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Neolabidophorus Yucatanensis Gen. Et Sp. N. and a New Record for Dermacarus Ornatus Fain, 1967

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Neolabidophorus Yucatanensis Gen. Et Sp. N. and a New Record for Dermacarus Ornatus Fain, 1967 University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Mammalogy Papers: University of Nebraska State Museum Museum, University of Nebraska State 8-1-1974 Neolabidophorus yucatanensis gen. et sp. n. and a New Record for Dermacarus ornatus Fain, 1967 (Acarina: Glycyphagidae) from Heteromys gaumeri Allen and Chapman, 1897, Gaumer's Spiny Pocket Mouse (Rodentia: Heteromyidae) Danny B. Pence Texas Tech University School of Medicine Hugh H. Genoways University of Nebraska - Lincoln, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/museummammalogy Part of the Zoology Commons Pence, Danny B. and Genoways, Hugh H., "Neolabidophorus yucatanensis gen. et sp. n. and a New Record for Dermacarus ornatus Fain, 1967 (Acarina: Glycyphagidae) from Heteromys gaumeri Allen and Chapman, 1897, Gaumer's Spiny Pocket Mouse (Rodentia: Heteromyidae)" (1974). Mammalogy Papers: University of Nebraska State Museum. 54. https://digitalcommons.unl.edu/museummammalogy/54 This Article is brought to you for free and open access by the Museum, University of Nebraska State at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Mammalogy Papers: University of Nebraska State Museum by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. THE JOURNAL OF PARASITOLOGY Vol. 60, No. 4, August 1974, p. 712-715 NEOLABIDOPHORUS YUCATANENSIS GEN. ET SP. N. AND A NEW RECORD FOR DERMACARUS ORNATUS FAIN, 1967 (ACARINA: GLYCYPHAGIDAE) FROM HETEROMYS GAUMERI ALLEN AND CHAPMAN, 1897, GAUMER'S SPINY POCKET MOUSE (RODENTIA: HETEROMYIDAE) Danny 6. Pence* and Hugh H. Genowaysf ABSTRACT: TWO species of hypopial nyrnphs of mites of the family Glycyphagidae were recovered from Heterorn!l.s gatlrneri froin Yucatan, hlexico. Numerous specimens of a hypopus identified as Dermacaru.~ ornattl.~Fain were recovered from the hair and skin. A single specimen of an endo- parasitic hypopus identified as a new genus and species, Neolabidophort~s!/z~catanensis, was recovered from the hair follicles. The new genus differs from similar forms of the subfamily Metalabidophorinae in having a rudimentary clasper organ represented by a median sclerite behind legs IV without external serrated claspers, structure and slightly dorsal position of the tarsal solenidia on legs I and 11, and a modified pair of subpalposoinal setae on the median venter. Hypopial nymphs of mites of the family IV. Two pairs subpalposomal setae (Ve?) located Glycyphagidae were recovered from Gaumer's posteriorly to palposoma on venter. A pair of strong setae on tibiae I and 11, one on genua I and spiny pocket mouse, Heteromys gaumeri, from 11, and one on femur 11. A single barbed flattened Yucatan, hlexico. Numerous specimens, repre- seta on tibia 111, genu 111, and tibia IV. Palpo- senting a new host record, of Dermacarus soma with a pair of barbed setae. Claws I and I1 omatus Fain were recovered from the skin long and fine, curved at tip. Claws of tarsus 111 and hair. Also, a new endoparasitic genus and straight. Yo setae seen on dorsal idiosoma. Tarsal chaetotaxy: 4-4-8-3. Tibia1 chaetotaxy: 4-4-2-1. species, Neolabidophorus yucntanensis, is de- Type species: Neolabidophorz~svucatanensis sp. scribed from the hair follicles of this host. n. In the following description all measure- ments are in microns. Drawings were made Neolabidophorus yucatanensis sp. n. with the aid of a camera lucida. Setal designa- (Figs. 1-6) tions follow those outlined by Fain (1969). H!l~~opr~s(description based on a single speci- men, the holotype) : Body small, cylindrical, white. Neolabidophorus gen. n. Idiosoma 554 long, 285 wide (maximum). An- terior dorsal cuticle punctate, remainder of dorsal Family Glycyphagidae Berlese, 1887, Subfamily cuticle finely punctate, venter punctate in area of Metalabidophorinae Fain, 1967. palposoma and epimera and epimerites, remainder Definition: Known only from the hypopus. Hair of cuticle smooth. Dorsal sejugal furrow not seen. organ median, behind legs IV, well sclerotized, Coxosternal skeleton of legs I to IV well developed. rudimentary, without serrated claspers, apparently Epimera I fused into a "I"' forming well-de- nonfunctional. Genital suckers displaced laterally veloped sternum, epinlera I 57 long, sternum 56 with their posteriors diverging outward. A sec- long. Epimera I1 free, 85 long. Epimerite I1 ondary sclerot~zed plate located posteriorly on free. Epimera I11 and IV open and well sclero- ventral surface. Epimera I well developed, fused, tized. Genital suckers widely separated, divergent forming well-developed sternum. Epimera I1 posteriorly, 33 long. Hair organ rudimentary with strong. Tarsus I11 considerably longer than tarsus several ridgelike structures but without hair claspers, probably nonfunctional, located just be- Received for publication 25 January 1974. hind genital suckers. A secondary sclerotized plate * Department of Veterinary and Zoological Medi- on ventral opisthosoma posterior to the hair clasp- cine, Texas Tech University School of Xledicine. ing organ extending a very short distance into 1 The hluseum, Texa\ Tech University, Lubbock, dorsal opisthosoma. Palposoma with 1 pair short Texas 79409. solenidia and a single pair of spinous setae. One FIGURES1-(i. ~'eolahitlophortrr yitcatanensis gen. et sp. n. hypopus. 1. \'enter. 2. Dorsum. 3-6. Talsi, tibiae, genua, and femora of legs I, 11, 111, and IV, respectively. PENCE AND GENOWAYS-NEW MITE FROM GAUMER'S SPINY POCKET MOUSE, YUCATAN 713 714 THE JOURNAL OF PARASITOLOGY, VOL. 60, NO. 4, AUGUST 1974 pair subpalposomal setae barbed; one pair smaller, I and 11. Other distinguishing characteristics smooth. No setae seen on dorsal idiosoma, setae ga of the new genus are the apparent lack of absent on venter, gm present on genital suckers. dorsal setation and the occurrence of a pair Legs I, 11, 111, and IV 94, 98, 83, and 47 long, respectively. Tarsi I and I1 terminating distally of setae in close proximity to the epimera on in a single curved claw 5 to 7 long. Tarsus I11 the ventral anterior opisthosoma. terminating in a single long straight spinelike claw. Tarsus IV without claws, with a single long Dermacarus ornatus Fain, 1967 tem~inalmacroseta without serrations. Chaetotaxy Fain, 1967, Acarologia 9: 415. of legs: Tarsus 4-4-8-3. Tibia 4-4-2-1. Genu New host record: Numerous hypopi from 2 1-2-1-0. Femur 1-1-1-0. Trochanter 0-0-0-1. Heteromys gaumeri collected 3 km north of Pist6 Terminal setae of tarsi I and I1 flattened, blade- and 2 km east of Chichbn-Itzi, Yucatin, Mexico, like. A pair of large conical spinelike setae on respectively. tibiae I and I1 20 to 27 long, a single similar seta on genua I and I1 and femur I1 16 to 17 long. Remarks A single large flattened serrated or barbed seta These specimens appear identical to those on tibia and genu I11 28 to 31 long and a smaller described as Dermacarus ornatus by Fain conical seta on tibia IV serrated on one side. Re- (1967) from Heteromys anomalus from Trini- maining setae long and whiplike or short and spinelike. Solenidiotaxy: Trochanters, femora, dad and South America. Indeed, the same genua, tibiae, and tarsi I11 and IV devoid of species of hypopus would be expected from solenidia. Tarsus I with 2 (wl and w,) solenidia such closely related hosts of the same genus. and tarsus I1 with 1 (w~)solenidion 9, 16, and 13 long, respectively. DISCUSSION Adults, larva: Unknown. The relationships of the host of Neolabido- Host: Heteromys gaumeri, Gaumer's spiny pocket mouse. phorus to the hosts of the closely related genera Location: Endoparasitic in the hair follicles. Metalabidophorus and Microlabidopus would Pathology : None apparent. support the generic distinctness of Neolubido- Locality: 3 km north of Pistb, Yucatkn, Mexico. phorus. Heteromys gaumeri (host of Neo- Holotype: USNM, Natural History, Acarology labidophorus) is a member of the family Collection. No. 3597. Heteromyidae [superfamily Geomyoidea, sub- Remarks order Myomorpha, order Rodentia (Romer, Representative genera of the subfamily 1966)], whereas Spalax microphthalmus (host Metalabidophorinae are known only from the of Metalabidophorus) is of the family Spalaci- hypopial stage. The subfamily as described dae (superfamily Spalacoidea, suborder Myo- by Fain ( 1967) is a very heterogeneous group morpha, order Rodentia) , and Aplodontia rufa representing several divergent genera. The new (host of Microlabidopus) is a member of the genus Neolubidophorus appears to have closest family Aplodontidae ( superfamily Aplodontoi- affinities with Metalubidophorus and Micro- dea, suborder Sciuromorpha, order Rodentia) . lubidopus both of which have the hair organ Therefore, members of the genus Heteromys reduced to an apparently nonfunctional struc- are related to one of these hosts at the sub- ture (reduced to a sclerotized plate without ordinal level and the other at the ordinal claspers in the new genus), the presence of a level indicating a high degree of phylogenetic secondary plate posterior to the hair organ (on distinctness of the hosts of these three genera the dorsal surface in the above two genera), of mites. the widely divergent genital suckers in all Ecologically and geographically the three three genera, and similar leg chaetotaxy and host genera are also extremely diverse (Hall and Kelson, 1959; Walker et al., 1964). The solenidiotaxy. The new genus is distinguished genus Heteromys occurs in the Neotropical from the above and others of the family by region from Veracruz, Mexico to northern the rudimentary and highly modified structure South America. Within this region Heteromys of the hair organ without claspers, ventral generally inhabits wet forest, although Het- location of the secondary sclerotized plate eromys gaumeri occurs in lowland dry forest posterior to the hair organ, different form of and thorn forest. Members of the genus Spalux the genital suckers, and the highly modified are the blind mole-rats of eastern Mediter- spinelike setae on the tibiae and genua of legs ranean, eastern Europe, Asia Minor, and PENCE AND GENOWAYS-NEW MITE FROM GAUMER'S SPINY POCKET MOUSE, YUCATAN 715 southern Russia.
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