Macrocheles gedeensis, Hartini & Dwibadra, 2017

Hartini, Sri & Dwibadra, Dhian, 2017, Macrochelid mites (Acari: Mesostigmata) associated with dung beetles in Mount Gede-Pangrango National Park, West Java, Indonesia, Journal of Species Research 6 (2), pp. 181-189 : 182-183

Macrocheles gedeensis sp. nov. ( Figs. 1-6 )

Type series: Holotype: female ( MZB. Acar.7091.2) 1130 m above sea level (a.s.l.), Selabintana, Mount Gede-Pangrango, Sukabumi, West Java, S 06°52′14″ E 106° 57′09″, 15 May 2010, Hartini and Dwibadra leg., ex Synapsis ritsemae ( Coleoptera : Scarabaeidae ). Paratype: 14$$, other data same as holotype.

Female: Length of dorsal shield 1021 (880-1110), width at level of coxae II 613 (500-690) (n = 15). Specimens reddish brown.

Dorsum ( Fig. 1 ): Dorsal shield oval, attenuated posteri- orly, surface ornamented with distinct reticulate pattern and punctation; lateral margin smooth; shield with 28 pairs of dorsal setae and 22 pairs of pores; setae j1-4

A B C

pilose distally; j5, j6, z1, z5, z6, and J2 simple, but in some cases z1 and z6 slightly pilose; J5 bipectinate entirely; other dorsal setae pilose in distal half to distal 2/3. Venter ( Fig. 2 ): Length of sternal shield, length 192 (170-207.5), width at level of coxae II 167 (150-175) (n = 15); shield ornamented with lines and punctations; linea angulata (l.ang.), two linea arcuata (l.arc.), linea oblique anterior (l.o.a.), linea media transversa (l.m.t.) present and with punctations; l.m.t. not straight; anterior l.arc. faint; linea oblique posteriore (l.o.p.) distinct, with punctation, bifurcated, and connect to l.m.t. Epigynial shield ornamented with arched lines and punctations; shield with a pair of pilose distally setae on posteri- or corner. Length of epigynial shield 180 (162.5-195), width 216 (185-237.5) (n = 15).

Ventrianal shield pentagonal, shield ornamented with semiconcentric line punctations; length 329 (267.5- 370), width 311 (247.5-365) (n = 15); shield with 3 pairs of preanal simple setae, pair of paranal simple setae, and 1 postanal pilose seta. Cribrum located posterior to postanal seta. Ophisthogastric setae simple and pilose. A pair of metapodal shield oblong. Postcoxal pore free from podal shield. Anterior extremities of peritreme located at level of setae z1.

Gnathosoma ( Fig. 3 ): Developed and sclerotized. Epistome ( Fig. 4 ) and chelicera ( Fig. 5 ) fixed digit with simple dorsal seta, robust median tooth, a distal tooth, pilus dentilis and terminal hook; movable digit with bidentate tooth, small distal tooth and terminal hook. Length of fixed digit 259 (225-272.5), and movable digit 105 (100- 112.5) (n = 15).

Legs: Most leg segments with simple, pilose, and plumose setae, except for coxa, trochanter, and tarsus I with simple setae; and coxa, genu IV with pilose setae. Leg length (except ambulacrum, n = 15); leg I, 763 (640- 930); leg II, 720 (580-850); leg III, 738 (680-800); leg IV, 1159 (1040-1260).

Sacculus foemineus: ( Fig. 6 ). Pair of sacculi fused; small cornu rounded distally and sclerotized; spermateca oval. Male and other stage: Unknown.

Etymology: The species name is derived from type locality.

Remarks: This species is very similar to Macrocheles persimilis Hartini, Dwibadra and Takaku, 2007 from Sulawesi, Indonesia, in its dorsal setae and sternal ornamentation. However, Macrocheles gedeensis is distinguishable from M. persimilis by the following characters as shown in Figs. 7 and 8 : (corresponding conditions of M. persimilis in parentheses): 1) epigynial setae pilose (simple); 2) linea oblique posterior (l.o.p.) bifurcated and connected to linea media transversa (l.m.t.) (not bifurcated and disjunct to l.m.t; 3) length of dorsal shield more than 1000 μm (less than 1000 μm).

The species also resembles Macrocheles monticola Takaku and Hartini, 2001 , recorded from Bali, Indonesia in the sternal ornamentation but it differs from the latter in the following characteristics of the female (corresponding conditions of M. monticola in parentheses), 1) epigynial setae pilose (simple), as are shown in Fig. 7 ; 2 ) most of dorsal setae pilose (simple), as are shown in Fig. 9 .

Figures

Figs. 1-6. Macrocheles gedeensis sp. nov., holotype female(MZB.Acar.7091.2). 1, dorsum; 2, venter; 3, ventral view of gnathosoma; 4, epi- stome; 5, chelicerae; 6, sacculus foemineus.

Fig. 7. Epigynial setae of A. Macrocheles gedeensis (pilose distally), B. M. monticola (simple), and C. M. persimilis (simple). Scale bar: a, c=100μm, b=50μm.

Fig. 8. Sternal shield of A. Macrocheles gedeensis with l.o.p. connected to l.m.t. and B. of M. persimilis which is disjunct to l.m.t.

Fig. 9. Dorsal shield of A. Macrocheles gedeensis with pilose setae and B. of M. monticola with simple setae. Scale bar: 100μm.