

2 ♂♂, 1 ♀, Cueva de la Luna, UTM 28R 4478/30873 (27°54’36’’N, 15°31’48”W), 23 Dec. 2006, GIET leg. ( ZMUC); 2 ♂♂ Cueva de los Arrepentidos, UTM 28R 4482/30878 (27°54’51’’N, 15°31’35”W), 26 Dec. 2006, GIET leg. ( DZUL); 1 ♂, 2 ♀♀, Los Majateles, UTM 28R 4505/30915 (27°56’08’’N, 15°30’10”W), MSS, 26 Dec. 2010, H. López leg. ( DZUL).

Total material

21 ♂♂, 13 ♀♀ (1 ♂, 1 ♀ analyzed).

Description

♂: L 14-20 mm, H 1.03-1.26 mm, L/H 13-16, 33-52 podous rings + 1-2(3?) apodous rings in front of telson.

♀: L 15-20 mm, H 1.17-1.41 mm, L/H 12-16, 36-52 podous rings + 2 apodous rings in front of telson.

COLOUR. The preserved specimens are uniform whitish yellow. Defence glands in part visible by transparency as dark spots.

HEAD. No eyes. 4 supralabral setae. Setae on gnathochilarial stipes: 3 apical, 2-3 (♂) / 0 (♀) nonapical. Length of antennae 156% of H in ♂, 124% of H in ♀.

BODY RINGS. ( Fig. 2A View Fig ) Prozonites posteriorly furrowed, at least in specimens from Cueva de la Luna. Metazonites unvaulted, with c. 12 striae per dorsal quarter. Ozopore c. ⅓ metazonite length behind suture. Limbus cell length c. 4× width; their free margin with a few tiny denticles (as in Enghoff, 1992: figs 28-29).

LEGS. Length 94% of H in ♂, 78% of H in ♀. Claw: length 6-8% of leg, length/height 3.4-5.2. Accessory claw 0.4× shorter than claw.

PREANAL RING. Without a projection, pilosity marginal.

Male

MANDIBULAR STIPITES. Without lobes.

LEGS. Second pair with ventral pads on postfemur and tibia. Postfemoral pads tiny, tibial pads small on midbody legs. Second pair with coxal pores.

ANTERIOR GONOPODS. ( Fig. 3A, B View Fig ) Slender, basal shaft more than half as broad as distal bowl. Ridge with a terminal projection. Lateral prominence distinct. Bowl slender, rounded-triangular. Apical denticles distinct.

POSTERIOR GONOPODS. ( Fig. 4A, B View Fig ) Mesomerital process almost as long as opisthomerite, straight. Opisthomerite slender, straight. Anterior process short, triangular, pointed. Posterior process longer, slender.

Female

RECEPTACULUM SEMINIS. A stalked sphere (as in Enghoff 1992: fig. 48).

Distribution and habitat

Endemic to Gran Canaria. Known from two caves and three MSS in the east-central part of the island.