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