Troglosiro longifossa, Sharma, Prashant & Giribet, Gonzalo, 2005

Sharma, Prashant & Giribet, Gonzalo, 2005, Troglosironidae) from New Caledonia, Zootaxa 1053, pp. 47-60: 49-57

publication ID

http://doi.org/ 10.5281/zenodo.170049

persistent identifier

http://treatment.plazi.org/id/03EF87C2-FF8C-FF8B-153E-FE95406DFB97

treatment provided by

Plazi

scientific name

Troglosiro longifossa
status

sp. nov.

Troglosiro longifossa   sp. nov.

Figs. 1–35 View FIGURES 1 – 3 View FIGURES 4 – 9 View FIGURES 10 – 16 View FIGURES 17 – 25 View FIGURES 26 – 30 View FIGURES 31 – 35

Types. Male holotype ( MNHN [ex MCZ DNA 100867]) from Gîte Kanua (S 22 ° 21 ’, E

166 º 58 ’), Port Boisé, New Caledonia, 20 m elevation, collected 21 November 2001 by G.B. Monteith (Queensland Museum Berlesate 1043, from sieved rainforest litter). 2 male (1 dissected for genitalia, 1 used for DNA extraction following the non­destructive protocol described in Boyer et al. 2005) and 4 female (2 dissected for genitalia) paratypes ( MCZ 65204 View Materials [ex MCZ DNA 100867]), same collecting data as holotype; 1 male and 1 female paratypes mounted on SEM stubs ( MCZ 65206 View Materials , 65207, 65208), same collecting data as holotype. 1 male paratype ( MCZ 62505 View Materials ) from a human dung trap, Gîte Kanua (S 22 ° 21 ’, E 166 º 58 ’), Port Boisé, New Caledonia, 20 m elevation, collected 28–29 January 2002 by G.B. Monteith. 1 female paratype ( MCZ 51944 View Materials [ex MCZ DNA 101587]), same locality as holotype, collected 18 November 2002 by G.B. Monteith (Queensland Museum Berlesate 1087, from sieved rainforest litter).

Additional material studied. 3 females and 3 juveniles ( MCZ DNA 100867), same collecting data as holotype.

Material examined for comparison. T. aelleni Juberthie, 1979: 2   syntypes (1 male and 1 juvenile) ( MHNG) from the Grotte d’Adio, New Caledonia, collected 2 April 1977 by Aellen & Strinati.

T. raveni Shear, 1993: 3   male paratypes and 3 juveniles ( FMNH) from Col des Roussettes, near Bourail, New Caledonia, 500 m elevation, collected 7 August 1978 by S. and J. Peck; 1 female paratype ( FMNH) from Berlese of litter from dry forest, Col des Roussettes, New Caledonia, 490 m elevation, collected 29 May 1987 by N.I. Platnick and R. Raven.

T. juberthiei Shear, 1993: 6   male and 2 female paratypes ( FMNH) from Berlese of litter from montane forest, Riviere Bleue, New Caledonia, 280 m elevation, collected 21 May 1987 by N.I. Platnick and R. Raven.

T. platnicki Shear, 1993: 3   male and 6 female paratypes, and 4 juveniles ( FMNH) from Col de Mouirange, 30 km East of Noumea, New Caledonia, collected 30 August 1978 by S. and J. Peck (FM[HD]# 78­260, from Berlese of leaf litter near pond).

Comparative specimens from 6 other morphospecies not decribed at present.

Etymology. The specific epithet, an invariable noun in apposition, refers to the length of the sternal opisthosomal depression in the males of this species. Derived from Latin, longus meaning long, and fossa meaning ditch, trench or channel.

Diagnosis. Troglosironid with distinct opisthosomal ventral depression along the midline extending from sternites 3 through 7, widest and deepest in sternite 5. Two pairs of sternal exocrine gland pores arranged in parallel across the edges of sternal depression delimiting the anterior and posterior portion of opisthosomal sternite 3 ( Figs. 10–11 View FIGURES 10 – 16 ). Proximal article of chelicerae with dorsal crest ( Fig. 13 View FIGURES 10 – 16 ); distal article of chelicerae with regular dentition ( Fig. 14 View FIGURES 10 – 16 ). Penis with four ventral microtrichia; six dorsal microtrichia with bases distant from the midline of the penis ( Figs. 31–32 View FIGURES 31 – 35 ).

Description. Total length of male holotype (female paratype [ MCZ 65204 View Materials ] in parentheses) 1.86 (1.81), width across ozopores 0.95 (0.89), greatest width 1.06 (1.01) between second and third opisthosomal segments ( Figs. 1–3 View FIGURES 1 – 3 ); length­width ratio 1.75 (1.79).

Body oval, dark orange to reddish brown (in alcohol) depending on incidence of light. Body almost entirely with a dense tuberculate­microgranulate surface microstructure.

Ozophores conical, of type 2 according to Juberthie (1970; see a re­definition of the types of ozophores in Giribet 2003). Eyes absent ( Fig. 15 View FIGURES 10 – 16 ). Transverse opisthosomal sulci and mid­dorsal longitudinal opisthosomal sulcus inconspicuous ( Fig. 1 View FIGURES 1 – 3 ). Posterior end of body evenly rounded. Opisthosomal sternites 3 through 7 deeply depressed along the midline without forming lateral rims on both sides of the depression ( Figs. 3 –4 View FIGURES 1 – 3 View FIGURES 4 – 9 , 10 View FIGURES 10 – 16 ). Depression widest and deepest in sternite 5, terminating abruptly at the anterior end of sternite 7, and features a few scattered setae. Two pairs of sternal pores aligned in parallel on the edge of sternal depression, delimiting the anterior and posterior portion of opisthosomal sternite 3, not on midline ( Fig. 11 View FIGURES 10 – 16 ). Female opisthosomal sternites without modifications ( Fig. 5 View FIGURES 4 – 9 ).

Coxae of legs I and II movable, coxae of legs III and IV fused ( Figs. 6–7 View FIGURES 4 – 9 ). Ventral prosomal complex of male with coxae of legs II and IV meeting in the midline, but coxae I and III not so ( Fig. 6 View FIGURES 4 – 9 ). Sternum absent. Gonostome ovoid, width greater than length. Ventral prosomal complex of females with only coxae II meeting in the midline ( Fig. 7 View FIGURES 4 – 9 ).

Spiracles ( Fig. 12 View FIGURES 10 – 16 ) in the shape of a closed circle. Opisthosomal sternites 8 and 9 and tergite IX fused in males and females, forming a corona analis ( Figs. 8–9 View FIGURES 4 – 9 ). Anal plate without modifications. Anal plate 0.17 (0.16) long and 0.24 (0.23) wide. Anal gland pores absent.

Chelicerae ( Fig. 13 View FIGURES 10 – 16 ) slightly protruding, with the dorsal crest visible from above ( Figs. 1–2 View FIGURES 1 – 3 ); relatively stocky; with few setae. Granulation restricted to the proximal article, covering part of the surface between the dorsal crest and the anterior terminus. Proximal article of paratype used for SEM 0.56 long, 0.23 deep, with relatively small dorsal crest and single (posterior) ventral process. Second article 0.70 long, 0.14 deep, widest near the middle of its length. Distal article 0.23 long, 0.05 deep. Dentition uniform ( Fig. 14 View FIGURES 10 – 16 ).

Palp ( Fig. 16 View FIGURES 10 – 16 ) without ventral process on proximal end of trochanter; without conspicuous modifications. Length/width (length­width ratio in parentheses) of palpal articles from trochanter to tarsus of male paratype used for SEM: 0.21 / 0.08 (2.6); 0.33 / 0.07 (4.7); 0.23 / 0.08 (2.9); 0.26 / 0.07 (3.7); 0.23 / 0.07 (3.3); total length 1.26. Palpal claw 40 µm long.

Legs ( Figs. 17–20 View FIGURES 17 – 25 ) robust; surface of all trochanters, femora, patellae, tibiae and metatarsi thickly and uniformly granulated.

Leg measurements of male paratype ( MCZ 65204 View Materials ): length/width (length­width ratio in parentheses):

Tr Fe Pa Ti Mt Ta Total

Leg I 0.17 / 0.16 (1.1) 0.39 / 0.15 (2.6) 0.25 / 0.15 (1.7) 0.30 / 0.17 (1.8) 0.23 / 0.13 (1.8) 0.40 / 0.17 (2.3) 1.74

Leg II 0.15 / 0.14 (1.1) 0.33 / 0.13 (2.5) 0.21 / 0.14 (1.5) 0.26 / 0.17 (1.5) 0.19 / 0.11 (1.7) 0.29 / 0.12 (2.4) 1.43

Leg III 0.15 / 0.13 (1.2) 0.28 / 0.14 (2.0) 0.17 / 0.15 (1.1) 0.24 / 0.17 (1.4) 0.16 / 0.12 (1.3) 0.23 / 0.11 (2.1) 1.23

Leg IV 0.18 / 0.14 (1.3) 0.32 / 0.16 (2.0) 0.23 / 0.16 (1.4) 0.31 / 0.19 (1.6) 0.20 / 0.14 (1.4) 0.26 / 0.13 (2.0) 1.50 Leg measurements of female paratype ( MCZ 65204 View Materials ): length/width (length­width ratio in parentheses):

Tr Fe Pa Ti Mt Ta Total

Leg I 0.16 / 0.16 (1.0) 0.38 / 0.14 (2.7) 0.24 / 0.15 (1.6) 0.30 / 0.15 (2.0) 0.19 / 0.13 (1.5) 0.33 / 0.15 (2.2) 1.60

Leg II 0.12 / 0.13 (0.92) 0.33 / 0.13 (2.5) 0.21 / 0.14 (1.5) 0.25 / 0.15 (1.7) 0.20 / 0.11 (1.8) 0.27 / 0.11 (2.5) 1.38

Leg III 0.14 / 0.13 (1.1) 0.28 / 0.14 (2.0) 0.19 / 0.15 (1.3) 0.24 / 0.15 (1.6) 0.16 / 0.11 (1.5) 0.24 / 0.11 (2.2) 1.25

Leg IV 0.17 / 0.14 (1.2) 0.35 / 0.14 (2.5) 0.21 / 0.15 (1.4) 0.26 / 0.15 (1.7) 0.19 / 0.11 (1.7) 0.26 / 0.11 (2.4) 1.44 Tarsi ( Figs. 21–25 View FIGURES 17 – 25 ) of all legs not appreciably ornamented. Tarsus I with a distinct solea ( Fig. 21 View FIGURES 17 – 25 ); ventral concentration of setae not significant in other legs. Tarsus IV of males not divided, carrying a lamelliform adenostyle close to most basal region of tarsus ( Fig. 24 View FIGURES 17 – 25 ). Adenostyle 60 m long, slightly curved, and acutely triangular ( Fig. 30 View FIGURES 26 – 30 ). Tarsus IV of female without modifications ( Fig. 25 View FIGURES 17 – 25 ). Tarsal claws I and IV smooth; tarsal claw II comb­like, with a special prolateral row of tooth­like projections; tarsal claw III with a pair of small lateral pegs near its thickest portion ( Figs. 26–29 View FIGURES 26 – 30 ).

Penis ( Figs. 31–32 View FIGURES 31 – 35 ) typical of troglosironids, with four ventral microtrichia; three dorsolateral microtrichia on each side; and six dorsal microtrichia, innermost pair somewhat distant from the midline. Apical microtrichia typical for genus, with enlarged and toothed bases fused in pairs. Ventral plate with gonopore large, semicircular, and toothed at the margin. Movable fingers with laterally protruding basal lobes and toothed margins.

Ovipositor ( Figs. 33–35 View FIGURES 31 – 35 ) composed of two apical lobes and 24 circular articles (two ovipositors studied), each article with eight equally long setae. Two terminal articles before apical lobes longer than remaining articles; setae on second terminal article ca. three times longer than more proximal setae; setae on terminal articles also longer. Each apical lobe carrying a long terminal seta, a shorter subterminal seta, and a bi­ or trifurcated sensitive process. Receptacula seminis situated in an elongate chamber in the proximal half of each apical lobe.

Variation. Range of measurements in males (n= 4) and females (n= 8; in parentheses): Body length 1.72–1.81 (1.76–1.86), maximum width 1.01–1.06 (1.00– 1.06).

Distribution. Known only from the type locality.

MNHN

Museum National d'Histoire Naturelle

MCZ

Museum of Comparative Zoology

DNA

Department of Natural Resources, Environment, The Arts and Sport

MHNG

Museum d'Histoire Naturelle

FMNH

Field Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Troglosironidae

Genus

Troglosiro

Loc

Troglosiro longifossa

Sharma, Prashant & Giribet, Gonzalo 2005
2005
Loc

T. raveni

Shear 1993: 3
1993
Loc

T. juberthiei

Shear 1993: 6
1993
Loc

T. platnicki

Shear 1993: 3
1993