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Checklist and Key to Species of Carabodes (Acari, Oribatida, Carabodidae) of the Caucasian Region, with Description of a New Species M

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Checklist and Key to Species of Carabodes (Acari, Oribatida, Carabodidae) of the Caucasian Region, with Description of a New Species M Acarina 16 (2): 177–186 © Acarina 2008 CHECKLIST AND KEY TO SPECIES OF CARABODES (ACARI, ORIBATIDA, CARABODIDAE) OF THE CAUCASIAN REGION, WITH DESCRIPTION OF A NEW SPECIES M. Murvanidze I. Javakhishvili Tbilisi State University, Chavchavadze ave. 3, 0179 Tbilisi, Georgia; e-mail: [email protected] ABSTRACT: A revised checklist is presented for the 28 species in the oribatid mite genus Carabodes (Carabodidae) that are known from the Caucasian region, including distributional data and new records from Georgia. An identification key for Caucasian Carabodes species and a table of characters are included. A new species from the West Georgian subtropical region, Carabodes kintrishiana sp.n., is proposed. KEY WORDS: Oribatid mites, Carabodes, Caucasus, Kintrishi Reserve INTRODUCTION MATERIAL AND METHODS FOR C. KINTRISHIANA The oribatid mite genus Carabodes C.L. Koch, 1835 has a nearly world-wide distribution Material of the new species was collected on and includes about 115 named species (Subias 31.07.2005 in Kintrishi Reserve, located in the 2004). These inhabit soil and litter, mosses and li- West Georgian subtropical region of Ajaria. The chens, fungi, the bark of twigs, branches and tree site was a Castanea forest with a few Carpinus trunks, rock surfaces and rotten wood (Reeves and Alnus trees and an understory of Vaccinium 1987; Reeves and Behan-Pelletier 1998). They are myrtillus. Specimens were extracted by modified considered to be panphytophages (unspecialized Berlese-funnels, stored in alcohol and studied in feeders), which explains their ability to inhabit a lactic acid in an open hollow-ground slide. The great diversity of habitats (Reeves 1987). terminology of morphological structures follows The need for a taxonomic revision of the Car- Weigmann (2006). abodes of Georgia was recently noted (Murvanidze SYSTEMATICS and Weigmann 2007) but this is also true of the Family Carabodidae whole Caucasus region, which represents a Genus Carabodes C.L. Koch, 1835 “hotspot” of biodiversity (Meyers et al. 2000) and therefore is of high biogeographical interest. In a Carabodes kintrishiana Murvanidze, sp. n. recent checklist of the Caucasian oribatid fauna Fig. 1. (Shtanchaeva 2001) Carabodes was represented Diagnosis. Large, dark reddish brown, almost by 19 named species and three undetermined spe- black mite. Interlamellar setae — short, ss — cies. The most recent key that includes Carabodes short, clavate, distally barbed. Anterior part of species from this region was that of Bulanova- prodorsum punctuate, posterior part with sclero- Zakhvatkina (1975). After 1975 several new spe- tized ridges. Sculpture of the notogaster composed cies were described (Djaparidze 1990 a, b; Kulijev of heavily sclerotized wrinkles and punctuated. 10 1979; Shtanchaeva 2004; Weigmann and Mur- pairs of smooth, baciliform notogastral setae are vanidze 2003; Murvanidze and Weigmann 2007) present. Dorsosejugal groove is absent. Legs are and relevant new distributional records were pub- typical to the genus. With the general characters of lished (Arabuli and Murvanidze 2003; Murvanidze Carabodes, as given by Weigmann (2006). and Weigmann 2007). Description. Length 670 µm. Color — dark In this paper I present a revised checklist of reddish-brown. the Caucasian Carabodes species, which includes Prodorsum. Rostrum rounded. ro and le setae previously known data on their distribution and are smooth, directed medially. Lamellae typicall new records from Georgia. An identification key to the family: large and wide, joined to the both- for the Caucasian Carabodes species and a table ridia. in setae inserted on the prodorsum, near to of characters (Table 1) are also given. During the lamellar edges, smooth, bacilliform, apically this work a new species of Carabodes was dis- pointed; length approximately 15 µm. Anterior covered in the West Georgian subtropical region, part of the prodorsum is punctuated, posterior part which is described immediately below as C. kin- is made up by sclerotized, irregular ridges. Sen- trishiana sp. n. silli with short peduncle and clavate head, distally 177 Table 1 Characters of Carabodes species known from the Caucasus area Characters body length prodorsal size of in shape of in ss shape dorsosejugal notogastral size of ng shape of ng c2 setae genital setae species (µm) sculpture setae (µm) setae groove sculpture setae (µm) setae areolatus 480–615 areolae 60 long, curved “finger”- absent areolae 40 widened, normal short inside shaped barbed auriculatus 574–689 fine ? short, smooth peduncle absent three longitu- ? baciliform normal minute long, dinal ridges head spinose bidens 540 longitudinal 130 long, strong, “finger”- wide rosette-like 50–60 baciliform long, strong, short ridges erect shaped 110 µm comas 500 longitudinal 15 fine, thin “finger”- absent irregular 20 thin, fine normal ? ridges shaped wrinkles coriaceus 565–725 two chitinized ? lanceolate fusiform wide irregular ? lanceolate normal long elevations ridges M. Murvanidze djaparidzae 510 areolae and 90 long, strong, “finger”- moderately rosette-like 38–50 phylliform long, strong, short 178 irregular ridges erect shaped wide barbed 85 µm dubius 420–517 longitudinal 80 long, strong, “finger”- wide rosette-like 25–30 fusiform, long, strong, short ridges erect shaped barbed 85 µm egregious 400 areolae 50 smooth, erect club-shaped absent areolae 40–50 baciliform normal ? femoralis 600–715 fine ridges 8 short “finger”- absent longitudinal 8–10 short, smooth normal medium size shaped ridges and granulation granulatus 415 areolae, 30 phylliform, “finger”- narrow with areolae, 20–30 phylliform normal short irregular ridges barbed shaped punctate barbed horreo 490 irregular ridges 100 long, erect club-shaped narrow rosette-like 28–35 thick long, strong, short baciliform 75 µm intermedius 480–540 tubercles, 80 long, erect club-shaped narrow rosette-like 35 lanceolate long, strong, short irregular ridges 70 µm kintrishiana 670 with longitudi- 15 baciliform, clavate absent with thick 25 straight, normal minute sp. n. nal ridges, smooth wrinkles, smooth punctate punctate labirinthicus 430–580 irregular ridges 30 straight, serrate clavate absent joint tubercles 30 straight, fine normal short marginatus 470–560 areolae and 40 lanceolate fusiform narrow tubercles 40 lanceolate normal long tubercles Table 1 Continued minusculus 340–385 tubercles 45 smooth, club-shaped absent tubercles 15–25 phylliform normal short baciliform ornatus 540–690 tubercles 50 smooth, fusiform wide tubercles 40 lanceolate normal very long baciliform paraspinosus 374 areolae 60 long, setiform “finger”- narrow areolae 30 phyliform normal short shaped procerus 450–550 nodules, 10 short, smooth rounded to absent nodules, irre- 15 short, fine normal short, fine irregular ridges “finger- gular ridges Checklist andkeytospeciesof shaped” pulcher 450 areolae 45 long, curved club-shaped absent tubercles 10–25 long, thin, normal short, fine erect rugosior 520–650 two tubercles in 10 short, smooth flat to absent one long and 15 short, fine normal short, fine posterior part “finger”- several irregu- shaped lar ridges 179 subarcticus 400–490 areolae 110 long, curved “finger”- absent with areolae, 30 lanceolate normal short shaped punctate tenuis sbsp. 480 tubercles, lon- 85 long, setiform club-shaped narrow tubercles 40 long, setiform normal short longisetosus gitudinal ridges Carabodes scopulae 467–637 tubercles, 95–116 long, erect “finger”- narrow separated 48–53 distally 95–110 µm short irregular ridges shaped rosettes widened tarbae 475–635 areolae, 100–120 long, erect “finger”- narrow rosette-like 55–57 slightly 100–120 µm minute irregular ridges shaped widened or baciliform willmannii 310–450 areolae 30 baciliform, club-shaped absent tubercles 15–20 lanceolate normal short smooth schatzi 310–385 tubercles 30 baciliform, club-shaped absent tubercles 17–25 thin, short normal short smooth M. Murvanidze a c b Fig. 1. Carabodes kintrishiana sp. n.: a — dorsal view; b — ano-genital region; c — notogastral sculpture. Scale bar 100 µm (for a, b). The figure shows holotype. Some setae on the notogaster are broken and indicated only by their alveoli. slightly barbed. Dorsosejugal groove is absent of ad setae. It differs from C. labyrinthicus in the (Fig. 1a). following characters: (7) Length of C. labyrinthi- Notogaster. Sculpture of the notogaster is cus varies from 430–580 µm (Pérez-Iñigo 1997; made up by strongly sclerotized, thick, intercon- Weigmann 2006). C. kintrishiana is much larger nected, punctuated transverse wrinkles (Fig. 1c). at 670 µm. (8) The notogastral sculpture of C. 10 pairs of notogastral setae smooth and bacilli- labyrinthicus is made of rounded, joint tubercles form, apically pointed, with their length about 25 that form short, irregular transverse ridges. Sculp- µm (Fig. 1a). turing of C. kintrishiana is made up by strongly Ventral region. Surface is covered by strongly sclerotized, thick, transverse, interconnected, chitinized, finely punctuated wrinkles around the punctuated wrinkles, (9) in setae of C. kintrishi- ano-genital region. Epimeral seta formula is: ana are shorter (15 µm), than those of C. labyrin- 3:1:2:3. Genital seta formula — 4g: 1ag: 2a: 3ad. thicus (30 µm). The genital and anal plates are finely punctuated. Carabodes comas Kulijev, 1979 is similar to Genital, aggenital and anal setae are minute; ad C. kintrishiana in regard of the type of notogastral setae smooth, fine, bacilliform, apically pointed sculpture (sclerotized wrinkles), but the wrinkles (Fig. 1b). of C. comas are thin
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