Nov 25, 1976 - of greyish-white lines and brown streaks, the ovate aperture and the ... collector, Dr. G. F. Mees, who always makes special effort to collect land.
ZOOLOGISCHE MEDEDELINGEN U I T G E G E V E N D O O R
RIJKSMUSEUM
V A N NATUURLIJKE
H E T
HISTORIE
T E LEIDEN
( M I N I S T E R I E V A NC U L T U U R , R E C R E A T I E E N M A A T S C H A P P E L I J KW E R K )
Deel 50 no. 7
25 november 1976
NOTES O N BULIMULIDAE (GASTROPODA, EUTHYNEURA), 4 ) SOME BULIMULIDEA FROM FRENCH GUYANA AND SURINAM, WITH NOTES O N THEIR A N A T O M Y 1
by
A. S. H. B R E U R E D e p a r t m e n t o f Systematic
Zoology, With
9
c/o Rijksmuseum van Natuurlijke text-figures
Historie, Leiden
a n d one plate
During work for a generic revision of the family Bulimulidae some material from French Guyana and Surinam came to my hands. This material stems from the collections of the Muséum National d'Histoire Naturelle, Paris ( M N H N ) , the Rijksmuseum van Natuurlijke Historie, Leiden ( R M N H ) and the Zoölogisch Museum, Amsterdam ( Z M A ) . The specimens of the present study belong mainly to the genera Bulimulus Leach, 1814 and Drymaeus Albers, 1850 (among them the type material of Vernhout (1914)). The following abbreviations have been used: A G , albumen gland; E P , epiphallus; F L , flagellum; O V , ovotestis; P , penis; P R , prostate; S D , spermathecal duct; S P , spermatheca; V D , vas deferens. Recently
Altena
(1975)
i n c l u d i n g notes o n some
published
some
Bulimulidae.
data
on land
Restudying
Gastropoda
his m a t e r i a l
I
from
Surinam,
the
following
have
comments : (1)
Drymaeus
interruptofasciatus
(2) Drymaeus
papyraceus
(3) Drymaeus
succineus
Vernhout
=
M a w e sensu A l t e n a
Drymaeus
semimaculatus
= Drymaeus
w a s described b y P i l s b r y
altenai
Pilsbry.
sp. n.
(1901), not b y V e r n h o u t .
T h e m a t e r i a l u p o n w h i c h V e r n h o u t based his r e c o r d f o r S u r i n a m consists specimen, w h i c h does n o t f i t the redescription o f Drymaeus Parodiz
(1962).
[I call i n question whether
cineus as a member o f Stenostylus
(5) Simpulopsis
quadrifasciatus corrugata
the identification
Vernhout
G u p p y belongs
)
Notes
o n B u l i m u l i d a e , 3. —
by Parodiz of
suctaxon
(1975).
= Drymaeus
vernhouti
n o m . n.
to the B u l i m u l i n a e instead o f to the A m p h i -
buliminae (misspelled A m p h i b u l i m u l i d a e b y A l t e n a ) .
1
o f one
as g i v e n b y
is c o r r e c t ] . It seems better to delete this
f r o m the faunal list as g i v e n b y A l t e n a (4) Drymaeus
succineus
B a s t e r i a , 4 0 : 3-6 (1976).
108
ZOOLOGISCHE
MEDEDELINGEN
50 (1976)
Bulimulus eyriesii (Drouët, 1859) (fig. 1) Bulimulus
(Bulimulus)
eyriesii,
B r e u r e , 1974: 46, p l . 4 figs.
1-3. [Redescription,
refer-
ences].
T o ensure stability of nomenclature it is necessary to designate a lecto or neotype for this taxon, which could not be undertaken at the time of writing of the abovementioned revision. A search has been made for the original material of Drouët. A s he lived in Troyes and Dijon (Kuiper, 1969) a request was made to the local natural history museums for the whereabouts of his collection. It appeared that this collection is preserved neither i n these mu
F i g . ι. Bulimulus
eyriesii
( D r o u ë t ) . F r e n c h G u y a n a , near C a y e n n e ( M N H N ) .
seums nor i n the Muséum National d'Histoire Naturelle i n P aris and is, therefore, to be regarded as lost. I now select as lectotype the specimen figured on Pl . 1 fig. 1213 i n Drouët (1859). A lot of 14 specimens collected by F . Geay i n 1902 near Cayenne ( M N H N ) enables me to describe the genitalia of this species. Genitalia. — Genital atrium relatively short. The penis has a basal sheath
BREURE,
NOTES O N BULIMULIDAE, 4
I O C
and tapers towards the distal end, where the transition to the epiphallus is without external marks. The epiphallus, which has about the same length as the penis, is slender as is the flagellum, which is of about equal length to the epiphallus. The retractor muscle is inserted at the distal end of the flagellum. The vagina is short, about one fifth of the length of the penis. Oviduct length four times the length of the vagina. The spermathecal duct is subcylindrical, narrowing towards the distal end, which bears a bean-shaped spermatheca. Bulimulus cf. tenuissimus (d'Orbigny, 1835) (figs. 2, 3) Numerous specimens from Surinam in the RMNH-collection are tentatively referred to this Brazilian species. The material originates from the following localities: Nickerie District: Cupido at the Maratakka-River; Nieuw-Nickerie; Sipaliwini. Saramacca District: Raleigh Falls. Suriname District: Paramaribo; Meerzorg; between Weg-naar-Zee and Paramaribo; side-branch 5 of Saramacca Canal; Jodensavanne; Powaka; Mariënburg; Uitkijk. Brokopondo District: Brokopondo.
Fig.
2.
Bulimulus
cf.
tenuissimus
(d'Orbigny).
Surinam,
Paramaribo,
( R M N H ) . D r a w i n g b y courtesy o f D r . C . O . v a n R e g i e r e n
Cultuurtuin
Altena.
Dissection of specimens from several localities in Surinam ( R M N H ) , as well as from Montagnes de Montsanery, French Guyana ( M N H N ) [specimens from the latter locality also are only tentatively referred to this
110
F i g . 3. Bulimulus
ZOOLOGISCHE
cf. tenuissimus
MEDEDELINGEN
(dOrbigny). sanery
50 (1976)
F r e n c h Guyana, Montagnes
de M o n t -
(MNHN).
species], does not reveal any important differences compared with the data presented by Rezende & Lanzieri (1964) and Araujo, Rezende & Fraga Rodrigues (1960).
BREURE,
NOTES
ON BULIMULIDAE,
111
4
Drymaeus vernhouti nom. η. (fig. 4) Drymaeus
quadrifasciatus
V e r n h o u t , 1914: 12, pl. 1 fig. 4, not Drymaeus
quadrifasciatus
( A n g a s , 1878).
The species was described from two specimens, which upon dissection prove to be subadult. Genitalia. — P enis slender, slightly swollen at distal end. Length of epi phallus slightly more than length of penis. Flagellum about half as long as epiphallus. Vagina and oviduct about equal i n length.
F i g . 4. Drymaeus
vernhouti
n o m . η. S u r i n a m ,
quadrifasciatus
J a n Basi
Vernhout,
Gado
(holotype o f
Drymaeus
R M N H ) .
This species resembles Drymaeus binominis ( E . A . Smith) from Grenada, West Indies.
112
ZOOLOGISCHE
MEDEDELINGEN
50 (1976)
Drymaeus semimaculatus Pilsbry, 1898 Restudying the type material of Drymaeus interruptofasciatus Vernhout, I am unable to separate this species from D. semimaculatus. The type of Drymaeus interruptofasciatus, preserved i n alcohol, proved to be immature. Also the other material of this species described by Vernhout is juvenile. Fourteen specimens from Ilet-le-Père, French Guyana ( M N H N ) , collected by F . Geay in 1902, are tentatively referred to this species. They differ in having the bands continuous and only lightly brown coloured. Unfortunately these specimens are also immature. Eventually they may prove to belong to Drymaeus rufolineatus (Drouët), in which case the relationship between that species and D. semimaculatus deserves more attention.
Drymaeus altenai sp. n. Drymaeus
papyraceus,
Altena,
1975: 41, f i g . 6.
Diagnosis. — A species of Drymaeus characterized by its colour-pattern of greyish-white lines and brown streaks, the ovate aperture and the small, brown dots on the greater part of the aperture. Description. — Shell 30 mm long (apex missing), perforate, sides slightly convex, rather thin. Colour white with greyish-white longitudinal lines and irregular brown streaks. Surface slightly shining, with hardly undulating, incised spiral lines. Whorls ?, slightly convex. Suture well impressed. Aperture ovate, showing the colourpattern inside. Parietal region with callus. Peristome thin, expanded. Columellar margin reflexed. Basal margin, columellar margin, callus and upper part of palatal margin coloured with irregular, small brown dots. Measurements. — Shell height 30 mm, diameter 16 mm, height of aperture 16.5 mm, width 10.1 mm. Type locality. — Surinam, near Lucie River. Material. — Z M A , D . L . Fernandes leg., 1926: holotype. Remarks. — This species resembles Drymaeus papyraceus (Mawe), which is reported by Morretes (1949) from Brazil, States of Bahia, R i o de Janeiro, Paraná and R i o Grande do S u l , and from Argentina, Prov. Corrientes. Drymaeus altenai differs i n having a less regular colour pattern, a more ovate aperture, with brown dots on its greater part, while a distinct white umbilical patch is absent. Etymology. — Named i n honour of D r . C. O. van Regieren Altena, who contributed so much to our knowledge of the Surinam malacofauna.
BREURE,
NOTES O N BULIMULIDAE,
113
4
Drymaeus glaucostomus meesi subsp. n. (pi. i ) This subspecies differs from Drymaeus glaucostomus glaucostomus (Albers) by ( i ) being smaller; (2) being less elongated; (3) that the vertical streaks of the colour pattern continue as far as the suture; (4) the blackish bands which have irregular, somewhat interrupted white lines; (5) having the aperture oblique; (6) the white peristome. Measurements (in mm): shell height
number o f
aperture
diameter
height
width
whorls 5.8
27.0
16.0
144
11.3
26.5
16.5
15.0
11.5
holotype paratype
Type locality. — Surinam, Nassau Mountains, ca. 530 m. Material. — R M N H 55077 (holotype), R M N H 55078 (paratype); both G. F . Mees leg., 18 July - 9 August 1972. Etymology. — I have much pleasure in naming this subspecies after the collector, D r . G . F . Mees, who always makes special effort to collect land snails during his ornithological or ichthyological field work. Drymaeus chevallieri sp. n. (figs. 5-9) Diagnosis. — A species of Drymaeus characterized by its size, the expanded basal margin of the peristome and the continuous colour bands. Description. — Shell up to 24 mm, 1.99 times as long as wide, perforate, sides slightly convex, rather elongated, moderately thin. Colour whitish (with five brown spiral bands; see remarks). Surface shining, with incised, undul-
F i g . 5-8. Drymaeus
chevallieri
sp. n . F r e n c h G u y a n a , S a n t H e r m i n a , M a r o n i . H o l o t y p e
(figs. 5-7) a n d paratype
(fig. 8). ( M N H N ) .
ZOOLOGISCHE MEDEDELINGEN 50 (1976)
114
ating Spiral striae. Whorls 5.8, rather convex. Last whorl rather swollen. Suture well impressed. Aperture ovate, hardly oblique, about 1.55 times as long as wide. Peristome thin, basal margin expanded. Columellar margin reflexed and dilated. Measurements (in mm) : shell height
aperture
diameter
height
number o f
width
whorls
24.0
12.7
11.7
7-3
5.9
21.9
10.1
10.0
21.9
11.0
10.3
6.4 6.6
59 6.0
20.8
11.0
5-5
10.6
10.5 10.2
6.7
21.5 20.8
6.5
5-7
10.7
9.9
6.7
5.3
20.6
10.2
95
64
57
F i g . 9. Drymaeus
chevallieri
sp. n . F r e n c h G u y a n a ,
Sant H e r m i n a , M a r o n i .
(MNHN).
Genitalia. — Penis comparatively long, slightly swollen in basal part, more strongly swollen i n distal part. Epiphallus and flagellum slender. Vagina short, about one fifth the length of the penis. Oviduct about twice length
BREURE,
NOTES
ON BULIMULIDAE,
115
4
of vagina. Spermathecal duct moderately long, with a clubshaped sperma theca at distal end. Type locality. — French Guyana, Sant Hermina, Maroni. Material. — M N H N , 13 specimens from the type locality, F . Geay leg., 1904 (includes holotype); R M N H 9023, one specimen (same data). Remarks. — This species resembles Drymaeus semimaculatus P ilsbry from Surinam but differs in being broader, with a more globose last whorl and a more ovate aperture. Probably because of preservation in alcohol the colour pattern of the shells has faded. However, in some specimens the outer side of the lung cavity shows remnants of the colour pattern, which indicate five brown, continuous spiral bands. Etymology. — Named in honour of M r . H . Chevallier (P aris). Leiostracus ruthveni ( H . B . Baker, 1926) One, possibly subadult, specimen is at hand from Surinam, collected in 1926 near the Lucie River by D . L . Fernandes ( Z M A ) . This is the first record of this species for Surinam. Leiostracus ruthveni was described from near Dunoon, British Guiana [ = Guyana] and is also recorded from Cayenne, French Guyana. REFERENCES ALTENA,
C. O . V A N REGT EREN,
1975. L a n d
o f a n e w species o f N e s o p u p a .
—
Gastropoda
of
Surinam,
with
A R A U J O , J . L . B . , H . E . B . R E Z E N D E & P . A . F R A G A RODRIGUES, i960. S o b r e tenuissimus
(O r b i g n y ,
1835)
description
B a s t e r i a , 3 9 : 29-50.
(Gastropoda,
Pulmonata).
—
Bulimulus
R e v t a brasil. B i o l . , 2 0 :
33-42. B R E U R E , A . S. H . , 1974. C a r i b b e a n
l a n d molluscs : B u l i m u l i d a e
I. B u l i m u l u s . —
Stud.
f a u n a Curaçao, 45 : 1-80. DiiouËT,
H . , 1859. E s s a i
sur les mollusques
terrestres
et
fluviatiles
de l a
Guyane
française: 1-116. P a r i s . K U I P E R , J . G . J . , 1969. Schetsen uit de malacologische geschiedenis v a n F r a n k r i j k .
—
C o r r . BÍ. N e d . malac. V e r . , 133: 1427-1474. P A R O D I Z , J . J . , 1962. N e w a n d l i t t l e - k n o w n snails
(Bulimulidae).
—
species o f S o u t h a n d C e n t r a l A m e r i c a n
P r o c . U . S. nat. M u s . , 113:
P I L S B R Y , H . Α . , 1899. M a n u a l o f C o n c h o l o g y , REZENDE, sobre
Η . Ε . Β. o
órgão
(Gastropoda,
&
P . D . LANZIERI,
copulador
Pulmonata,
masculino
(2) 12: 1-258. P h i l a d e l p h i a .
1964. O bservações de
Bulimulidae). —
Bulimulus
anatómicas
tenuissimus
e histológicas
O ( rbigny,
1835)
R e v t a brasil. B i o l . , 2 4 : 409-415.
V E R N H O U T , J . H . , 1914. T h e n o n - m a r i n e molluscs 3 6 : 1-46.
land
429-456.
of Surinam. —
Notes Leyden M u s . ,
Z O O L O G I S C H E
M E D E D E L I N G E N
50
(7)
Drymaeus glaucostomus m e e s i subsp. n. Surinam, Nassau ( R M N H 55077, holotype). Chr. Hoorn phot.
PL.
1
Mountains
