Tricorythodes sordidus
Tricorythodes
Tricorythodes
Tricorythodes caenosus
Tricorythodes casnosus
T. sordidus
T. sordidus
T. sordidus
Cabecar serratus, a new genus and species of leptohyphid mayfly from Central America, and description of the imaginal stages of Tricorythodes sordidus Allen (Ephemeroptera: Leptohyphidae)
Baumgardner, David E.
Ávila, Socorro
Zootaxa
2006
2006-04-28
1187
1
47
59
58N5K
Allen
Allen
1967
[264,615,1364,1390]
Insecta
Leptohyphidae
Tricorythodes
Animalia
Ephemeroptera
7
54
Arthropoda
species
sordidus
Tricorythodes sordiduswas described by Allen (1967)based upon larvae collected from San Jose Provincein Costa Rica. The species has also recently been documented from Guatemala( McCafferty et al. 2004). Records given below further document the species, for the first time, from Méxicoand Nicaragua. Although Allen (1967)did not discuss in detail how this species differed from other species of Tricorythodes, the long setae on the head and thorax, and its general body coloration distinguish it from other Tricorythodeslarvae. The holotypeis presently deposited at Florida A&M University (Tallahassee), and is in good condition. The holotypelabel bears the name “ Tricorythodes caenosus”, as do four paratypesdeposited at the California Academy of Sciences and eight paratypesdeposited at Purdue University (Luke Jacobus, personal communication). An additional paratype, also deposited at Florida A&M University, bears a label with the name “ Tricorythodes casnosus”. Evidently, both of these names are manuscript names used at some point by Allen. The locality labels in the vials correspond exactly with the locations given for T. sordidusin the original description. In addition, the specimens agree well with the original description, and all are considered here to belong to the original type series of T. sordidus. All of these specimens and specimen vials have been relabeled to indicate that they all belong to the types series of T. sordidus, and have been returned to their respective institutions. The following imago description is based upon 3 reared males and 7 reared females from Domitalia Field Station in Nicaragua, and Las Cruces Biological Station in Costa Rica.
Male imago.Body length: 3.0–3.5 mm. Forewing length 2.5–3.0 mm. Hindwing absent. Cercus and median caudal filament length 8.0–9.0 mm. Head:pale to pale reddish brown with diffuse overshadings of black dorsally; compound eyes small, widely separated; diameter of one eye less than distance between eyes; lateral ocelli black at base, clear in distal onethird; median ocellus mostly clear; antenna white with black stippling. Thorax:prothorax pale with extensive overshadings of black dorsally; meso and metanota pale brown to reddish brown with diffuse overshadings of black stippling; lateral margins pale with black stippling; membranous filaments on mesoscutellum (plumidium) absent. Femur: pale to pale reddish brown with very limited black overshading; foretibia white to pale gray with black over shading; foretarsus pale, threefourths length of foretibia; meso and metatibia pale reddish brown with black stippling and median pale area; claws similar and blunt; hindfemur less than threefourths length of hindtibia and handtarsus combined. Forewings: translucent, margin opaque; costa, subcosta, and R1 purplish brown for onehalf to threequarters their length; subcosta heavily pigmented purplishbrown beyond margin of vein; vein ICu1 joined basally with vein A, forming a triad where veins CuP and ICu2 are included; vein CuP present, not converging with vein A; vein ICu2 present, detached from ICu1. Abdomen:pale yellow with moderate to extensive black overshading; terga IIVI with pale median line; sternites pale with black stippling limited to margins; cerci pale gray, bases with black stippling. Genitalia (Fig. 16): penes broad, fused for most of their distance, with shallow distomedial emargination; subgenital plate with moderately deep emargination; forceps three segmented, second segment with a basal swelling; segment one of forceps about as long as segments two and three combined. Female imago.Body length: 3.0–3.5 mm. Forewing length 2.5–3.0 mm. Hind wing absent. Cercus length 1.0–1.5 mm. Median caudal filament 2.0–2.5 mm. Head:pale yellow with diffuse overshadings of black dorsally; shading most intense at base of ocelli and between compound eyes; compound eyes small, widely separated; diameter of one eye less than distance between eyes; lateral and median ocelli black at base, clear in distal onethird; antenna white. Thorax:prothorax pale with extensive overshadings of black dorsally; meso and metanotam reddish brown with black stippling medially and laterally; sterna pale yellow to white, margins light brown. Femur: white, margins reddish brown with black stippling; tibia and tarsus pale reddish brown. Forewings as in male. Abdomen:tergites IVIII yellow, IX and X pale yellow to white; dorsally with extensive black stippling forming transverse black bands; sternites pale yellow; subgential plate triangular with posterior margin rounded; cercus and median caudal filament pale gray.
Discussion:Adults of Tricorythodes sordidusfit within the concepts of Tricorythodesgiven by both Molineri (2002)and Wiersema and McCafferty (2000), including characters of the male genitalia (number and relative length of forceps and shape of penes), absence of hindwings, and vein ICu 1joined basally with vein A forming a triad where veins CuP and ICu 2are included. Currently, there are only two species of Tricorythodesknown from Central America: T. sordidusand T. costaricanus(Ulmer). The holotypeof T. costaricanusis based on a female imago deposited in the Bavarian State Collection, Zoology, Munich, Germany(ErnstGerhard Burmeister, personal communication). Because of the extremely fragile nature of the dried and pinned holotype, it was not available to be mailed for detailed study. However, Dr. Burmeister did provide pictures of the holotypeand associated labels, which were sufficient for comparison with T. sordidus. The holotypeis in relatively good condition with all three body regions, wings, and at least some of the legs, present and intact. The type locality of T. costaricanus, written on a label associated with the holotype, is “ San José, Costa Rica”. No other specific information was given on the label. Although T. sordiduswas collected from the same province in Costa Ricaas the holotypeof T. costaricanus, it does not appear that T. sordidusis a synonym of T costaricanus.First, females of T. costaricanusare a little larger and described as possessing caudal filaments measuring about 3 mmin length, while females of T. sordidushave relatively short cerci (half to a little more than half length of caudal filament). Second, T. costaricanushas a body which is generally brown to dark brown in color. Tricorythodes sordidusadults are much paler, with a thorax which is more pale brown than T. costaricanus, and an abdomen which is generally pale yellow with moderate to extensive black shading. These characters should easily distinguish T. sordidusfrom T. costaricanusin the adult stage of both genders.
Distribution and Biology: Tricorythodes sordidusappears to be widely distributed and common in Latin America. It is known from northeastern Mexicosouth to Costa Rica. Larvae can be found in a wide variety of lotic habitats, from smaller creeks to large rivers, and are usually extensively covered with sediment.
Type Material Examined: HOLOTYPE: Tricorythodes sordidusAllen; COSTA RICA: San Jose Prov.: San Jose, 9viii62, G.G. Musser[ FSCA( FAMU)— E2003.1 T]. HOLOTYPE: Tricorythodes costaricanus(Ulmer); COSTA RICA: San Jose[Bavarian State Collection, Zoology, Munich, Germany] (electronic images of holotypeonly examined). Other Type Material Examined: PARATYPES: 4 larvae, same data as holotype ( CAS), originally designated paratopotypes. COSTA RICA: stream 11 mi.SE San Isidro del General, 200 ft., 22vii1962, G.G. Musser, 1 larva, 4 associated slides [ FSCA( FAMU) E2003. T]. Material Examined Not Belonging to Type Series: Allspecimens deposited at TAMU unless otherwise indicated. COSTA RICA: Alajuela Prov.: NE of Bijagua, nr. Las Flores, Río Areuo( 10°21’06”N; 85°21’05”W), 07.vi.2000, 2L, WDS; 3 kmSE Rio Cuarto, Hwy.140, Río Hule( 10°20’N; 84°12’W), 15.i.2000, 1L, WDS. Guanacaste Prov.: 4.8 km N Canas, Hwy.142, Río Santa Rosa, 17.i.2000, 4L, WDS; Río Diriaat unnamed road, ca. 1 Km. Eof intersection with Hwy21, ( 10°20’05”N; 85°34’04”W), 15.vi.2001, 3L, DEB; 6 kmS San Miguel, Hwy1, Quebrada Culvert( 10°19’N; 85°03’W), 23.i.2000, 3L, WDS; unnamed creek at Hwy.18, ca. 8 Km NW Nicoya( 10°10’00”N; 85°26’08”W), 16.vi.2001, 2L, DEB. Heredia Prov: unnamed creek at Hwy4, ca. 3 Kmfrom jct. with Hwy32 ( 10°15’10”N; 83°55’11”W), 10.vi.2001, 2L, DEB. Limón Prov.: Río Catarataat Hwy36, 4 Km East of Bribri( 09°37’50”N; 82°49’06”W), 11.vi.2001, 1L, DEB; unnamed creek at Hwy32, ca. 3 Km W of Pocora( 10°10’38”N; 83°37’03”W), 10.vi.2001, 2L, DEB; unnamed stream at road, ca. 2 KmNW Puerto Viejo( 09°38’43”N; 82°47’12”W), 11.vi.2001, 1L, DEB. Puntarenas Prov.: 1 Km S Coloradito, Río Coloraditoat Hwy.2 ( 08°36’10”N; 82°54’07”W), 17.vi.2000, 3L, WDS; 4.1 KmN Dominical on Hwy.243, unnamed river ( 09°16’51”N; 83°50’55”W), 14.vi.2000, 2L, WDS; Río Jabaat Las Cruces Biological Station, ca. 14 Km.S SanVito, 23, 24.vi.2001, 1L, 1♂(reared), DEB; Estacion Biologica Monteverde, Quebrada Moquina( 10°19’N; 84°48’W), 24.i.2000, 2L, WDS; Río Baruat Baru, ca. 5 Km NE Dominical, 22.vi.2001, 1L, DEB; 1 Km S Coloradito, Río Coloraditoat Hwy2 ( 08°36’10”N; 82°54’07”W), 17.vi.2000, 6L, WDS; Quebrada Culebraat Las Cruses Biological Station, ca. 14 KmS. SanVito, 24.vi.2001, 2L, DEB; NE Dominical, unnamed stream ( 09°16’48”N; 83°49’22”W), 19.vi.2000, 1L, WDS; unnamed creek at Hwy.34, ca 37.5 Km SE Dominical( 09°03’04”N; 83°37’00”W), 22.vi.2001, 5L, DEB; Río Caracolat CA Hwy.2, ca. 7.3 KmE. Río Claro( 08°39’47”N; 83°00’41”W), 23.vi.2001, 3L, DEB; 5 KmSE Coloradito, unnamed river ( 08°34’41”N; 82°52’28”W), 17.vi.2000, 1L, WDS. San Jose Prov.: Río Pedregosoat Hwy.243, ca. 4 KmS. San Isidro de El General( 09°21’15”N; 83°43’35”W), 22.vi.2001, 1L, DEB. GUATEMALA: Chiquimula Dept.: Río Anguiatu, Fronteraa Anquiata, 13.vii.1995, 1L, Bryan Yates; El Progreso Dept.: Río Hatoat CA Hwy.9, ca. 5.9 Km E.from jct. with Hwy.17, Magdalena( 14°55’11”N; 89°57’56’W), 14.vii.2001, 3L, DEB; Quebrada Las Pericasat Hwy.17, 11.1 Km W.from jct. with Hwy. CA( 09°14’54”N; 90°05’52”W), 12.vii.2001, 4L, DEB; Izabel Dept.: Río Cienegaat CA Hwy.13, ca. 4 Km. S. Shaila( 15°43’53”N; 89°84’44”W), 16.vii.2001, 1L, DEB; Zacapa Dept.: Río Cayoat CA Hwy.9, 2.3 Km E. Santa Cruz( 15°00’54”N; 89°39’09’W), 14.vii.2001, 1L, DEB; Río Cayoat CA Hwy.9, 2.3 Km E. Santa Cruz(15°00’54’N; 89°39’09’W), 14.vii.2001, 3L, DEB. MEXICO: Nuevo Leon: Río Cabazonesat Hwy. 85, 15 mi. N. Linares., 5L, 16.v.1995; unnamed creek at road leading to Brownsville, nr. town of Galenanaoff Hwy.60, 9L, 19.v.1995; Queretaro: Puerta de Alegriax, Arroyo Los Zunigas( 20°20’28”N; 100°07’10”W), 1L, 08vii2000, WDS; 1 Km.S. Huasquilico, Arroyo Jalpan( 21°09’04”N; 99°34’42”W), 7L, 11.vii.2000, WDS; 1 kmSSE San Pedro, Arroyo Real( 21°07’07”N; 99°32’05”W), 12L, 11.vii.2000, WDS; Chuveje, Río Chuveje( 21°10’13”N; 99°33’18”W), 12.vii.2000, 1L, WDS; Pínal de Amoles, Agua Fria( UTM 2338413), 1L, 28.viii.1997, R. Jones; San Luís Potosi: Río Moctezumaat Tamazunchale on Hwy.85, 2L, 18.viii.1977, R. K. Allen( CAS); Tamaulipas: Río San Marcosnr. Ciudad Victoria, 14L, 24/ 25.x.1968, R. K. Allen( CAS); Branch of Río Chihueat Hwy.101, ca. 12 mi.S Juamave, nr. kilo. marker #91, 10L, 17.v.1995, DEB. NICARAGUA: Granada: Unnamed riverat Domitila Field Station, ca. 30 kmS Granada(N11º42'09"; W85º57'06”), 1318.vi.2004, 68L, 2♂(reared, 1 slide, #DB05012901 – genitalia drawn from this slide), 7♀(reared), DEB.
FSCA, FAMU, T
G. G. Musser
Costa Rica
San Jose Prov.
9
56
E2003.1
1
San Jose
holotype
Costa Rica
San Jose
9
56
2
San Jose
holotype
1962-07-22
CAS
G. G. Musser
Costa Rica
61
San Isidro del General
10
57
4
4
San Jose
paratype
FSCA, FAMU, T
Costa Rica
10
57
E2003
1
1
San Jose
paratype
2000-06-07
WDS
Series & All & Las Flores
Costa Rica
10.351667
Rio Areuo
21
-85.35139
10
57
1
Alajuela
holotype
2000-01-15
WDS
Costa Rica
10.333333
Rio Hule
1298
-84.2
Hwy.
10
57
1
Alajuela
holotype
2000-01-17
WDS
N Canas & Hwy.
Costa Rica
Rio Santa Rosa
10
57
1
Guanacaste
holotype
2001-06-15
DEB
Km. E & Hwy
Costa Rica
10.334722
Rio Diria
21
-85.56778
10
57
1
Guanacaste
holotype
2000-01-23
WDS
Quebrada Culvert
Costa Rica
10.316667
Hwy
1298
-85.05
10
57
1
Guanacaste
holotype
2001-06-16
DEB
Hwy. & Km NW Nicoya
Costa Rica
10.166667
21
-85.435555
10
57
1
Guanacaste
holotype
2001-06-10
DEB
Prov & Hwy & Km
Costa Rica
10.252778
Heredia
21
-83.919716
10
57
1
Heredia
holotype
2001-06-11
DEB
Hwy
Costa Rica
9.630556
Km East of Bribri
21
-82.81833
Rio Catarata
10
57
1
Limon
holotype
2001-06-10
DEB
Hwy & Km
Costa Rica
10.177222
W of Pocora
21
-83.6175
10
57
1
Limon
holotype
2001-06-11
DEB
Km & Puerto Viejo
Costa Rica
9.645278
21
-82.78667
10
57
1
Limon
holotype
2000-06-17
WDS
Km S Coloradito & Hwy.
Costa Rica
8.602778
Rio Coloradito
21
-82.90195
10
57
1
Puntarenas
holotype
2000-06-14
WDS
Km
Costa Rica
9.280833
Dominical on Hwy.
21
-83.84861
10
57
1
Puntarenas
holotype
2001-06-24
DEB
Costa Rica
Rio Jaba
Km.
Las Cruces Biological Station
10
57
1
1
Puntarenas
holotype
2000-01-24
WDS
Estacion Biologica Monteverde & Quebrada Moquina
Costa Rica
10.316667
1298
-84.8
10
57
1
Puntarenas
holotype
2001-06-22
DEB
Baru & Km NE Dominical
Costa Rica
Rio Baru
10
57
1
Puntarenas
holotype
2000-06-17
WDS
Km S Coloradito & Hwy
Costa Rica
8.602778
Rio Coloradito
21
-82.90195
10
57
1
Puntarenas
holotype
2001-06-24
DEB
Quebrada Culebra & Km
Costa Rica
San
Las Cruses Biological Station
10
57
1
Puntarenas
holotype
2000-06-19
WDS
Dominical
Costa Rica
9.28
21
-83.82278
10
57
1
Puntarenas
holotype
2001-06-22
DEB
Hwy. & Km SE Dominical
Costa Rica
9.051111
21
-83.61667
10
57
1
Puntarenas
holotype
[1003,1222,1364,1390]
CA
Costa Rica
Rio Caracol
10
57
1
Puntarenas
holotype
2001-06-23
DEB
Hwy. & Km
Costa Rica
8.663055
Rio Claro
21
-83.01139
10
57
1
Puntarenas
holotype
2000-06-17
WDS
Km & Coloradito
Costa Rica
8.578055
21
-82.87444
10
57
1
Puntarenas
holotype
2001-06-22
DEB
Hwy. & Km
Costa Rica
9.354167
San Isidro de El General
21
-83.72639
Rio Pedregoso
10
57
1
San Jose
holotype
1995-07-13
CA
Dept. & Frontera & Anquiata & Bryan Yates
Guatemala
Rio Hato
Rio Anguiatu
10
57
1
Chiquimula
holotype
2001-07-14
DEB
Hwy. & Km E. & Magdalena
Guatemala
14.919723
10
57
1
Chiquimula
holotype
CA
Quebrada Las Pericas & Hwy. & Km W.
Guatemala
9.248334
21
-90.09778
10
57
1
Chiquimula
holotype
[658,917,1684,1710]
2001-07-12
DEB
Guatemala
10
57
1
Chiquimula
holotype
[930,1323,1684,1710]
CA
Izabel Dept.
Guatemala
Rio Cienega
10
57
1
Chiquimula
holotype
[264,1221,1724,1750]
2001-07-16
DEB
Hwy. & Km. S. Shaila
Guatemala
15.731388
10
57
1
Chiquimula
holotype
CA
Dept.
Guatemala
Rio Cayo
10
57
1
Zacapa
holotype
2001-07-14
DEB
Hwy. & Km E. Santa Cruz
Guatemala
15.015
10
57
1
Zacapa
holotype
[549,752,1804,1830]
CA
Guatemala
Rio Cayo
10
57
1
Zacapa
holotype
2001-07-14
DEB
Hwy. & Km E. Santa Cruz
Guatemala
10
57
1
Zacapa
holotype
1995-05-16
2000-07-08
1995-05-16
WDS
Hwy. & N. Linares. & Brownsville & Galenana & Arroyo Los Zunigas
Mexico
11
58
20.341112
Puerta de Alegriax
21
-100.119446
Rio Cabazones
10
57
1
Nuevo Leon
holotype
2000-07-11
WDS
Km. & Huasquilico & Arroyo Jalpan
Mexico
21.151112
21
-99.57833
11
58
1
Nuevo Leon
holotype
2000-07-11
WDS
Mexico
21.11861
Arroyo Real
21
-99.53472
11
58
1
Nuevo Leon
holotype
2000-07-12
WDS
Chuveje
Mexico
21.170277
Rio Chuveje
21
-99.555
11
58
1
Nuevo Leon
holotype
1997-08-28
R
Agua Fria
Mexico
Pinal de Amoles
11
58
UTM 2338413
1
Nuevo Leon
holotype
1977-08-18
R
Jones
Mexico
Tamazunchale on Hwy.
Rio Moctezuma
11
58
1
San Luis Potosi
holotype
1968-10-25
CAS, R
K. Allen & Ciudad Victoria
Mexico
Rio San Marcos
11
58
1
Tamaulipas
holotype
1995-05-17
CAS, DEB
K. Allen & Hwy.
Mexico
Branch of Rio Chihue
11
58
1
Tamaulipas
holotype
2004-06-13
2004-06-18
2004-06-13
DEB
Nicaragua
Domitila Field Station
Unnamed river
11
58
9
7
2
Granada
holotype