Studies in aquatic insects. XI : Seven new species of the genus Ochrotrichia (Ochrotrichia) from south America (Trichoptera: Hydroptilidae)

8 Pages·1992·3 MB·

by  J Bueno-Soria

PROC. ENTOMOL. SOC. WASH.
94(4), 1992, pp. 439-446
STUDIES IN AQUATIC INSECTS, XI: SEVEN NEW SPECIES OF THE
GENUS OCHROTRICHIA (OCHROTRICHIA) FROM
SOUTH AMERICA (TRICHOPTERA; HYDROPTILIDAE)
Joaquin Bueno-Soria and Silvia Santiago-Fragoso
Institute de Biologia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-
153, Mexico 04510, D. F. Mexico.
Abstract.—Sewen new species in the genus Ochrotrichia {Ochrotrichia) from South Amer-
ica are described and the malegenitalia figured. The species here described are Ochrotrichia
raposa (Colombia, Ecuador); O. puyana (Ecuador); O. ecuatoriana (Ecuador, Colombia);
O. oblongata (Trinidad); O. unica (Colombia); O. yanayacuana (Ecuador); and O. concha
(Brasil), the southernmost record for the subgenus Ochrotrichia in South America.
Key Words: New species, Ochrotrichia {Ochrotrichia), Trichoptera, Hydroptilidae, South
America
In 1979, Marshall established the tribe ia seemed to occur only in the northern and
Ochrotrichiini in the subfamily Hydroptili- western margins of South America, in
nae for the genera Ochrotrichia including its marked contrast to that of Metrichia. The
two subgenera (the nominate and Metrich- latter has been recorded only as far north
ia) and Rhyacopsyche. All members of the as Texas and Arizona in the United States,
New
tribe are limited to the World, al- but as far south as central Chile (Flint 1 983).
though other tribes in the subfamily are It is found throughout the Antilles as well,
found in all other regions ofthe world. Den- and appears to be especially diverse in the
ning and Blickle in their revision 1972) state Andean Mountains.
(
that the genus, from which they exclude Me- However, recent collections made in
trichia, is "exclusively North American in South America and placed in the National
distribution, occurring from a few localities Museum of Natural History, Smithsonian
in Canada to southern Mexico." In the same Institution (USNM) show that the subgenus
year Flint independently recorded twenty Ochrotrichia is actually more widely dis-
species from Mexico to Panama, and in 1981 tributed and diverse in South America than
recorded two species from northern Vene- believed. The species described herein ex-
zuela, the first records from South America. tend the known distribution in northern
The recent report of Ochrotrichia (O.) te- South America east to Trinidad and fill in
nanga Mosely from northern Peru was the gaps in Colombia and Ecuador. The most
first indication ofthe subgenus from the west unexpected record is from the central Am-
coast of South America (Flint and Reyes azon near Manaus, Brazil. In spite of these
1991). Other reports (Botosancanu 1979, new records, the accumulation ofspecimens
1990, Flint 1968) list the genus from the ofsubgenus Ochrotrichia from South Amer-
Greater and Lesser Antillean islands. Thus ica is very slow although many collections
the distribution ofthe subgenus Ochrotrich- have been made there in recent years.
440 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Ochrotrichia (O.) raposa. ofthe inferior appendages and the tenth ter-
New Species gum. However, it is easily distinguished
Figs. 1-3 from all its congeners by the single, elongate
mesal lobe of the tenth tergum which has
On the basis of the shape of the tenth
two short curved spines, dorsolaterally.
tergum and inferiorappendages, this species Adult.—Length offorewing 2.5 mm. Col-
appears to be similar to Ochrotrichia (O.)
or in alcohol dark brown. Male genitalia:
pacifica Flint. The new species is distin-
Ninth segment deeply depressed and pro-
guished by the presence ofa short, slender,
duced anteriad. Tenth tergum divided at
basodorsal process and a long process with
apex with two short stout spines on the left
the apex twisted on the left side on the tenth
side apically; in lateral view on the dorsal
tergum.
Adult.—Length offorewing 2 mm. Color margin with two stout spines. Inferior ap-
pendages in lateral view elongate and broad;
in alcohol dark brown. Male genitalia: Ninth
in dorsal view with an apical row of black
segment deeply depressed and produced an-
peglike setae and with a few black peglike
teriad. Tenth tergum with short, slender,
setae on the ventral margin. Phallus long
basal process on the right side; mesally with
and threadlike.
a stout process and a second stout process
Material.-Holotype, male: ECUADOR:
wslietnhdearpepxrocceusrsvewditthotthheealpeeftx; tawniosttheedronlotnhg,e SPpasatnagzlaerP&rovD.., RP.uyGoi,ve1n1s #M3a6y(U19S7N7M,)P.. J.
left side; in lateral view with short baso-
EXyv[\o\ogy.—puyana, Spanish, feminine
dorsal process and with three long curved
for inhabitant of Puyo.
processes. Inferior appendages in lateral
view long with the apex rounded; in dorsal
Ochrotrichia (O.) ecuatoriana.
and ventral views with a row of black peg-
New
Species
like setae around apex and on midbasal
Figs. 6-8
ridge. Phallus long and threadlike.
Material. —Holotype, male: COLOM- On the basis of the shape of the tenth
BIA: Dept. Valle del Cauca, Rio Raposo, tergum and inferior appendages in lateral
January 1965, V. H. Lee (USNM). Para- view, this species appears to be closely re-
types: ECUADOR: Esmeralda Prov., La lated to O. raposa. However, the lack ofthe
Union, 3 February 1979, Jos. J. Anderson, basodorsal spine on the tenth tergum makes
1 6 (USNM); Los Rios Prov., Quevedo (5 O. ecuatorianaeasily distinguished from that
&
kmS), 14 January 1978, P. J. Spangler J. species.
Anderson, 1 6 (USNM). Adult.—Length offorewing 2.5 mm. Col-
Etymology.—raposa, Spanish, feminine or in alcohol pale brown. Male genitalia:
name for the Raposo River. Ninth segment deeply depressed and slight-
ly produced anteriad; in lateral aspect with
Ochrotrichia (O.) puyana, rounded lobe produced posteriad. Tenth
New
Species
tergum in dorsal aspect with left lobe elon-
Figs. 4-5
gate, apically curving to the right, right lobe
This species fits best into the aldama wide at the base and narrowed at the slightly
group (Hint 1972) on the basis ofthe shape sinuous apex; in ventral view with a long
Figs. 1-5. Male genitalia o{ Ochrotrichia (O.). 1-3, raposa. 1, Left side. 2, Right side. 3, Ninth and tenth
terga and inferior appendages, dorsal view. 4, 5, puyana. 4, Left side. 5, Ninth and tenth terga and inferior
appendages, dorsal view. (9T = Ninth tergum. lOT = Tenth tergum. la = Inferior appendage.)
VOLUME NUMBER
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441
442 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
Figs. 6-8. Male genitalia ofOchrotrichia (O.) ecuatoriana. 6, Left side. 7, Ninth and tenth terga and inferior
appendages, dorsal view. 8, Ventral view.
spinelike lobe curved and directed posteriad tral margin with black peglike setae; close
and a short spinelike lobe whose apex is to the base a group of peglike setae on a
directed anteriad. Inferior appendages very small prominence. Phallus long and thread-
long and slender in lateral aspect, apex like,
— ECUADOR:
rounded; in ventral view the apex and ven- Material. Holotype, male:
1
VOLUME NUMBER 443
94, 4
Pastaza Prov., Puyo, 14 May 1977, P. J. shape ofthe apex ofthe inferior appendages
Spangler & D. R. Givens (USNM). Para- in lateral aspect and by the rather simple
type: COLOMBIA: Dept. Valle del Cauca, tenth tergum.
— mm.
Rio Raposo, January 1965, V. H. Lee, 6 Adult. Length of forewings 2.8
1
(USNM). Colorin alcohol dark brown. Male genitalia:
Eiymology.—ecuatoriana, Spanish for the Ninth tergum deeply depressed and slightly
women from Ecuador. produced anteriad; in lateral aspect almost
square. Tenth tergum a simple dorsal plate,
Ochrotrichia (O.) oblongata, almost straight in lateral view. Inferior ap-
New
Species pendages in lateral view with patch ofsetae
Figs. 9-1 dorsally on one, the apex circular, dark and
On the basis of the shape of the tenth with many peglike setae. Phallus long and
tergum and inferiorappendages, this species threadlike.
COLOM-
Material.- Holotype, male:
belongs to the fenanga group (Flint 1972).
However can be separated by possessing BIA: [Dept. Valle del Cauca], Rio Raposo,
it
two short spines on the left side and by the January 1965, V. H. Lee (USNM). Para-
placement oftwo long processes on the right types: Same data as the holotype, 2 6
(USNM).
side.
—
Adult.—Length offorewing 2 mm. Color Etymology. wn/ca, Spanish, for unique.
in alcohol dark brown. Male genitalia: Ninth
Ochrotrichia (O.) yanayacuana.
tergum deeply depressed and produced an-
New
Species
teriad. Tenth tergum with an elongate, dark-
Figs. 15-17
tipped, middorsal process giving rise to
two short, basolateral spines on the left side; Based on the overall appearance of the
right side with two long processes; in lateral genitalia, this species appears to be related
view with two long processes, one arising to Ochrotrichia (O.) moselyi Flint, O. (O.)
basally and extending ventrally and the oth- tagala Flint and O. (O.) pectinifera Flint;
er arising from an enlarged base at mid- however, it can be distinguished from those
length dorsally, ending in an apex curved species by the presence ofa large, upturned,
ventrad. Inferior appendages in lateral view black-tipped spine on the inner surface of
long, slender, apex rounded; in ventral view the right inferiorappendage and by the pres-
the apex and midbasal ridge with a band of ence oftwo large spines on the tenth tergum.
black, peglike setae. Phallus long and Adult.—Length offorewings 2 mm. Color
threadlike. in alcohol dark brown. Male genitalia: Ninth
Material.-Holotype, male: TRINIDAD: tergum deeply depressed and slightly pro-
Arima cascade, 17 April 1985, V. Jones duced anteriad. Tenth tergum with two, long,
(USNM). narrow, processes, ventral one wider ante-
—
Etymology. oblongata, Latin, for the riorly, apex acute and directed ventrad; dor-
longer than broad shape of the inferior ap- sally with two black spines, basal-most larg-
pendages. er than the other; in lateral aspect with an
acute apex to the ventral lobe. Inferior ap-
Ochrotrichia (O.) unica,
pendages in lateral view with an elongate,
New
Species
fingcrlikc, dorsal lobe; midventrally with 5-
Figs. 12-14 6 heavily sclerotized spines: on the left ap-
On the basis of the tenth tergum and in- pendage with two spines on the middorsal
ferior appendages, this species fits in the margin and three on the posteroventral
xena group (Flint 1972). However, this spe- margin, on the right appendage with six
cies can be recognized by the almost circular spines in a row on the lateral margin; basal
PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
444
Figs. 9-14. Male genitalia ofOchrotrichia (O.). 9-11, oblongata. 9, Right side. 10, Left side. 11, Ninth and
tenth terga and inferior appendages, dorsal view. 12-14, unica. 12, Left side. 13, Right side. 14, Ninth and tenth
terga and inferior appendages, dorsal view.
Figs. 15-20. Malegenitalia ofOf/jromc/j/a(a). \5-11, yanayacuana. 15, Right side. 16, Left side. 17, Ninth
and tenth terga and inferior appendages, dorsal view. 18, 19, concha. 18, Right side. 19, Left side. 20, Ninth
and tenth terga and inferior appendages, dorsal view.
VOLUME NUMBER
94, 4 445
446 PROCEEDINGS OF THE ENTOMOLOGICAL SOCIETY OF WASHINGTON
portion widened. Phallus long and thread- S. Flint, Jr., Curator ofNeuropteroids ofthe
like. Department of Entomology, for his sugges-
Material.-Holotype, male: ECUADOR: tions and organization of the manuscript
Tungurahua Prov., Yanayacu, 300 m, 29- and for the use of the collection; to Miss
30 August 1977, L. E. Peiia G. (USNM). Nancy Adams, Neuropteroids technician,
Etymology, —yanayacuana, Spanish, for her assistance during our stay at the Mu-
feminine, for inhabitant of that region. seum; to our technician, Biol. Rafael Bar-
ba, for his contribution with the drawings;
Ochrotrichia (O.) concha,
and to Mrs. Phyllis Spangler for her help
New
Species
with the initial word processing. Finally to
Figs. 18-20 the anonymous reviewer for his valuable
This species is another member of the suggestions improving the manuscript.
xena group, with a simple tenth tergum and
Literature Cited
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—
Material. Holotype, male: BRASIL: 1983. Studies of Neotropical caddisflies,
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Peru. Proceeding of The Biological Society of
Acknowledgments Washington 104: 474-492.
A
We Marshall, J. E. 1979. review of the genera of the
are indebted to Dr. Paul J. Spangler Hydroptilidae (Trichoptera). Bulletin ofthe Brit-
forhis invitation to work undera grant from ish Museum (Natural History), EntomologySeries
the Smithsonian Institution; to Dr. Oliver 39: 135-239.