Miopsalis dillyi, Schmidt & Clouse & Sharma, 2020

Schmidt, Stephanie M., Clouse, Ronald M. & Sharma, Prashant P., 2020, A new Miopsalis from Mindanao supports a biogeographic umbilicus between Borneo and the southern Philippines (Arachnida: Opiliones: Cyphophthalmi: Stylocellidae), Zootaxa 4779 (3), pp. 379-390 : 381-385

publication ID

https://doi.org/ 10.11646/zootaxa.4779.3.6

publication LSID

lsid:zoobank.org:pub:862021E2-6D2B-4996-9A11-C4C73CAC15FD

DOI

https://doi.org/10.5281/zenodo.3851678

persistent identifier

https://treatment.plazi.org/id/EA162D12-566E-415B-9658-A9C28CD53218

taxon LSID

lsid:zoobank.org:act:EA162D12-566E-415B-9658-A9C28CD53218

treatment provided by

Plazi

scientific name

Miopsalis dillyi
status

sp. nov.

Miopsalis dillyi View in CoL sp. nov.

( Figs. 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 , Tables 1–2)

Types. Male holotype (NMP) from Center for Environmental Development and Recreation (CEDAR), Impalutao, Impasug-ong, Bukidnon Province, Mindanao I., Philippines, 767 m alt. (8.254894°N, 125.035732°E), leg. D. Mohagan, D.J.B. Mohagan, V. Yamba, D.E.M. General, R.M. Clouse, 3 July 2014, from sifted leaf litter. Two male (both dissected for genitalia) and one female paratypes in 96% EtOH (MCZ 154598), same collecting data as for holotype; 1 male mounted on SEM stubs ( MCZ 154599 View Materials ), same collecting data as for holotype . One male and 2 female paratypes in 96% EtOH ( MCZ 154600 View Materials ) from Center for Environmental Development and Recreation ( CEDAR), Impalutao , Impasug-ong , Bukidnon Province, Mindanao I., Philippines, 775 m alt. (8.254933°N, 125.035749°E), leg. D. Mohagan, V. Yamba, R. M. Clouse, 30 June 2014, from sifted leaf litter. One male and GoogleMaps 2 female paratypes in 96% EtOH ( MHNG) from Center for Environmental Development and Recreation ( CEDAR), Impalutao, Impasug-ong , Bukidnon Province, Mindanao I., Philippines, 775 m alt. (8.254933°N, 125.035749°E), leg. D. Mohagan, V. Yamba, R. M. Clouse, 30 June 2014, from sifted leaf litter. One male paratype (1 dissected for genitalia) in 96% EtOH ( MCZ 154601 View Materials ) from western slope of Mt. Kitanglad , Lantapan, Kaatoan GoogleMaps , Bukidnon Province, Mindanao I., Philippines, 1300 m alt. (8.072258°N, 125.008909°E), leg. A. Mohagan, D. Mohagan, D.J.B. Mohagan, V. Yamba, R. M. Clouse, 1 July 2014, from sifted leaf litter. Two female paratypes (extracted for DNA) in 96% EtOH ( MCZ 154602 View Materials ) and GoogleMaps 1 female paratype on SEM stubs ( MCZ 154603 View Materials ), from western slope of Mt. Kitanglad , Lantapan, Kaa- toan , Bukidnon Province, Mindanao I., Philippines, 1300 m alt. (8.072258°N, 125.008909°E), leg. A. Mohagan, D. Mohagan, D.J.B. Mohagan, V. Yamba, R. M. Clouse, 1 July 2014, from sifted leaf litter GoogleMaps .

Additional material studied. Three juveniles (1 extracted for DNA; MCZ) in 96% EtOH from Center for Environmental Development and Recreation ( CEDAR), Impalutao, Impasug-ong, Bukidnon Province, Mindanao I., Philippines, 775 m alt. (8.254933° N, 125.035749° E), leg. D. Mohagan, V. Yamba, R. M. Clouse, 30 June 2014, from sifted leaf litter GoogleMaps .

Etymology. The specific epithet honors the invertebrate physiologist Geoffrey Fowler Dilly.

Diagnosis. Medium-sized (ca. 3.6 mm) Cyphophthalmi presenting a character combination diagnostic for Miopsalis : distinct eyes, anal gland pore and Rambla’s organ present, distinct sternum, extensive sculpturing on second cheliceral article, nearly parallel ventral opisthosomal sulci, nearly straight posterior margin of gonostome, and coxae II and IV each with distinct meeting points in males. Male also with distinct solea on tarsus I; presence of digiti of the gonopore complex; and arrangement of five ventral microtrichia of spermatopositor, with one proximal microtrichium on ventral midline and four subdistal microtrichia arranged in an arc. Distinguished from congeners by unique combination of medium size, and presence of anal gland pore, eyes, Rambla’s organ, prominent second ventral cheliceral process, and claw-like chelicerae. For example, M. mulu ( Shear, 1993) and M. sabah ( Shear, 1993) are also medium-sized and have anal gland pores, but they have attenuate chelicerae and no Rambla’s organ; M. gryllospeca ( Shear, 1993) has a small Rambla’s organ, claw-like chelicerae, and a large second ventral cheliceral process, but lacks an anal gland pore and is considerably larger (> 5 mm) (see table 1 and figure 19 in Clouse 2012 for further comparison).

Description. Length of holotype (female paratype in parentheses) 3.64 (3.59); maximum body width 1.93 (1.84) at third opisthosomal segment; length/width ratio 1.88 (1.95). Distance between ozopores, 1.67 (1.61) ( Fig. 1 View FIGURE 1 )

Body oval, dark orange-coloured to reddish brown (in alcohol) depending on incidence of light ( Fig. 1 View FIGURE 1 ). Body almost entirely with a dense tuberculate-microgranulate surface microstructure. Distinct eye lenses anterior to Type I ozophores ( Juberthie 1970; see also Giribet 2003) ( Fig. 1C, F View FIGURE 1 ). Mid-dorsal, longitudinal opisthosomal sulcus absent (male; Fig. 1A View FIGURE 1 ) or poorly defined (female; Fig. 1D View FIGURE 1 ). Posterior end of body evenly rounded. Coxae of leg II fused to coxae of legs III and IV ( Fig. 2A, 2B View FIGURE 2 ). Sternum present ( Fig. 2A, 2B View FIGURE 2 ). Proximal end of coxae I or III of males not meeting along the midline (in females, only coxae II meeting in midline; Fig. 2A, B View FIGURE 2 ). Male gonostome semicircular to trapezoidal, with weakly concave posterior edge, without cuticular projections ( Fig. 2A View FIGURE 2 ). Spiracles C-shaped ( Fig. 2A, B View FIGURE 2 ). Sternal opisthosomal glands absent. Sternites 8 and 9 and tergite IX free. Tergite IX of male distinctly bilobed. Anal plate of male with indistinct, raised, medial, longitudinal area lacking granulation, with shallow medial groove posteriorly ( Fig. 2C, D View FIGURE 2 ). Anal gland pore present in male ( Fig. 2C View FIGURE 2 ).

Chelicerae ( Fig. 3A View FIGURE 3 ) not of the protruding type ( Giribet 2003) and claw-like (Clouse 2012), distal article/median article ratio 0.32 (0.31); widest part of median cheliceral article near the base and with ornamentation concentrated proximally; proximal article with dorsal crest and two distinct ventral processes. Palpal trochanter without ventral process ( Fig. 3B View FIGURE 3 ). Legs with all metatarsi and tarsi ornamented; claws of all legs smooth ( Fig. 3 View FIGURE 3 C–K). Tarsus I with a distinct solea ( Fig. 3D, J View FIGURE 3 ). Rambla’s organ of male small, oval in shape, in distal portion of tarsus IV adjacent to tarsal claw ( Fig. 3I View FIGURE 3 ). Adenostyle conspicuous, subtriangular, robust, fringing at the tip; located in proximal half of tarsus ( Fig. 3I View FIGURE 3 ). Appendage measurements provided in Tables 1–2.

Spermatopositor ( Fig. 4 View FIGURE 4 ), examined in three male paratypes, in dorsal view with eight long microtrichia on each side, their bases separated at midline. Dorsal microtrichia without serration ( Fig. 4A View FIGURE 4 ). Ventral side with small denticles and five microtrichia, i.e. one proximal microtrichium on the ventral midline and four subdistal microtrichia arranged in an arc ( Fig. 4B View FIGURE 4 ). Gonopore complex with a pair of long and gracile digiti ( Fig. 4C View FIGURE 4 ).

Variation. Range of measurements of males (n=4) and females (n=6, in parentheses): Body length 3.48–3.79 (3.59–3.85), maximum width 1.82–1.96 (1.84–1.94).

Distribution. Known only from the two localities provided.

V

Royal British Columbia Museum - Herbarium

R

Departamento de Geologia, Universidad de Chile

MHNG

Museum d'Histoire Naturelle

MCZ

Museum of Comparative Zoology

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Opiliones

Family

Stylocellidae

Genus

Miopsalis

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