Research Article |
Corresponding author: Michael W. Hastriter ( michaelhastriter@comcast.net ) Academic editor: Terry Galloway
© 2017 Roxana Acosta, Michael W. Hastriter.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Acosta R, Hastriter MW (2017) A review of the flea genus Phalacropsylla Rothschild, 1915 (Siphonaptera, Ctenophthalmidae, Neopsyllinae, Phalacropsyllini) with new host and distributional records. ZooKeys 675: 27-43. https://doi.org/10.3897/zookeys.675.12347
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A redescription of the genus Phalacropsylla Rothschild is provided. Six species are recognized: Phalacropsylla allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild. Phalacropsylla hamata is designated herein as a junior synonym of P. paradisea. The distribution of P. paradisea is more extensive than previously thought, extending from Arizona through southern Colorado, into New Mexico, Texas, and northern Mexico (State of Nuevo León). It is the least host-specific of all species of Phalacropsylla, occurring on 13 different host species including cricetid, heteromyid, murid, and sciurid rodents and several carnivores, although it most commonly occurs on Neotoma albigula Hartley. The range of P. oregonensis is expanded from eastern Oregon to southeastern Idaho. Numerous records are documented for the most common and ubiquitous species, P. allos, which is found in British Columbia, central to northern California, Idaho, Montana, Colorado, Nevada, Utah, Wyoming, Arizona, and New Mexico. Neotoma cinerea Ord is the principal host of P. allos. Phalacropsylla allos is a winter flea west of the Rocky Mountains, but it has been reported in warmer months of the year on the eastern slopes of the Rocky Mountains in Larimer County, Colorado. A distribution map and key are provided for all species in the genus Phalacropsylla.
Host-parasite relationships, flea key, new synonymy, Phalacropsylla distribution
The flea genus Phalacropsylla Rothschild, (Neopsyllinae: Phalacropsyllini) is represented by six species (P. allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild). Recent phylogenetic studies based on morphology and molecular characters found that the tribe Phalacropsyllini may be divided in two genera: Phalacropsylla and Strepsylla Traub the former in western North America, the latter in Central America (
Specimens were obtained on loan from the following institutions: Brigham Young University flea collection, Monte L. Bean Life Science Museum, Brigham Young University, Provo, Utah, USA (
The most stable and representative characters for the genus Phalacropsylla are found in the modified abdominal segments of the male [T-IX (basimere and telomere), distal arm of S-IX, and the aedeagus]. The majority of Phalacropsylla listed under “Materials Examined” that are listed as part of the
Phalacropsylla Rothschild, 1915: 39; Ewing, 1924: 346, 1930: 173; Jordan, 1937: 268; Ewing & Fox, 1943: 85; Hubbard, 1947: 338; Traub, 1950: 76; Hopkins & Rothschild, 1962: 299; Eads & Campos, 1982: 243–244; Holland, 1985: 125.
Phalacropsylla paradisea Rothschild, 1915, Paradise [Cochise County], Arizona, off Epimys sp. [= Rattus], Mus sp., and civet cat, collected in September, October, November, and December 1913 by Otto C. Duffner. [Note: Early collectors often referred to small sylvatic rodents as “Mus” and reference to the “civet cat” in southern Arizona likely refers to the ring-tailed cat (Bassariscus astutus, Lichtenstein) and not to skunks of the family Mephidae.]
Frons broadly rounded, without frontal tubercle. Inter-antennal suture (falx) well developed in both male and female. Antennal groove shallow, opened posteriorly. Antenna asymmetrical, extending onto prosternosome in male, female antenna shorter. Margin of pedicel with short setae, none extending much beyond base of clavus. Occipital area with three oblique rows of setae. Pre-antennal area (anterior to eye) with two rows of setae. Head lacking setae below or posterior to eye. Eye elliptical and pigmented; central unpigmented sinus present. Eye contiguous with two overlapping, darkly pigmented spines; lateral anterior spine broader and shorter than longer narrow mesal spine. Maxilla very elongated, extending half the length of forecoxa. Labial palpus long, extended to or beyond apex of trochanter. Pronotum with complete row of long setae anterior to 14–18 broad, bluntly pointed ctenidial spines. Mesonotal collar with several pseudosetae per side. Pleural arch well developed [an unusual characteristic for a true nest flea,
Phalacropsylla allos Wagner, 1936: 657.
Phalacropsylla monticola Augustson, 1941a: 144–145, 1941b: 156.
Phalacropsylls
allos
Ewing & Fox, 1943: 85; Jellison & Good, 1942: 124, 161;
Phalacropsylla monticola Hubbard, 1943: 6.
Phalacropsylla allos Stanford, 1944: 176; Costa Lima & Hathaway, 1946: 184.
Phalacropsylla monticola Costa Lima & Hathaway, 1946: 184; Hubbard, 1947: 339.
Phalacropsylla
allos
Hubbard, 1947: 340–341; Holland, 1949: 9; Tipton, 1950: 65; Williams & Hoff, 1951: 313;
Phalacropsylla
monticola
Phalacropsylla
allos
Stark, 1958: 82; Wiseman, 1955: 25; Smit & Wright, 1965: 10; Beck, 1966: 77; Hopkins & Rothschild, 1966: 301; Senger, 1966: 106; Allred, 1968: 77; Douglas, 1969: 493; Stark & Kinney, 1969: 290–293; Tipton & Saunders, 1971: 18; Weindner, 1972: 75;
Phalocropsylla allos males lack a well-defined sinus in the apico-ventral margin of the basimere above acetabulum (Fig.
2 Phalacropsylla allos male basimere and telomere. Arrows define ventral margin of basimere without sinus 3 Phalacropsylla nivalis male basimere, telomere, distal arm of S-IX, and aedeagus. White arrows define margin of sinus in ventral margin of basimere. AA = angular apex of basimere; HL = hyaline lobe of distal arm of S-IX 4 Phalacropsylla oregonensis, male holotype basimere, telomere, and distal arm of S-IX. Arrow indicates small sinus in ventral margin of basimere 5 Phalacropsylla paradisea, male basimere, telomere, and distal arm of S-IX. Arrows define margin of deep sinus on ventral margin of basimere. Scale = 0.2 mm
USA: Arizona, San Francisco Mts., 18 X 1989, G.E. Haas, 4♂, 4♀ (
Phalacropsylla allos is the most widely spread species of Phalacropsylla, occurring in southern British Columbia, Arizona, central to northern California, Colorado, Idaho, Montana, Nevada, New Mexico, Utah, and Wyoming (Fig.
MAMMALIA | |||||||
---|---|---|---|---|---|---|---|
ORDER | FAMILY | SPECIES | Phalacropsylla | ||||
allos | morlani | nivalis | oregonensis | paradisea | |||
Carnivora | Procyonidae | Bassariscus astutus* | †X* | ||||
Lagomorpha | Ochotonidae | Ochotona princeps | † | ||||
Rodentia | Cricetidae | Neotoma albigula | X | ||||
Neotoma cinerea | X | ||||||
Neotoma lepida | X | ||||||
Neotoma mexicana | †X | X | X | ||||
Neotoma stephensi | X | ||||||
Onychomys leucogaster | X | ||||||
Peromyscus boylii | † | ||||||
Peromyscus crinitus | † | ||||||
Peromyscus difficilis | † | ||||||
Peromyscus leucopus | † | ||||||
Peromyscus maniculatus | †X | X | |||||
Peromyscus melanotis | X | ||||||
Peromyscus pectoralis | X | ||||||
Peromyscus truei | † | X | |||||
Reithrodontomys megalotis | † | ||||||
Heteromyidae | Dipodomys merriami | X | |||||
Sciuridae | Tamiasciurus hudsonicus | X |
Phalacropsylla
morlani
Eads & Campos, 1982: 241–243; Lewis & Lewis, 1985: 149; Adams & Lewis, 1995: 68;
The apico-ventral margin of the basimere is entire, without a sinus, a feature shared only by P. allos and P. oregonensis (Figs
New Mexico: Santa Fe [Santa Fe County, elev. 3048 m], Ochotona princeps (Richardson), 10 X 1958 [10 XI 1958 was recorded by
The description of P. morlani was based on one male from Santa Fe County, although
Phalacropsylla
nivalis
Barrera & Traub, 1967: 35–45; Barrera, 1968: 70, 77; Lewis, 1974: 153;
Males of P. nivalis are separable from other species of Phalacropsylla except P. paradisea by the lack of a sinus in the apico-ventral margin of the basimere above the acetabulum (Figs
Mexico, State of Mexico, [Mirador del Poeta, N slope Mt.] Popocatépetl, 300 m SW Tlamacas, [~19.02°N, 98.38°W] 3900 m, s/Neotoma [Neotoma mexicana torquata], 19 IX 1963, A. Barrera, holotype ♂, allotype ♀ (
Known only from type material from Popocatépetl mountain, Mexico. Specimens were taken from two different hosts: Neotoma and Peromyscus. Phalacropsylla nivalis is the most extreme southern species of the genus, occurring many hundreds of kilometers from its closest allied species, P. paradisea.
Phalacropsylla
paradisea
Allred, 1968: 71 (specimen in
Phalacropsylla
oregonensis
Lewis & Maser, 1978: 147–150; Lewis & Lewis, 1985: 149;
Males differ from P. paradisea and P. nivalis by the absence of a sinus on the apico-ventral margin of the basimere. A small sinus is indicated, but its depth is much less than its width (Fig.
USA: Idaho, Bonneville County, NRTC, Idaho Falls, P. maniculatus, 21 X 1966, [D.E. Beck], coll. code: 36HF, 1♂ (
Phalacropsylla
paradisea
Rothschild, 1915: 39; Ewing & Fox, 1943: 85; Costa Lima and Hathaway, 1946: 184; Hubbard, 1947: 339–340;
Phalacropsylla
hamata
Tipton & Mendez, 1968: 184–187; Lewis, 1974: 153; Eads & Maupin, 1982: 96–99; Adams & Lewis, 1995: 68; Ponce-Ulloa & Llorente-Bousquets, 1996: 558;
Males of P. paradisea and P. nivalis each possess a deep sinus on the ventral margin of the basimere (at least as deep as wide) that separates both from other species of Phalacropsylla. Further separated from P. nivalis by the presence of long modified spiniform setae on DA9 which are absent in P. nivalis (Figs
Mexico: Nuevo León, Cerro Potosí, 3050 m, rodent nest, 20 IV 1964, V.J. Tipton et al., P. hamata holotype ♂ (
Tipton and Mendez (1968) described P. hamata from one male from Cerro Potosí, Nuevo León, Mexico.
During studies on plague in the Western United States by the U.S. Army in the mid-1970s, the junior author (MWH) identified two specimens (previously unreported) of P. paradisea that were collected on N. albigula (one specimen among 37 hosts examined) and Peromyscus boylii (Baird) (one from 10 hosts examined) from Fort Huachuca, Cochise County, Arizona. Although the whereabouts of these two specimens are unknown, they are documented in unpublished reports of the U.S. Army Environmental Hygiene Agency-Regional Division West, Aurora, Colorado.
In the latter years of his life, Dr. Glenn Haas concentrated his studies on the fleas in nests of small mammals, primarily the nests of Neotoma and arboreal Tamiasciurus. He placed the nests in breathable paper grocery bags, maintained humidity with moist paper towels, and meticulously hand-picked the emerging adult fleas over a period of weeks and months. Thus many of his mounted specimens were teneral and often not yet expanded from their recent pupal state. These “rearing” studies document the importance of species of Neotoma, particularly N. albigula, as the primary hosts of P. paradisea.
The key to females of Phalacropsylla by
1 | Ventral margin of basimere without a well-defined sinus | 2 |
– | Ventral margin of basimere with a well-defined sinus dorsal to the acetabulum. Sinus distinctly as deep as wide and rounded at base of sinus (P. oregonensis has only small sinus that is angular at base, not rounded) | 4 |
2 | Apical ventral margin of distal arm of S-IX with three long bent spiniform setae | oregonensis |
– | Apex of distal arm of S-IX without long setae | 3 |
3 | Apex of distal arm of S-IX broadening, wider than proximal area. Anterior margin of distal arm with hyaline lobe. Crochet acutely pointed | allos |
– | Distal arm wider at base than apex (gradual tapering towards apex). Without hyaline lobe on anterior margin of distal arm of S-IX. Crochet blunt at apex | morlani |
4 | Apex of basimere rounded. Apical ventral margin of distal arm of S-IX with two to four long, curved spiniform setae | paradisea |
– | Apex of basimere angular. Distal arm of S-IX without modified curved setae | nivalis |
To the curators who loaned the specimens and type material studied herein: John E. Rawlins, Carnegie Museum of Natural History, Pittsburgh, PA; Nancy Adams (deceased), David G. Furth, and Floyd Shockley, National Museum of Natural History, Smithsonian Institution, Washington, D.C; Juan J. Morrone, Museo de Zoología, Facultad de Ciencias, UNAM, Mexico, D.F. Appreciation is expressed to Jesús A. Fernández for hand carrying material to and from the USA and special thanks to Jarom Randall, Geospatial Analysis Data and Information Specialist, Harold B. Lee Library, Brigham Young University, Provo, Utah for preparation of the distribution map. We are grateful to Terry D. Galloway, University of Manitoba, Winnipeg, Canada and Ralph P. Eckerlin, Northern Virginia Community College, Annandale, Virginia for their valuable reviews and suggestions during the editorial process. To CONACyT (grant 200243) for supporting the senior author’s doctoral studies and Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica (PAPIIT-UNAM) IN205408 and IN214012, the Museo de Zoología, and to Michael F. Whiting and Shawn Clark, Monte L. Bean Life Science Museum, Brigham Young University, for provision of working spaces, equipment, supplies, and general support required for this work.