New combinations, status, and species of Neotropical Ambrysini (Heteroptera: Naucoridae: Cryphocricinae)
Author
Reynoso-Velasco, Daniel
text
Zootaxa
2017
2017-09-25
4323
4
503
518
journal article
32005
10.11646/zootaxa.4323.4.4
cafdc21f-367c-4abc-b93c-bf4338483003
1175-5326
995854
5641Cb17-Fb71-4Ebc-B178-0891C31B6Abb
Carvalhoiella maldonadus
(La Rivers)
NEW COMBINATION
Figs. 1–7
Ambrysus maldonadus
La Rivers 1954
: Entomol. News 45: 197–201 (original description).
Ambrysus
(
Syncollus
)
maldonadus
:
La Rivers 1965
. Biol. Soc.
Nevada
Occas. Pap., 4: 5 (subgenus designation).
Diagnosis.
Body length
10.24–11.20 mm
. The dorsum is shiny. A series of pits lines the anterior margin of the posterior transverse band on the pronotum (
Fig. 1
). Tergum VI of the male lacks an accessory genitalic process (
Fig. 2
). The mesal margins of the laterosternites (evident on segments III–VI of both sexes) are slightly offset from one another and the abdominal venter is brown with a wide, glabrous, yellow marginal band. The midline of sterna V–VIII (males) and V–VII (females) are mostly glabrous and impubis. The pseudoparameres (medial lobes of tergum VIII) are large, broad, posterolaterally directed, with apices broadly rounded and overlapping the lateral lobes (
Fig. 3
). The proctiger is setose in the middle third and nearly devoid of setae in the lateral thirds (
Fig. 5
), and the parameres have an apical tuft of elongate setae (
Fig. 6
). The ventral margins of the phallosoma are mostly unmodified, although sclerotized lobes overlap near the base of the endosoma (
Fig. 7
). The distal margin of the female subgenital plate is broadly convex medially with roundedly-produced posterolateral corners (
Fig. 4
).
TABLE 1.
Comparison of character states among genera of
Ambrysini
.
Character |
Ambrysus
|
Cataractocoris
|
Carvalhoiella
|
Hygropetrocoris
|
Picrops
|
head lobed posteriorly |
strong |
strong |
slight |
slight |
strong |
vestiture on ventral midline |
hair pile |
partially bare |
partially bare |
♂ partially bare |
band of hairs |
head produced anteriorly |
no |
yes |
no |
yes |
no |
laterosternite mesal margins |
continuous |
offset |
offset |
absent |
continuous |
accessory genitalic process on tergum 6 |
yes |
no |
no |
no |
no |
accessory genitalic process on tergum 7 |
no |
no |
no |
no |
yes |
pseudoparameres on tergum 8 |
moderate |
moderate |
large |
large |
absent |
parameres |
symmetrical |
symmetrical |
symmetrical |
symmetrical |
asymmetrical |
ventral abdominal marginal band |
narrow |
wide |
wide |
wide |
narrow |
dorsum flat |
yes |
yes |
yes |
no |
yes |
bulbous eyes |
no |
no |
no |
yes |
no |
head oriented vertically |
no |
no |
no |
yes |
no |
hair lines & patches on forewing |
no |
no |
no |
yes |
no |
forefemur excavate distally |
no |
no |
no |
yes |
no |
foretibia with prominent tooth |
no |
no |
no |
yes |
no |
stout marginal tufts of setae |
no |
no |
no |
yes |
no |
Discussion.
In the original description,
La Rivers (1954)
recognized the distinction of
A. maldonadus
from other species of
Ambrysus
because of the "conspicuous black procts" (=pseudoparameres or medial lobes of tergum VIII) and the outline of the subgenital plate. Later,
La Rivers (1963
,
1965
) further recognized the degree to which this species was atypical by suggesting that it might merit its own subgenus. In the original description of
Ambrysus montandoni
,
La Rivers (1963)
made extensive comparisons with
A. maldonadus
, which he considered to be closely related.
This species is known only from
Venezuela
and bears superficial resemblance to
Carvalhoiella nitida
in that their size, shape, and glossy appearances are similar; however,
Ambrysus maldonadus
exhibits other diagnostic attributes consistent with
Carvalhoiella
, including the loss of setae on the abdominal mediosternites, the head is not produced anteriorly, the anterior margin of the pronotum is only slightly concave to receive the head, the mesal margins of the laterosternites are diagonally offset from one another, the ventral abdominal lateral band is wide, and the pseudoparameres are large and posterolaterally directed (
Table 1
). It lacks many of the distinguishing features of the genus
Ambrysus
, including deep invagination of the head into the pronotum, continuous ventral abdominal hair pile, continuous mesal margins of the laterosternites, narrow ventral abdominal lateral band, small male pseudoparameres, and the male accessory genitalic process of tergum VI (
Table 1
). Thus,
Ambrysus maldonadus
is transferred to the genus
Carvalhoiella
.
Type
locality
:
Venezuela
, Territorio
Amazonas
,
Mount Marahuaca
,
Upper Cunucunuma River.
Type
repository
:
California
Academy of Sciences (
holotype
♂
by original designation).
Material examined. VENEZUELA
: Venezuela Exp., Territ. Amazonas, Upper Cunucunuma, Julian,
May 27, 1950
/ J. Maldonado Capriles Coll. /
Ambrysus maldonadus
La Rivers 1954
, HOLOTYPE ♂ /
Ambrysus maldonadus
La Rivers 1954
, determined by Ira La Rivers '54 / Ira La Rivers Collection, Bequeathed to the California Academy of Sciences—1978 / California Academy of Sciences Type No. 13409 (Holotype ♂ CAS); same data,
Ambrysus maldonadus
La Rivers 1954
, Paratype / J.T. Polhemus Collection 2014, C.J. Drake Accession (1♂, 1♀ USNM); Amazonas State, S Puerto Ayachucho, El Tobogan de la Selva,
14 January 2009
/ 5°23.207'N, 67°36.922'W,
125 m
, VZ-20090114-01, coll: J. Camacho (1♂, 1♀ UMC); Amazonas,
42 km
S of Puerto Ayacucho Tobogan,
19 January 1989
, J.T. Polhemus, CL2371, (2♂, 2♀ UMC).